Merge remote-tracking branch 'origin/dev' into agent/dex/CUB-33-moonraker-usage-polling

# Conflicts:
#	backend/Domain/Interfaces/IMoonrakerClient.cs
#	backend/Infrastructure/Services/MoonrakerClient.cs

.gitea/workflows/dev.yml

@@ -20,15 +20,12 @@ jobs:
 
       - name: Restore backend
         run: dotnet restore
-        working-directory: ./backend
 
       - name: Build backend
         run: dotnet build --no-restore --configuration Release
-        working-directory: ./backend
 
       - name: Test backend
         run: dotnet test --no-build --configuration Release
-        working-directory: ./backend
 
       - name: Setup Node
         uses: actions/setup-node@v4
@@ -42,3 +39,39 @@ jobs:
       - name: Build frontend
         run: npm run build
         working-directory: ./frontend
+
+  deploy-dev:
+    needs: build-test
+    if: gitea.event_name == 'push'
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Deploy dev
+        run: |
+          echo "${{ secrets.DEV_DEPLOY_SSH_KEY }}" > /tmp/dev_key
+          chmod 600 /tmp/dev_key
+          ssh -i /tmp/dev_key -o StrictHostKeyChecking=no \
+            ${{ secrets.DEV_DEPLOY_USER }}@${{ secrets.DEV_DEPLOY_HOST }} \
+            "${{ secrets.DEV_DEPLOY_PATH }}/deploy.sh"
+
+  notify-success:
+    needs: [build-test, deploy-dev]
+    if: success() && gitea.event_name == 'push'
+    runs-on: ubuntu-latest
+    steps:
+      - name: Notify Slack success
+        run: |
+          curl -X POST -H 'Content-type: application/json' \
+            --data "{\"text\":\"✅ Extrudex dev deployed successfully from dev branch.\"}" \
+            "${{ secrets.SLACK_WEBHOOK_URL }}"
+
+  notify-failure:
+    needs: [build-test, deploy-dev]
+    if: failure()
+    runs-on: ubuntu-latest
+    steps:
+      - name: Notify Slack failure
+        run: |
+          curl -X POST -H 'Content-type: application/json' \
+            --data "{\"text\":\"🚨 Extrudex dev pipeline failed. Check Gitea Actions for details.\"}" \
+            "${{ secrets.SLACK_WEBHOOK_URL }}"

backend/API/Controllers/CostAnalysisController.cs

@@ -1,108 +0,0 @@
-using Extrudex.API.DTOs.PrintJobs;
-using Extrudex.Domain.Interfaces;
-using Microsoft.AspNetCore.Mvc;
-
-namespace Extrudex.API.Controllers;
-
-/// <summary>
-/// Controller for cost analysis endpoints. Provides spool-level
-/// cost breakdowns and aggregated COGS reporting.
-/// </summary>
-[ApiController]
-[Route("api/cost-analysis")]
-public class CostAnalysisController : ControllerBase
-{
-    private readonly ICostPerPrintService _costService;
-    private readonly ILogger<CostAnalysisController> _logger;
-
-    /// <summary>
-    /// Initializes a new instance of the <see cref="CostAnalysisController"/> class.
-    /// </summary>
-    /// <param name="costService">The cost-per-print calculation service.</param>
-    /// <param name="logger">The logger for diagnostic output.</param>
-    public CostAnalysisController(
-        ICostPerPrintService costService,
-        ILogger<CostAnalysisController> logger)
-    {
-        _costService = costService;
-        _logger = logger;
-    }
-
-    // ── POST /api/cost-analysis/spool ────────────────────────────
-
-    /// <summary>
-    /// Calculates cost breakdowns for all print jobs associated with a specific spool.
-    /// Returns per-job costs plus an aggregated total. Jobs with missing cost data
-    /// include warnings and null cost fields — the endpoint never throws for missing data.
-    /// </summary>
-    /// <param name="request">The request containing the spool identifier.</param>
-    /// <returns>A spool-level cost summary with per-job breakdowns.</returns>
-    /// <response code="200">Returns the spool cost breakdown with per-job details.</response>
-    /// <response code="404">If the spool has no print jobs.</response>
-    [HttpPost("spool")]
-    [ProducesResponseType(typeof(SpoolCostResponse), StatusCodes.Status200OK)]
-    [ProducesResponseType(StatusCodes.Status404NotFound)]
-    public async Task<ActionResult<SpoolCostResponse>> CalculateSpoolCost([FromBody] SpoolCostRequest request)
-    {
-        _logger.LogDebug("Calculating cost breakdown for spool {SpoolId}", request.SpoolId);
-
-        var results = await _costService.CalculateBySpoolAsync(request.SpoolId);
-
-        if (results.Count == 0)
-        {
-            return NotFound(new { error = $"No print jobs found for spool with ID '{request.SpoolId}'." });
-        }
-
-        // Build the spool-level summary
-        var firstResult = results[0];
-        var jobResponses = results.Select(MapCostToResponse).ToList();
-
-        // Aggregate total cost and grams — only include jobs that have a valid cost
-        var calculableJobs = results.Where(r => r.CostPerPrint.HasValue).ToList();
-        var totalCost = calculableJobs.Count == results.Count
-            ? Math.Round(calculableJobs.Sum(r => r.CostPerPrint!.Value), 4)
-            : (decimal?)null;
-
-        var aggregateWarnings = new List<string>();
-        if (calculableJobs.Count < results.Count)
-        {
-            aggregateWarnings.Add(
-                $"{results.Count - calculableJobs.Count} of {results.Count} print jobs have missing cost data. " +
-                "Total cost reflects only jobs with complete data.");
-        }
-
-        var response = new SpoolCostResponse
-        {
-            SpoolId = request.SpoolId,
-            SpoolSerial = firstResult.SpoolSerial,
-            PurchasePrice = firstResult.PurchasePrice,
-            WeightTotalGrams = firstResult.WeightTotalGrams,
-            CostPerGram = firstResult.CostPerGram,
-            TotalGramsConsumed = results.Sum(r => r.GramsDerived),
-            TotalCost = totalCost,
-            JobCount = results.Count,
-            Jobs = jobResponses,
-            Warnings = aggregateWarnings
-        };
-
-        return Ok(response);
-    }
-
-    /// <summary>
-    /// Maps a domain CostPerPrintResult to an API CostPerPrintResponse DTO.
-    /// </summary>
-    private static CostPerPrintResponse MapCostToResponse(CostPerPrintResult r) => new()
-    {
-        PrintJobId = r.PrintJobId,
-        PrintName = r.PrintName,
-        SpoolId = r.SpoolId,
-        SpoolSerial = r.SpoolSerial,
-        MmExtruded = r.MmExtruded,
-        GramsDerived = r.GramsDerived,
-        PurchasePrice = r.PurchasePrice,
-        WeightTotalGrams = r.WeightTotalGrams,
-        CostPerGram = r.CostPerGram,
-        CostPerPrint = r.CostPerPrint,
-        Warnings = r.Warnings
-    };
-}

backend/API/Controllers/FilamentsController.cs

@@ -1,7 +1,6 @@
 using Extrudex.API.DTOs;
 using Extrudex.API.DTOs.Filaments;
 using Extrudex.Domain.Entities;
-using Extrudex.Domain.Interfaces;
 using Extrudex.Infrastructure.Data;
 using Microsoft.AspNetCore.Mvc;
 using Microsoft.EntityFrameworkCore;
@@ -18,22 +17,16 @@ namespace Extrudex.API.Controllers;
 public class FilamentsController : ControllerBase
 {
     private readonly ExtrudexDbContext _dbContext;
-    private readonly ILowStockDetector _lowStockDetector;
     private readonly ILogger<FilamentsController> _logger;
 
     /// <summary>
     /// Initializes a new instance of the <see cref="FilamentsController"/> class.
     /// </summary>
     /// <param name="dbContext">The database context for data access.</param>
-    /// <param name="lowStockDetector">The low-stock detection service for filament alerts.</param>
     /// <param name="logger">The logger for diagnostic output.</param>
-    public FilamentsController(
-        ExtrudexDbContext dbContext,
-        ILowStockDetector lowStockDetector,
-        ILogger<FilamentsController> logger)
+    public FilamentsController(ExtrudexDbContext dbContext, ILogger<FilamentsController> logger)
     {
         _dbContext = dbContext;
-        _lowStockDetector = lowStockDetector;
         _logger = logger;
     }
 
@@ -102,7 +95,7 @@ public class FilamentsController : ControllerBase
             .OrderByDescending(s => s.CreatedAt)
             .Skip((pageNumber - 1) * pageSize)
             .Take(pageSize)
-            .Select(s => MapToFilamentResponse(s, _lowStockDetector))
+            .Select(s => MapToFilamentResponse(s))
             .ToListAsync();
 
         var response = new PagedResponse<FilamentResponse>
@@ -143,7 +136,7 @@ public class FilamentsController : ControllerBase
             return NotFound(new { error = $"Filament with ID '{id}' not found." });
         }
 
-        return Ok(MapToFilamentResponse(spool, _lowStockDetector));
+        return Ok(MapToFilamentResponse(spool));
     }
 
     /// <summary>
@@ -218,7 +211,7 @@ public class FilamentsController : ControllerBase
         if (entity.MaterialModifierId.HasValue)
             await _dbContext.Entry(entity).Reference(s => s.MaterialModifier).LoadAsync();
 
-        var response = MapToFilamentResponse(entity, _lowStockDetector);
+        var response = MapToFilamentResponse(entity);
         return CreatedAtAction(nameof(GetFilament), new { id = entity.Id }, response);
     }
 
@@ -299,97 +292,7 @@ public class FilamentsController : ControllerBase
         if (entity.MaterialModifierId.HasValue)
             await _dbContext.Entry(entity).Reference(s => s.MaterialModifier).LoadAsync();
 
-        return Ok(MapToFilamentResponse(entity, _lowStockDetector));
-    }
-
-    /// <summary>
-    /// Gets only the filament spools that are flagged as low stock.
-    /// A spool is considered low stock when its remaining weight percentage
-    /// is at or below the configured threshold.
-    /// </summary>
-    /// <returns>A list of low-stock filament spools with alert metadata.</returns>
-    /// <response code="200">Returns the list of low-stock filament spools.</response>
-    [HttpGet("low-stock")]
-    [ProducesResponseType(typeof(List<FilamentResponse>), StatusCodes.Status200OK)]
-    public async Task<ActionResult<List<FilamentResponse>>> GetLowStockFilaments()
-    {
-        _logger.LogDebug("Getting low-stock filaments (threshold: {Threshold}%)",
-            _lowStockDetector.LowStockThresholdPercent);
-
-        var spools = await _dbContext.Spools
-            .Include(s => s.MaterialBase)
-            .Include(s => s.MaterialFinish)
-            .Include(s => s.MaterialModifier)
-            .Where(s => s.IsActive)
-            .OrderByDescending(s => s.CreatedAt)
-            .ToListAsync();
-
-        var lowStockItems = spools
-            .Where(s => _lowStockDetector.IsLowStock(s.WeightRemainingGrams, s.WeightTotalGrams))
-            .Select(s => MapToFilamentResponse(s, _lowStockDetector))
-            .ToList();
-
-        return Ok(lowStockItems);
-    }
-
-    /// <summary>
-    /// Deletes a filament spool by its unique identifier.
-    /// If the spool has associated print jobs, the deletion is rejected with a 409 Conflict
-    /// to preserve COGS and print history — the caller should archive the spool instead.
-    /// Associated filament usage records are removed before the spool is deleted.
-    /// AMS slots referencing this spool will have their SpoolId set to null by the database.
-    /// </summary>
-    /// <param name="id">The unique identifier of the filament spool to delete.</param>
-    /// <returns>No content on successful deletion.</returns>
-    /// <response code="204">The filament spool was successfully deleted.</response>
-    /// <response code="404">If the filament spool with the given ID is not found.</response>
-    /// <response code="409">If the spool has associated print jobs and cannot be deleted.</response>
-    [HttpDelete("{id:guid}")]
-    [ProducesResponseType(StatusCodes.Status204NoContent)]
-    [ProducesResponseType(StatusCodes.Status404NotFound)]
-    [ProducesResponseType(StatusCodes.Status409Conflict)]
-    public async Task<IActionResult> DeleteFilament(Guid id)
-    {
-        _logger.LogInformation("Deleting filament {Id}", id);
-
-        var entity = await _dbContext.Spools.FindAsync(id);
-        if (entity is null)
-        {
-            _logger.LogWarning("Filament {Id} not found for deletion", id);
-            return NotFound(new { error = $"Filament with ID '{id}' not found." });
-        }
-
-        // Check for associated print jobs — these cannot be orphaned
-        var hasPrintJobs = await _dbContext.PrintJobs.AnyAsync(pj => pj.SpoolId == id);
-        if (hasPrintJobs)
-        {
-            _logger.LogWarning(
-                "Cannot delete filament {Id}: associated print jobs exist. Suggest archiving instead.", id);
-            return Conflict(new
-            {
-                error = $"Cannot delete filament '{id}' because it has associated print jobs. " +
-                        "Archive the filament instead to preserve print history and COGS data."
-            });
-        }
-
-        // Remove associated filament usage records (usage tracking data for this spool)
-        var usageRecords = await _dbContext.FilamentUsages
-            .Where(fu => fu.SpoolId == id)
-            .ToListAsync();
-
-        if (usageRecords.Count > 0)
-        {
-            _logger.LogInformation(
-                "Removing {Count} filament usage records for spool {Id}",
-                usageRecords.Count, id);
-            _dbContext.FilamentUsages.RemoveRange(usageRecords);
-        }
-
-        _dbContext.Spools.Remove(entity);
-        await _dbContext.SaveChangesAsync();
-
-        _logger.LogInformation("Filament {Id} deleted successfully", id);
-        return NoContent();
+        return Ok(MapToFilamentResponse(entity));
     }
 
     // ── Mapping helper ─────────────────────────────────────────
@@ -398,12 +301,10 @@ public class FilamentsController : ControllerBase
     /// Maps a Spool domain entity to a FilamentResponse DTO.
     /// Denormalizes material names for display convenience.
     /// Populates the QrCodeUrl for easy frontend access to the spool's QR code.
-    /// Calculates low-stock status and remaining weight percentage.
     /// </summary>
     /// <param name="s">The spool entity to map.</param>
-    /// <param name="lowStockDetector">The low-stock detection service for computing alert flags.</param>
-    /// <returns>A FilamentResponse DTO with denormalized material names, QR code URL, and low-stock metadata.</returns>
-    private static FilamentResponse MapToFilamentResponse(Spool s, ILowStockDetector lowStockDetector) => new()
+    /// <returns>A FilamentResponse DTO with denormalized material names and QR code URL.</returns>
+    private static FilamentResponse MapToFilamentResponse(Spool s) => new()
     {
         Id = s.Id,
         MaterialBaseId = s.MaterialBaseId,
@@ -426,8 +327,6 @@ public class FilamentsController : ControllerBase
         StorageLocation = s.StorageLocation,
         CreatedAt = s.CreatedAt,
         UpdatedAt = s.UpdatedAt,
-        QrCodeUrl = $"/api/qr/spool/{s.Id}",
-        IsLowStock = lowStockDetector.IsLowStock(s.WeightRemainingGrams, s.WeightTotalGrams),
-        RemainingWeightPercent = lowStockDetector.GetRemainingWeightPercent(s.WeightRemainingGrams, s.WeightTotalGrams)
+        QrCodeUrl = $"/api/qr/spool/{s.Id}"
     };
 }

backend/API/Controllers/UsageLogsController.cs

@@ -1,117 +0,0 @@
-using Extrudex.API.DTOs.UsageLogs;
-using Extrudex.Domain.Enums;
-using Extrudex.Domain.Interfaces;
-using Microsoft.AspNetCore.Mvc;
-
-namespace Extrudex.API.Controllers;
-
-/// <summary>
-/// API controller for recording and querying filament usage logs.
-/// Usage logs provide a fine-grained audit trail of filament consumption
-/// from printer integrations or manual input.
-/// </summary>
-[ApiController]
-[Route("api/[controller]")]
-[Produces("application/json")]
-public class UsageLogsController : ControllerBase
-{
-    private readonly IUsageLogService _usageLogService;
-
-    /// <summary>
-    /// Initializes a new instance of the <see cref="UsageLogsController"/> class.
-    /// </summary>
-    /// <param name="usageLogService">The usage log service for recording and querying usage.</param>
-    public UsageLogsController(IUsageLogService usageLogService)
-    {
-        _usageLogService = usageLogService;
-    }
-
-    /// <summary>
-    /// Records a new filament usage entry.
-    /// </summary>
-    /// <param name="request">The usage entry details.</param>
-    /// <returns>The created usage log entry.</returns>
-    [HttpPost]
-    [ProducesResponseType(typeof(UsageLogResponse), StatusCodes.Status201Created)]
-    [ProducesResponseType(StatusCodes.Status400BadRequest)]
-    public async Task<ActionResult<UsageLogResponse>> Create([FromBody] CreateUsageLogRequest request)
-    {
-        if (!Enum.TryParse<DataSource>(request.DataSource, ignoreCase: true, out var dataSource))
-        {
-            return BadRequest($"Invalid data source: '{request.DataSource}'. Valid values: Mqtt, Moonraker, Manual.");
-        }
-
-        var entry = await _usageLogService.RecordUsageAsync(
-            spoolId: request.SpoolId,
-            gramsUsed: request.GramsUsed,
-            dataSource: dataSource,
-            printerId: request.PrinterId,
-            printJobId: request.PrintJobId,
-            mmExtruded: request.MmExtruded,
-            usageTimestamp: request.UsageTimestamp,
-            notes: request.Notes
-        );
-
-        return CreatedAtAction(
-            nameof(GetBySpool),
-            new { spoolId = entry.SpoolId },
-            MapToResponse(entry));
-    }
-
-    /// <summary>
-    /// Gets usage logs for a specific spool, ordered by most recent first.
-    /// </summary>
-    /// <param name="spoolId">The spool ID to filter by.</param>
-    /// <returns>A collection of usage log entries for the spool.</returns>
-    [HttpGet("spool/{spoolId:guid}")]
-    [ProducesResponseType(typeof(IEnumerable<UsageLogResponse>), StatusCodes.Status200OK)]
-    public async Task<ActionResult<IEnumerable<UsageLogResponse>>> GetBySpool(Guid spoolId)
-    {
-        var logs = await _usageLogService.GetBySpoolAsync(spoolId);
-        return Ok(logs.Select(MapToResponse));
-    }
-
-    /// <summary>
-    /// Gets usage logs for a specific printer, ordered by most recent first.
-    /// </summary>
-    /// <param name="printerId">The printer ID to filter by.</param>
-    /// <returns>A collection of usage log entries for the printer.</returns>
-    [HttpGet("printer/{printerId:guid}")]
-    [ProducesResponseType(typeof(IEnumerable<UsageLogResponse>), StatusCodes.Status200OK)]
-    public async Task<ActionResult<IEnumerable<UsageLogResponse>>> GetByPrinter(Guid printerId)
-    {
-        var logs = await _usageLogService.GetByPrinterAsync(printerId);
-        return Ok(logs.Select(MapToResponse));
-    }
-
-    /// <summary>
-    /// Gets usage logs for a specific print job, ordered by most recent first.
-    /// </summary>
-    /// <param name="printJobId">The print job ID to filter by.</param>
-    /// <returns>A collection of usage log entries for the print job.</returns>
-    [HttpGet("print-job/{printJobId:guid}")]
-    [ProducesResponseType(typeof(IEnumerable<UsageLogResponse>), StatusCodes.Status200OK)]
-    public async Task<ActionResult<IEnumerable<UsageLogResponse>>> GetByPrintJob(Guid printJobId)
-    {
-        var logs = await _usageLogService.GetByPrintJobAsync(printJobId);
-        return Ok(logs.Select(MapToResponse));
-    }
-
-    /// <summary>
-    /// Maps a UsageLog domain entity to a UsageLogResponse DTO.
-    /// </summary>
-    private static UsageLogResponse MapToResponse(Domain.Entities.UsageLog log) => new()
-    {
-        Id = log.Id,
-        SpoolId = log.SpoolId,
-        PrinterId = log.PrinterId,
-        PrintJobId = log.PrintJobId,
-        GramsUsed = log.GramsUsed,
-        MmExtruded = log.MmExtruded,
-        UsageTimestamp = log.UsageTimestamp,
-        DataSource = log.DataSource.ToString(),
-        Notes = log.Notes,
-        CreatedAt = log.CreatedAt,
-        UpdatedAt = log.UpdatedAt
-    };
-}

backend/API/DTOs/Filaments/FilamentDtos.cs

@@ -76,19 +76,6 @@ public class FilamentResponse
     /// Encodes a deep link to the spool's detail page.
     /// </summary>
     public string QrCodeUrl { get; set; } = string.Empty;
-
-    /// <summary>
-    /// Whether this spool is flagged as low stock — remaining weight is at or
-    /// below the configured low-stock threshold percentage.
-    /// Useful for UI alerts and inventory dashboards.
-    /// </summary>
-    public bool IsLowStock { get; set; }
-
-    /// <summary>
-    /// Remaining filament weight as a percentage of total weight (0–100).
-    /// Rounded to one decimal place. Returns 0 if total weight is zero.
-    /// </summary>
-    public decimal RemainingWeightPercent { get; set; }
 }
 
 /// <summary>

backend/API/DTOs/PrintJobs/CostPerPrintDtos.cs

@@ -1,99 +0,0 @@
-using System.ComponentModel.DataAnnotations;
-
-namespace Extrudex.API.DTOs.PrintJobs;
-
-/// <summary>
-/// Response DTO for cost-per-print calculation. Contains the full cost
-/// breakdown and any warnings about missing or incomplete data.
-/// </summary>
-public class CostPerPrintResponse
-{
-    /// <summary>The print job identifier this result belongs to.</summary>
-    public Guid PrintJobId { get; set; }
-
-    /// <summary>Human-readable name of the print job.</summary>
-    public string PrintName { get; set; } = string.Empty;
-
-    /// <summary>The spool identifier that provided filament.</summary>
-    public Guid SpoolId { get; set; }
-
-    /// <summary>Serial number of the spool.</summary>
-    public string SpoolSerial { get; set; } = string.Empty;
-
-    /// <summary>Total millimeters of filament extruded.</summary>
-    public decimal MmExtruded { get; set; }
-
-    /// <summary>Derived grams consumed for this print.</summary>
-    public decimal GramsDerived { get; set; }
-
-    /// <summary>The spool's purchase price. Null if not recorded.</summary>
-    public decimal? PurchasePrice { get; set; }
-
-    /// <summary>The spool's total weight in grams when full.</summary>
-    public decimal? WeightTotalGrams { get; set; }
-
-    /// <summary>Cost per gram of filament. Null if purchase price or total weight is missing.</summary>
-    public decimal? CostPerGram { get; set; }
-
-    /// <summary>Calculated cost of this print job. Null if cost data is incomplete.</summary>
-    public decimal? CostPerPrint { get; set; }
-
-    /// <summary>
-    /// Warnings about missing or incomplete data. Empty when all data is available
-    /// and the calculation succeeded.
-    /// </summary>
-    public List<string> Warnings { get; set; } = new();
-}
-
-/// <summary>
-/// Request DTO for batch cost calculation by spool. Returns cost breakdowns
-/// for all print jobs associated with the specified spool.
-/// </summary>
-public class SpoolCostRequest
-{
-    /// <summary>The unique identifier of the spool to calculate costs for.</summary>
-    [Required(ErrorMessage = "SpoolId is required.")]
-    public Guid SpoolId { get; set; }
-}
-
-/// <summary>
-/// Response DTO for spool-level cost calculation. Contains cost breakdowns
-/// for all print jobs on the spool, plus a total cost summary.
-/// </summary>
-public class SpoolCostResponse
-{
-    /// <summary>The spool identifier.</summary>
-    public Guid SpoolId { get; set; }
-
-    /// <summary>Serial number of the spool.</summary>
-    public string SpoolSerial { get; set; } = string.Empty;
-
-    /// <summary>The spool's purchase price. Null if not recorded.</summary>
-    public decimal? PurchasePrice { get; set; }
-
-    /// <summary>The spool's total weight in grams when full.</summary>
-    public decimal? WeightTotalGrams { get; set; }
-
-    /// <summary>Cost per gram of filament. Null if cost data is incomplete.</summary>
-    public decimal? CostPerGram { get; set; }
-
-    /// <summary>Total grams consumed across all print jobs on this spool.</summary>
-    public decimal TotalGramsConsumed { get; set; }
-
-    /// <summary>Total calculated cost across all print jobs. Null if any job has missing data.</summary>
-    public decimal? TotalCost { get; set; }
-
-    /// <summary>Number of print jobs included in this calculation.</summary>
-    public int JobCount { get; set; }
-
-    /// <summary>
-    /// Individual cost breakdowns per print job. Jobs with missing data
-    /// will have null cost fields and populated warnings.
-    /// </summary>
-    public List<CostPerPrintResponse> Jobs { get; set; } = new();
-
-    /// <summary>
-    /// Aggregate warnings about missing data across all jobs.
-    /// </summary>
-    public List<string> Warnings { get; set; } = new();
-}

backend/API/DTOs/UsageLogs/UsageLogDtos.cs

@@ -1,115 +0,0 @@
-using System.ComponentModel.DataAnnotations;
-
-namespace Extrudex.API.DTOs.UsageLogs;
-
-/// <summary>
-/// Request DTO for recording a filament usage entry.
-/// </summary>
-public class CreateUsageLogRequest
-{
-    /// <summary>
-    /// The ID of the spool that provided the filament.
-    /// </summary>
-    [Required]
-    public Guid SpoolId { get; set; }
-
-    /// <summary>
-    /// The number of grams of filament consumed.
-    /// </summary>
-    [Required]
-    [Range(0.01, double.MaxValue, ErrorMessage = "GramsUsed must be a positive value.")]
-    public decimal GramsUsed { get; set; }
-
-    /// <summary>
-    /// The source of the usage data (Mqtt, Moonraker, Manual).
-    /// </summary>
-    [Required]
-    public string DataSource { get; set; } = string.Empty;
-
-    /// <summary>
-    /// The ID of the printer that consumed the filament. Optional.
-    /// </summary>
-    public Guid? PrinterId { get; set; }
-
-    /// <summary>
-    /// The ID of the print job associated with this usage. Optional.
-    /// </summary>
-    public Guid? PrintJobId { get; set; }
-
-    /// <summary>
-    /// The number of millimeters of filament extruded. Optional.
-    /// </summary>
-    public decimal? MmExtruded { get; set; }
-
-    /// <summary>
-    /// When the usage occurred (UTC). Defaults to now if not specified.
-    /// </summary>
-    public DateTime? UsageTimestamp { get; set; }
-
-    /// <summary>
-    /// Optional notes about this usage entry.
-    /// </summary>
-    [MaxLength(2000)]
-    public string? Notes { get; set; }
-}
-
-/// <summary>
-/// Response DTO for a usage log entry.
-/// </summary>
-public class UsageLogResponse
-{
-    /// <summary>
-    /// Unique identifier for the usage log entry.
-    /// </summary>
-    public Guid Id { get; set; }
-
-    /// <summary>
-    /// The spool that provided the filament.
-    /// </summary>
-    public Guid SpoolId { get; set; }
-
-    /// <summary>
-    /// The printer that consumed the filament, if applicable.
-    /// </summary>
-    public Guid? PrinterId { get; set; }
-
-    /// <summary>
-    /// The print job associated with this usage, if applicable.
-    /// </summary>
-    public Guid? PrintJobId { get; set; }
-
-    /// <summary>
-    /// Grams of filament consumed.
-    /// </summary>
-    public decimal GramsUsed { get; set; }
-
-    /// <summary>
-    /// Millimeters of filament extruded, if available.
-    /// </summary>
-    public decimal? MmExtruded { get; set; }
-
-    /// <summary>
-    /// When the usage occurred (UTC).
-    /// </summary>
-    public DateTime UsageTimestamp { get; set; }
-
-    /// <summary>
-    /// Source of the usage data (Mqtt, Moonraker, Manual).
-    /// </summary>
-    public string DataSource { get; set; } = string.Empty;
-
-    /// <summary>
-    /// Optional notes about this usage entry.
-    /// </summary>
-    public string? Notes { get; set; }
-
-    /// <summary>
-    /// When the record was created (UTC).
-    /// </summary>
-    public DateTime CreatedAt { get; set; }
-
-    /// <summary>
-    /// When the record was last updated (UTC).
-    /// </summary>
-    public DateTime UpdatedAt { get; set; }
-}

backend/API/Jobs/FilamentUsageSyncJob.cs

@@ -1,79 +0,0 @@
-using Extrudex.Domain.Interfaces;
-using Extrudex.Infrastructure.Configuration;
-using Microsoft.Extensions.Hosting;
-using Microsoft.Extensions.Logging;
-using Microsoft.Extensions.Options;
-
-namespace Extrudex.API.Jobs;
-
-/// <summary>
-/// Background job that periodically syncs filament usage data from
-/// Moonraker printers. Runs as a hosted service and polls all active
-/// Moonraker printers on a configurable interval to persist usage
-/// data to the Extrudex database.
-/// 
-/// Configuration is bound from the "FilamentUsageSync" section in
-/// appsettings.json. Set Enabled=false to disable without removing
-/// the service registration.
-/// </summary>
-public class FilamentUsageSyncJob : BackgroundService
-{
-    private readonly IFilamentUsageSyncService _syncService;
-    private readonly FilamentUsageSyncOptions _options;
-    private readonly ILogger<FilamentUsageSyncJob> _logger;
-
-    /// <summary>
-    /// Creates a new FilamentUsageSyncJob.
-    /// </summary>
-    /// <param name="syncService">The service that performs the actual sync logic.</param>
-    /// <param name="options">Configuration options for polling interval and timeouts.</param>
-    /// <param name="logger">Logger for diagnostic output.</param>
-    public FilamentUsageSyncJob(
-        IFilamentUsageSyncService syncService,
-        IOptions<FilamentUsageSyncOptions> options,
-        ILogger<FilamentUsageSyncJob> logger)
-    {
-        _syncService = syncService;
-        _options = options.Value;
-        _logger = logger;
-    }
-
-    /// <inheritdoc />
-    protected override async Task ExecuteAsync(CancellationToken stoppingToken)
-    {
-        if (!_options.Enabled)
-        {
-            _logger.LogInformation("Filament usage sync job is disabled via configuration — exiting");
-            return;
-        }
-
-        _logger.LogInformation(
-            "Filament usage sync job starting — polling every {Interval}",
-            _options.PollingInterval);
-
-        // Delay briefly on startup to allow the web host to fully initialize
-        await Task.Delay(TimeSpan.FromSeconds(10), stoppingToken);
-
-        while (!stoppingToken.IsCancellationRequested)
-        {
-            try
-            {
-                var syncedCount = await _syncService.SyncAllAsync(stoppingToken);
-
-                _logger.LogInformation(
-                    "Filament usage sync completed — {SyncedCount} printer(s) synced. Next sync in {Interval}",
-                    syncedCount, _options.PollingInterval);
-            }
-            catch (Exception ex) when (ex is not OperationCanceledException)
-            {
-                _logger.LogError(ex,
-                    "Error during filament usage sync cycle — will retry in {Interval}",
-                    _options.PollingInterval);
-            }
-
-            await Task.Delay(_options.PollingInterval, stoppingToken);
-        }
-
-        _logger.LogInformation("Filament usage sync job shutting down");
-    }
-}

backend/API/Jobs/MoonrakerPrinterSyncJob.cs

@@ -1,80 +0,0 @@
-using Extrudex.Domain.Interfaces;
-using Extrudex.Infrastructure.Configuration;
-using Microsoft.Extensions.Hosting;
-using Microsoft.Extensions.Logging;
-using Microsoft.Extensions.Options;
-
-namespace Extrudex.API.Jobs;
-
-/// <summary>
-/// Background service that periodically syncs Moonraker printer status
-/// and print job history into the Extrudex database. Runs as a hosted
-/// service and polls all active Moonraker printers on a configurable
-/// interval to update printer state and map completed print jobs
-/// to PrintJob and FilamentUsage entities.
-///
-/// Configuration is bound from the "MoonrakerPrinterSync" section in
-/// appsettings.json. Set Enabled=false to disable without removing
-/// the service registration.
-/// </summary>
-public class MoonrakerPrinterSyncJob : BackgroundService
-{
-    private readonly IMoonrakerPrinterSyncService _syncService;
-    private readonly MoonrakerPrinterSyncOptions _options;
-    private readonly ILogger<MoonrakerPrinterSyncJob> _logger;
-
-    /// <summary>
-    /// Creates a new MoonrakerPrinterSyncJob.
-    /// </summary>
-    /// <param name="syncService">The service that performs the actual sync logic.</param>
-    /// <param name="options">Configuration options for polling interval and timeouts.</param>
-    /// <param name="logger">Logger for diagnostic output.</param>
-    public MoonrakerPrinterSyncJob(
-        IMoonrakerPrinterSyncService syncService,
-        IOptions<MoonrakerPrinterSyncOptions> options,
-        ILogger<MoonrakerPrinterSyncJob> logger)
-    {
-        _syncService = syncService;
-        _options = options.Value;
-        _logger = logger;
-    }
-
-    /// <inheritdoc />
-    protected override async Task ExecuteAsync(CancellationToken stoppingToken)
-    {
-        if (!_options.Enabled)
-        {
-            _logger.LogInformation("Moonraker printer sync job is disabled via configuration — exiting");
-            return;
-        }
-
-        _logger.LogInformation(
-            "Moonraker printer sync job starting — polling every {Interval}",
-            _options.PollingInterval);
-
-        // Delay briefly on startup to allow the web host to fully initialize
-        await Task.Delay(TimeSpan.FromSeconds(15), stoppingToken);
-
-        while (!stoppingToken.IsCancellationRequested)
-        {
-            try
-            {
-                var syncedCount = await _syncService.SyncAllAsync(stoppingToken);
-
-                _logger.LogInformation(
-                    "Moonraker printer sync completed — {SyncedCount} printer(s) synced. Next sync in {Interval}",
-                    syncedCount, _options.PollingInterval);
-            }
-            catch (Exception ex) when (ex is not OperationCanceledException)
-            {
-                _logger.LogError(ex,
-                    "Error during Moonraker printer sync cycle — will retry in {Interval}",
-                    _options.PollingInterval);
-            }
-
-            await Task.Delay(_options.PollingInterval, stoppingToken);
-        }
-
-        _logger.LogInformation("Moonraker printer sync job shutting down");
-    }
-}

backend/Dockerfile

@@ -17,9 +17,6 @@ RUN dotnet publish Extrudex.csproj \
 FROM mcr.microsoft.com/dotnet/aspnet:9.0 AS runtime
 WORKDIR /app
 
-# Install curl for health check (not included in aspnet base image)
-RUN apt-get update && apt-get install -y --no-install-recommends curl && rm -rf /var/lib/apt/lists/*
-
 # Non-root user for security
 RUN adduser --disabled-password --gecos "" appuser
 USER appuser

backend/Domain/Entities/UsageLog.cs

@@ -1,72 +0,0 @@
-using Extrudex.Domain.Base;
-using Extrudex.Domain.Enums;
-
-namespace Extrudex.Domain.Entities;
-
-/// <summary>
-/// Represents a single filament usage log entry. Records how much filament
-/// was consumed, by which printer, at what time, and optionally linked to
-/// a print job. This provides a fine-grained audit trail of filament consumption
-/// independent of print job lifecycle.
-/// </summary>
-public class UsageLog : AuditableEntity
-{
-    /// <summary>
-    /// Foreign key to the spool that provided the filament.
-    /// </summary>
-    public Guid SpoolId { get; set; }
-
-    /// <summary>
-    /// Navigation to the spool that provided the filament.
-    /// </summary>
-    public Spool Spool { get; set; } = null!;
-
-    /// <summary>
-    /// Foreign key to the printer that consumed the filament.
-    /// Nullable to support manual entries without a specific printer.
-    /// </summary>
-    public Guid? PrinterId { get; set; }
-
-    /// <summary>
-    /// Navigation to the printer that consumed the filament.
-    /// </summary>
-    public Printer? Printer { get; set; }
-
-    /// <summary>
-    /// Foreign key to the print job associated with this usage entry.
-    /// Nullable because usage can be logged before or without a print job.
-    /// </summary>
-    public Guid? PrintJobId { get; set; }
-
-    /// <summary>
-    /// Navigation to the print job associated with this usage entry.
-    /// </summary>
-    public PrintJob? PrintJob { get; set; }
-
-    /// <summary>
-    /// The number of grams of filament consumed in this usage event.
-    /// </summary>
-    public decimal GramsUsed { get; set; }
-
-    /// <summary>
-    /// The number of millimeters of filament extruded in this usage event.
-    /// Optional — may not be available for all data sources.
-    /// </summary>
-    public decimal? MmExtruded { get; set; }
-
-    /// <summary>
-    /// Timestamp when the usage occurred (UTC). This is the actual time of
-    /// consumption, which may differ from CreatedAt if the entry was recorded later.
-    /// </summary>
-    public DateTime UsageTimestamp { get; set; } = DateTime.UtcNow;
-
-    /// <summary>
-    /// The source of the usage data (which integration path provided it).
-    /// </summary>
-    public DataSource DataSource { get; set; } = DataSource.Manual;
-
-    /// <summary>
-    /// Optional notes about this usage entry.
-    /// </summary>
-    public string? Notes { get; set; }
-}

backend/Domain/Interfaces/ICostPerPrintService.cs

@@ -1,76 +0,0 @@
-namespace Extrudex.Domain.Interfaces;
-
-/// <summary>
-/// Service interface for calculating the cost of goods sold (COGS) per print job.
-/// Uses the spool's purchase price and the print job's derived grams consumed
-/// to produce a cost breakdown. Handles missing cost data gracefully by returning
-/// warnings rather than throwing exceptions.
-/// </summary>
-public interface ICostPerPrintService
-{
-    /// <summary>
-    /// Calculates the cost per print for a specific print job.
-    /// </summary>
-    /// <param name="printJobId">The unique identifier of the print job.</param>
-    /// <param name="cancellationToken">Optional cancellation token.</param>
-    /// <returns>
-    /// A <see cref="CostPerPrintResult"/> containing the cost breakdown,
-    /// or warnings if cost data is missing or incomplete.
-    /// </returns>
-    Task<CostPerPrintResult> CalculateAsync(Guid printJobId, CancellationToken cancellationToken = default);
-
-    /// <summary>
-    /// Calculates cost breakdowns for all print jobs associated with a specific spool.
-    /// Useful for spool-level COGS reporting.
-    /// </summary>
-    /// <param name="spoolId">The unique identifier of the spool.</param>
-    /// <param name="cancellationToken">Optional cancellation token.</param>
-    /// <returns>
-    /// A list of <see cref="CostPerPrintResult"/> for each print job on the spool.
-    /// Jobs with missing cost data will include warnings.
-    /// </returns>
-    Task<IReadOnlyList<CostPerPrintResult>> CalculateBySpoolAsync(Guid spoolId, CancellationToken cancellationToken = default);
-}
-
-/// <summary>
-/// Result of a cost-per-print calculation. Contains the cost breakdown
-/// and any warnings about missing or incomplete cost data.
-/// </summary>
-public class CostPerPrintResult
-{
-    /// <summary>The print job identifier this result belongs to.</summary>
-    public Guid PrintJobId { get; set; }
-
-    /// <summary>Human-readable name of the print job.</summary>
-    public string PrintName { get; set; } = string.Empty;
-
-    /// <summary>The spool identifier that provided filament.</summary>
-    public Guid SpoolId { get; set; }
-
-    /// <summary>Serial number of the spool.</summary>
-    public string SpoolSerial { get; set; } = string.Empty;
-
-    /// <summary>Total millimeters of filament extruded.</summary>
-    public decimal MmExtruded { get; set; }
-
-    /// <summary>Derived grams consumed for this print.</summary>
-    public decimal GramsDerived { get; set; }
-
-    /// <summary>The spool's purchase price. Null if not recorded.</summary>
-    public decimal? PurchasePrice { get; set; }
-
-    /// <summary>The spool's total weight in grams when full.</summary>
-    public decimal? WeightTotalGrams { get; set; }
-
-    /// <summary>Cost per gram of filament. Null if purchase price or total weight is missing.</summary>
-    public decimal? CostPerGram { get; set; }
-
-    /// <summary>Calculated cost of this print job. Null if cost data is incomplete.</summary>
-    public decimal? CostPerPrint { get; set; }
-
-    /// <summary>
-    /// Warnings about missing or incomplete data that prevented a full calculation.
-    /// Empty when all data is available and the calculation succeeded.
-    /// </summary>
-    public List<string> Warnings { get; set; } = new();
-}

backend/Domain/Interfaces/IFilamentUsageService.cs

@@ -0,0 +1,50 @@
+using Extrudex.Domain.Entities;
+
+namespace Extrudex.Domain.Interfaces;
+
+/// <summary>
+/// Service for persisting and querying filament usage records.
+/// Tracks consumption per print job and per spool for COGS and inventory tracking.
+/// </summary>
+public interface IFilamentUsageService
+{
+    /// <summary>
+    /// Records a new filament usage entry for a print job.
+    /// </summary>
+    /// <param name="printJobId">The print job that consumed the filament.</param>
+    /// <param name="spoolId">The spool that provided the filament.</param>
+    /// <param name="printerId">The printer that executed the print.</param>
+    /// <param name="gramsUsed">Grams of filament consumed.</param>
+    /// <param name="mmExtruded">Millimeters of filament extruded.</param>
+    /// <param name="notes">Optional notes about this usage record.</param>
+    /// <param name="cancellationToken">Cancellation token.</param>
+    /// <returns>The created FilamentUsage entity.</returns>
+    Task<FilamentUsage> RecordUsageAsync(
+        Guid printJobId,
+        Guid spoolId,
+        Guid printerId,
+        decimal gramsUsed,
+        decimal mmExtruded,
+        string? notes = null,
+        CancellationToken cancellationToken = default);
+
+    /// <summary>
+    /// Retrieves all filament usage records for a specific print job.
+    /// </summary>
+    /// <param name="printJobId">The print job ID.</param>
+    /// <param name="cancellationToken">Cancellation token.</param>
+    /// <returns>Collection of filament usage records for the print job.</returns>
+    Task<IReadOnlyList<FilamentUsage>> GetByPrintJobAsync(
+        Guid printJobId,
+        CancellationToken cancellationToken = default);
+
+    /// <summary>
+    /// Retrieves all filament usage records for a specific spool.
+    /// </summary>
+    /// <param name="spoolId">The spool ID.</param>
+    /// <param name="cancellationToken">Cancellation token.</param>
+    /// <returns>Collection of filament usage records for the spool.</returns>
+    Task<IReadOnlyList<FilamentUsage>> GetBySpoolAsync(
+        Guid spoolId,
+        CancellationToken cancellationToken = default);
+}

backend/Domain/Interfaces/IFilamentUsageSyncService.cs

@@ -1,19 +0,0 @@
-namespace Extrudex.Domain.Interfaces;
-
-/// <summary>
-/// Service interface for syncing filament usage data from printers
-/// into the Extrudex database. Handles querying Moonraker printers,
-/// computing derived usage metrics, and persisting updates to spools
-/// and print job records.
-/// </summary>
-public interface IFilamentUsageSyncService
-{
-    /// <summary>
-    /// Performs a single sync cycle: queries all active Moonraker printers,
-    /// fetches their current filament usage data, and persists updates to
-    /// the database.
-    /// </summary>
-    /// <param name="cancellationToken">Cancellation token for graceful shutdown.</param>
-    /// <returns>The number of printers successfully synced.</returns>
-    Task<int> SyncAllAsync(CancellationToken cancellationToken = default);
-}

backend/Domain/Interfaces/ILowStockDetector.cs

@@ -1,39 +0,0 @@
-namespace Extrudex.Domain.Interfaces;
-
-/// <summary>
-/// Detects low-stock filament spools based on configurable weight thresholds.
-/// Determines whether a spool's remaining filament falls below a critical level
-/// so that alerts and API flags can be surfaced to the user.
-/// </summary>
-public interface ILowStockDetector
-{
-    /// <summary>
-    /// Determines whether a spool is considered low stock based on its remaining
-    /// weight relative to its total weight and the configured threshold percentage.
-    /// </summary>
-    /// <param name="weightRemainingGrams">The current remaining weight in grams.</param>
-    /// <param name="weightTotalGrams">The total spool weight in grams when full.</param>
-    /// <returns>
-    /// <c>true</c> if the remaining weight percentage is at or below the configured
-    /// low-stock threshold; <c>false</c> otherwise. Returns <c>false</c> for spools
-    /// with zero total weight to avoid division-by-zero.
-    /// </returns>
-    bool IsLowStock(decimal weightRemainingGrams, decimal weightTotalGrams);
-
-    /// <summary>
-    /// Calculates the remaining weight as a percentage of total weight.
-    /// </summary>
-    /// <param name="weightRemainingGrams">The current remaining weight in grams.</param>
-    /// <param name="weightTotalGrams">The total spool weight in grams when full.</param>
-    /// <returns>
-    /// A value between 0 and 100 representing the percentage of filament remaining.
-    /// Returns 0 if total weight is zero to avoid division-by-zero.
-    /// </returns>
-    decimal GetRemainingWeightPercent(decimal weightRemainingGrams, decimal weightTotalGrams);
-
-    /// <summary>
-    /// Gets the currently configured low-stock threshold percentage.
-    /// Useful for API responses so clients know what threshold is in effect.
-    /// </summary>
-    decimal LowStockThresholdPercent { get; }
-}

backend/Domain/Interfaces/IMoonrakerPrinterSyncService.cs

@@ -1,20 +0,0 @@
-using Extrudex.Domain.DTOs.Moonraker;
-
-namespace Extrudex.Domain.Interfaces;
-
-/// <summary>
-/// Service interface for syncing Moonraker printer data into the Extrudex database.
-/// Handles periodic polling of printer status and mapping print job history
-/// to PrintJob and FilamentUsage entities.
-/// </summary>
-public interface IMoonrakerPrinterSyncService
-{
-    /// <summary>
-    /// Performs a single sync cycle: queries all active Moonraker printers,
-    /// fetches their current status and print job history, and persists
-    /// updates to the database.
-    /// </summary>
-    /// <param name="cancellationToken">Cancellation token for graceful shutdown.</param>
-    /// <returns>The number of printers successfully synced.</returns>
-    Task<int> SyncAllAsync(CancellationToken cancellationToken = default);
-}

backend/Domain/Interfaces/IUsageLogService.cs

@@ -1,57 +0,0 @@
-using Extrudex.Domain.Entities;
-using Extrudex.Domain.Enums;
-
-namespace Extrudex.Domain.Interfaces;
-
-/// <summary>
-/// Service for recording filament usage entries. Writes to the usage_logs table
-/// and provides query capabilities for usage history.
-/// </summary>
-public interface IUsageLogService
-{
-    /// <summary>
-    /// Records a filament usage entry.
-    /// </summary>
-    /// <param name="spoolId">The spool that provided the filament.</param>
-    /// <param name="gramsUsed">Grams of filament consumed.</param>
-    /// <param name="dataSource">Where the data came from.</param>
-    /// <param name="printerId">Optional printer ID.</param>
-    /// <param name="printJobId">Optional print job ID.</param>
-    /// <param name="mmExtruded">Optional mm extruded.</param>
-    /// <param name="usageTimestamp">When the usage occurred (defaults to UTC now).</param>
-    /// <param name="notes">Optional notes.</param>
-    /// <returns>The created UsageLog entity.</returns>
-    Task<UsageLog> RecordUsageAsync(
-        Guid spoolId,
-        decimal gramsUsed,
-        DataSource dataSource,
-        Guid? printerId = null,
-        Guid? printJobId = null,
-        decimal? mmExtruded = null,
-        DateTime? usageTimestamp = null,
-        string? notes = null);
-
-    /// <summary>
-    /// Retrieves usage logs for a specific spool, ordered by usage timestamp descending.
-    /// </summary>
-    /// <param name="spoolId">The spool ID to filter by.</param>
-    /// <param name="cancellationToken">Cancellation token.</param>
-    /// <returns>A collection of usage logs for the spool.</returns>
-    Task<IEnumerable<UsageLog>> GetBySpoolAsync(Guid spoolId, CancellationToken cancellationToken = default);
-
-    /// <summary>
-    /// Retrieves usage logs for a specific printer, ordered by usage timestamp descending.
-    /// </summary>
-    /// <param name="printerId">The printer ID to filter by.</param>
-    /// <param name="cancellationToken">Cancellation token.</param>
-    /// <returns>A collection of usage logs for the printer.</returns>
-    Task<IEnumerable<UsageLog>> GetByPrinterAsync(Guid printerId, CancellationToken cancellationToken = default);
-
-    /// <summary>
-    /// Retrieves usage logs for a specific print job, ordered by usage timestamp descending.
-    /// </summary>
-    /// <param name="printJobId">The print job ID to filter by.</param>
-    /// <param name="cancellationToken">Cancellation token.</param>
-    /// <returns>A collection of usage logs for the print job.</returns>
-    Task<IEnumerable<UsageLog>> GetByPrintJobAsync(Guid printJobId, CancellationToken cancellationToken = default);
-}

backend/Infrastructure/Configuration/FilamentUsageSyncOptions.cs

@@ -1,33 +0,0 @@
-namespace Extrudex.Infrastructure.Configuration;
-
-/// <summary>
-/// Configuration options for the FilamentUsageSync background job.
-/// Bound from appsettings.json under the "FilamentUsageSync" section.
-/// Controls polling interval and per-printer timeout settings.
-/// </summary>
-public class FilamentUsageSyncOptions
-{
-    /// <summary>
-    /// The section name in appsettings.json where these options are bound.
-    /// </summary>
-    public const string SectionName = "FilamentUsageSync";
-
-    /// <summary>
-    /// How often the background job polls printers for usage data.
-    /// Default: 5 minutes. Minimum recommended: 1 minute.
-    /// </summary>
-    public TimeSpan PollingInterval { get; set; } = TimeSpan.FromMinutes(5);
-
-    /// <summary>
-    /// Timeout for individual HTTP requests to a Moonraker printer.
-    /// Default: 30 seconds.
-    /// </summary>
-    public TimeSpan RequestTimeout { get; set; } = TimeSpan.FromSeconds(30);
-
-    /// <summary>
-    /// Whether the sync job is enabled. Set to false to disable
-    /// the background job without removing its registration.
-    /// Default: true.
-    /// </summary>
-    public bool Enabled { get; set; } = true;
-}

backend/Infrastructure/Configuration/MoonrakerPrinterSyncOptions.cs

@@ -1,41 +0,0 @@
-namespace Extrudex.Infrastructure.Configuration;
-
-/// <summary>
-/// Configuration options for the MoonrakerPrinterSync background service.
-/// Bound from appsettings.json under the "MoonrakerPrinterSync" section.
-/// Controls polling interval, timeouts, and feature toggles for the
-/// printer status and print job mapping service.
-/// </summary>
-public class MoonrakerPrinterSyncOptions
-{
-    /// <summary>
-    /// The section name in appsettings.json where these options are bound.
-    /// </summary>
-    public const string SectionName = "MoonrakerPrinterSync";
-
-    /// <summary>
-    /// How often the background service polls Moonraker printers for status
-    /// and print job data. Default: 1 minute.
-    /// </summary>
-    public TimeSpan PollingInterval { get; set; } = TimeSpan.FromMinutes(1);
-
-    /// <summary>
-    /// Timeout for individual HTTP requests to a Moonraker printer.
-    /// Default: 15 seconds.
-    /// </summary>
-    public TimeSpan RequestTimeout { get; set; } = TimeSpan.FromSeconds(15);
-
-    /// <summary>
-    /// Whether the Moonraker printer sync service is enabled.
-    /// Set to false to disable without removing the service registration.
-    /// Default: true.
-    /// </summary>
-    public bool Enabled { get; set; } = true;
-
-    /// <summary>
-    /// Maximum number of print history items to fetch per printer per sync cycle.
-    /// Controls the batch size when syncing print jobs from Moonraker.
-    /// Default: 25.
-    /// </summary>
-    public int HistoryBatchSize { get; set; } = 25;
-}

backend/Infrastructure/Data/Configurations/UsageLogConfiguration.cs

@@ -1,91 +0,0 @@
-using Extrudex.Domain.Entities;
-using Extrudex.Domain.Enums;
-using Microsoft.EntityFrameworkCore;
-using Microsoft.EntityFrameworkCore.Metadata.Builders;
-
-namespace Extrudex.Infrastructure.Data.Configurations;
-
-/// <summary>
-/// EF Core configuration for the UsageLog entity.
-/// Maps to the usage_logs table with snake_case columns and appropriate indexes.
-/// </summary>
-public class UsageLogConfiguration : BaseEntityConfiguration<UsageLog>
-{
-    /// <inheritdoc/>
-    public override void Configure(EntityTypeBuilder<UsageLog> builder)
-    {
-        base.Configure(builder);
-
-        builder.Property(e => e.SpoolId)
-            .HasColumnName("spool_id")
-            .IsRequired();
-
-        builder.Property(e => e.PrinterId)
-            .HasColumnName("printer_id");
-
-        builder.Property(e => e.PrintJobId)
-            .HasColumnName("print_job_id");
-
-        builder.Property(e => e.GramsUsed)
-            .HasColumnName("grams_used")
-            .HasPrecision(10, 2)
-            .IsRequired();
-
-        builder.Property(e => e.MmExtruded)
-            .HasColumnName("mm_extruded")
-            .HasPrecision(12, 2);
-
-        builder.Property(e => e.UsageTimestamp)
-            .HasColumnName("usage_timestamp")
-            .IsRequired();
-
-        builder.Property(e => e.DataSource)
-            .HasColumnName("data_source")
-            .HasConversion<string>()
-            .HasMaxLength(50)
-            .IsRequired();
-
-        builder.Property(e => e.Notes)
-            .HasColumnName("notes")
-            .HasMaxLength(2000);
-
-        // Index on spool_id for querying usage by spool
-        builder.HasIndex(e => e.SpoolId)
-            .HasDatabaseName("ix_usage_logs_spool_id");
-
-        // Index on printer_id for querying usage by printer
-        builder.HasIndex(e => e.PrinterId)
-            .HasDatabaseName("ix_usage_logs_printer_id");
-
-        // Index on print_job_id for querying usage by print job
-        builder.HasIndex(e => e.PrintJobId)
-            .HasDatabaseName("ix_usage_logs_print_job_id");
-
-        // Index on usage_timestamp for chronological queries
-        builder.HasIndex(e => e.UsageTimestamp)
-            .HasDatabaseName("ix_usage_logs_usage_timestamp");
-
-        // Index on data_source for filtering by integration path
-        builder.HasIndex(e => e.DataSource)
-            .HasDatabaseName("ix_usage_logs_data_source");
-
-        // Relationships
-        builder.HasOne(e => e.Spool)
-            .WithMany()
-            .HasForeignKey(e => e.SpoolId)
-            .HasConstraintName("fk_usage_logs_spool")
-            .OnDelete(DeleteBehavior.Restrict);
-
-        builder.HasOne(e => e.Printer)
-            .WithMany()
-            .HasForeignKey(e => e.PrinterId)
-            .HasConstraintName("fk_usage_logs_printer")
-            .OnDelete(DeleteBehavior.SetNull);
-
-        builder.HasOne(e => e.PrintJob)
-            .WithMany()
-            .HasForeignKey(e => e.PrintJobId)
-            .HasConstraintName("fk_usage_logs_print_job")
-            .OnDelete(DeleteBehavior.SetNull);
-    }
-}

backend/Infrastructure/Data/ExtrudexDbContext.cs

@@ -24,7 +24,6 @@ public class ExtrudexDbContext : DbContext
     public DbSet<AmsSlot> AmsSlots => Set<AmsSlot>();
     public DbSet<PrintJob> PrintJobs => Set<PrintJob>();
     public DbSet<FilamentUsage> FilamentUsages => Set<FilamentUsage>();
-    public DbSet<UsageLog> UsageLogs => Set<UsageLog>();
 
     protected override void OnModelCreating(ModelBuilder modelBuilder)
     {

backend/Infrastructure/Data/Migrations/20260426184329_AddUsageLogTable.cs

@@ -1,534 +0,0 @@
-using System;
-using Microsoft.EntityFrameworkCore.Migrations;
-
-#nullable disable
-
-namespace Extrudex.Infrastructure.Data.Migrations
-{
-    /// <inheritdoc />
-    public partial class AddUsageLogTable : Migration
-    {
-        /// <inheritdoc />
-        protected override void Up(MigrationBuilder migrationBuilder)
-        {
-            migrationBuilder.CreateTable(
-                name: "usage_logs",
-                columns: table => new
-                {
-                    id = table.Column<Guid>(type: "uuid", nullable: false),
-                    spool_id = table.Column<Guid>(type: "uuid", nullable: false),
-                    printer_id = table.Column<Guid>(type: "uuid", nullable: true),
-                    print_job_id = table.Column<Guid>(type: "uuid", nullable: true),
-                    grams_used = table.Column<decimal>(type: "numeric(10,2)", precision: 10, scale: 2, nullable: false),
-                    mm_extruded = table.Column<decimal>(type: "numeric(12,2)", precision: 12, scale: 2, nullable: true),
-                    usage_timestamp = table.Column<DateTime>(type: "timestamp with time zone", nullable: false),
-                    data_source = table.Column<string>(type: "character varying(50)", maxLength: 50, nullable: false),
-                    notes = table.Column<string>(type: "character varying(2000)", maxLength: 2000, nullable: true),
-                    created_at = table.Column<DateTime>(type: "timestamp with time zone", nullable: false, defaultValueSql: "now() at time zone 'utc'"),
-                    updated_at = table.Column<DateTime>(type: "timestamp with time zone", nullable: false, defaultValueSql: "now() at time zone 'utc'")
-                },
-                constraints: table =>
-                {
-                    table.PrimaryKey("PK_usage_logs", x => x.id);
-                    table.ForeignKey(
-                        name: "fk_usage_logs_print_job",
-                        column: x => x.print_job_id,
-                        principalTable: "print_jobs",
-                        principalColumn: "id",
-                        onDelete: ReferentialAction.SetNull);
-                    table.ForeignKey(
-                        name: "fk_usage_logs_printer",
-                        column: x => x.printer_id,
-                        principalTable: "printers",
-                        principalColumn: "id",
-                        onDelete: ReferentialAction.SetNull);
-                    table.ForeignKey(
-                        name: "fk_usage_logs_spool",
-                        column: x => x.spool_id,
-                        principalTable: "spools",
-                        principalColumn: "id",
-                        onDelete: ReferentialAction.Restrict);
-                });
-
-            migrationBuilder.UpdateData(
-                table: "material_bases",
-                keyColumn: "id",
-                keyValue: new Guid("10000000-0000-0000-0000-000000000001"),
-                columns: new[] { "created_at", "updated_at" },
-                values: new object[] { new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(6535), new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(6535) });
-
-            migrationBuilder.UpdateData(
-                table: "material_bases",
-                keyColumn: "id",
-                keyValue: new Guid("10000000-0000-0000-0000-000000000002"),
-                columns: new[] { "created_at", "updated_at" },
-                values: new object[] { new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(7016), new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(7016) });
-
-            migrationBuilder.UpdateData(
-                table: "material_bases",
-                keyColumn: "id",
-                keyValue: new Guid("10000000-0000-0000-0000-000000000003"),
-                columns: new[] { "created_at", "updated_at" },
-                values: new object[] { new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(7027), new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(7028) });
-
-            migrationBuilder.UpdateData(
-                table: "material_bases",
-                keyColumn: "id",
-                keyValue: new Guid("10000000-0000-0000-0000-000000000004"),
-                columns: new[] { "created_at", "updated_at" },
-                values: new object[] { new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(7034), new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(7035) });
-
-            migrationBuilder.UpdateData(
-                table: "material_bases",
-                keyColumn: "id",
-                keyValue: new Guid("10000000-0000-0000-0000-000000000005"),
-                columns: new[] { "created_at", "updated_at" },
-                values: new object[] { new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(7042), new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(7042) });
-
-            migrationBuilder.UpdateData(
-                table: "material_bases",
-                keyColumn: "id",
-                keyValue: new Guid("10000000-0000-0000-0000-000000000006"),
-                columns: new[] { "created_at", "updated_at" },
-                values: new object[] { new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(7049), new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(7049) });
-
-            migrationBuilder.UpdateData(
-                table: "material_finishes",
-                keyColumn: "id",
-                keyValue: new Guid("20000000-0000-0000-0000-000000000001"),
-                columns: new[] { "created_at", "updated_at" },
-                values: new object[] { new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(7291), new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(7292) });
-
-            migrationBuilder.UpdateData(
-                table: "material_finishes",
-                keyColumn: "id",
-                keyValue: new Guid("20000000-0000-0000-0000-000000000002"),
-                columns: new[] { "created_at", "updated_at" },
-                values: new object[] { new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(7453), new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(7453) });
-
-            migrationBuilder.UpdateData(
-                table: "material_finishes",
-                keyColumn: "id",
-                keyValue: new Guid("20000000-0000-0000-0000-000000000003"),
-                columns: new[] { "created_at", "updated_at" },
-                values: new object[] { new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(7461), new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(7461) });
-
-            migrationBuilder.UpdateData(
-                table: "material_finishes",
-                keyColumn: "id",
-                keyValue: new Guid("20000000-0000-0000-0000-000000000004"),
-                columns: new[] { "created_at", "updated_at" },
-                values: new object[] { new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(7468), new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(7468) });
-
-            migrationBuilder.UpdateData(
-                table: "material_finishes",
-                keyColumn: "id",
-                keyValue: new Guid("20000000-0000-0000-0000-000000000005"),
-                columns: new[] { "created_at", "updated_at" },
-                values: new object[] { new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(7474), new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(7474) });
-
-            migrationBuilder.UpdateData(
-                table: "material_finishes",
-                keyColumn: "id",
-                keyValue: new Guid("20000000-0000-0000-0000-000000000006"),
-                columns: new[] { "created_at", "updated_at" },
-                values: new object[] { new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(7480), new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(7481) });
-
-            migrationBuilder.UpdateData(
-                table: "material_finishes",
-                keyColumn: "id",
-                keyValue: new Guid("20000000-0000-0000-0000-000000000007"),
-                columns: new[] { "created_at", "updated_at" },
-                values: new object[] { new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(7487), new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(7487) });
-
-            migrationBuilder.UpdateData(
-                table: "material_finishes",
-                keyColumn: "id",
-                keyValue: new Guid("20000000-0000-0000-0000-000000000008"),
-                columns: new[] { "created_at", "updated_at" },
-                values: new object[] { new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(7493), new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(7493) });
-
-            migrationBuilder.UpdateData(
-                table: "material_finishes",
-                keyColumn: "id",
-                keyValue: new Guid("20000000-0000-0000-0000-000000000009"),
-                columns: new[] { "created_at", "updated_at" },
-                values: new object[] { new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(7500), new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(7500) });
-
-            migrationBuilder.UpdateData(
-                table: "material_finishes",
-                keyColumn: "id",
-                keyValue: new Guid("20000000-0000-0000-0000-000000000010"),
-                columns: new[] { "created_at", "updated_at" },
-                values: new object[] { new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(7507), new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(7507) });
-
-            migrationBuilder.UpdateData(
-                table: "material_finishes",
-                keyColumn: "id",
-                keyValue: new Guid("20000000-0000-0000-0000-000000000011"),
-                columns: new[] { "created_at", "updated_at" },
-                values: new object[] { new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(7513), new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(7513) });
-
-            migrationBuilder.UpdateData(
-                table: "material_finishes",
-                keyColumn: "id",
-                keyValue: new Guid("20000000-0000-0000-0000-000000000012"),
-                columns: new[] { "created_at", "updated_at" },
-                values: new object[] { new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(7519), new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(7520) });
-
-            migrationBuilder.UpdateData(
-                table: "material_finishes",
-                keyColumn: "id",
-                keyValue: new Guid("20000000-0000-0000-0000-000000000013"),
-                columns: new[] { "created_at", "updated_at" },
-                values: new object[] { new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(7526), new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(7526) });
-
-            migrationBuilder.UpdateData(
-                table: "material_finishes",
-                keyColumn: "id",
-                keyValue: new Guid("20000000-0000-0000-0000-000000000014"),
-                columns: new[] { "created_at", "updated_at" },
-                values: new object[] { new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(7532), new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(7532) });
-
-            migrationBuilder.UpdateData(
-                table: "material_finishes",
-                keyColumn: "id",
-                keyValue: new Guid("20000000-0000-0000-0000-000000000015"),
-                columns: new[] { "created_at", "updated_at" },
-                values: new object[] { new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(7538), new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(7539) });
-
-            migrationBuilder.UpdateData(
-                table: "material_modifiers",
-                keyColumn: "id",
-                keyValue: new Guid("30000000-0000-0000-0000-000000000001"),
-                columns: new[] { "created_at", "updated_at" },
-                values: new object[] { new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(7690), new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(7690) });
-
-            migrationBuilder.UpdateData(
-                table: "material_modifiers",
-                keyColumn: "id",
-                keyValue: new Guid("30000000-0000-0000-0000-000000000002"),
-                columns: new[] { "created_at", "updated_at" },
-                values: new object[] { new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(7838), new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(7838) });
-
-            migrationBuilder.UpdateData(
-                table: "material_modifiers",
-                keyColumn: "id",
-                keyValue: new Guid("30000000-0000-0000-0000-000000000003"),
-                columns: new[] { "created_at", "updated_at" },
-                values: new object[] { new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(7846), new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(7846) });
-
-            migrationBuilder.UpdateData(
-                table: "material_modifiers",
-                keyColumn: "id",
-                keyValue: new Guid("30000000-0000-0000-0000-000000000004"),
-                columns: new[] { "created_at", "updated_at" },
-                values: new object[] { new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(7853), new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(7853) });
-
-            migrationBuilder.UpdateData(
-                table: "material_modifiers",
-                keyColumn: "id",
-                keyValue: new Guid("30000000-0000-0000-0000-000000000005"),
-                columns: new[] { "created_at", "updated_at" },
-                values: new object[] { new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(7859), new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(7859) });
-
-            migrationBuilder.UpdateData(
-                table: "material_modifiers",
-                keyColumn: "id",
-                keyValue: new Guid("30000000-0000-0000-0000-000000000006"),
-                columns: new[] { "created_at", "updated_at" },
-                values: new object[] { new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(7865), new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(7866) });
-
-            migrationBuilder.UpdateData(
-                table: "material_modifiers",
-                keyColumn: "id",
-                keyValue: new Guid("30000000-0000-0000-0000-000000000007"),
-                columns: new[] { "created_at", "updated_at" },
-                values: new object[] { new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(7872), new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(7872) });
-
-            migrationBuilder.UpdateData(
-                table: "material_modifiers",
-                keyColumn: "id",
-                keyValue: new Guid("30000000-0000-0000-0000-000000000008"),
-                columns: new[] { "created_at", "updated_at" },
-                values: new object[] { new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(7878), new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(7879) });
-
-            migrationBuilder.UpdateData(
-                table: "material_modifiers",
-                keyColumn: "id",
-                keyValue: new Guid("30000000-0000-0000-0000-000000000009"),
-                columns: new[] { "created_at", "updated_at" },
-                values: new object[] { new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(7885), new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(7885) });
-
-            migrationBuilder.UpdateData(
-                table: "material_modifiers",
-                keyColumn: "id",
-                keyValue: new Guid("30000000-0000-0000-0000-000000000010"),
-                columns: new[] { "created_at", "updated_at" },
-                values: new object[] { new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(7891), new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(7891) });
-
-            migrationBuilder.UpdateData(
-                table: "material_modifiers",
-                keyColumn: "id",
-                keyValue: new Guid("30000000-0000-0000-0000-000000000011"),
-                columns: new[] { "created_at", "updated_at" },
-                values: new object[] { new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(7898), new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(7898) });
-
-            migrationBuilder.CreateIndex(
-                name: "ix_usage_logs_data_source",
-                table: "usage_logs",
-                column: "data_source");
-
-            migrationBuilder.CreateIndex(
-                name: "ix_usage_logs_print_job_id",
-                table: "usage_logs",
-                column: "print_job_id");
-
-            migrationBuilder.CreateIndex(
-                name: "ix_usage_logs_printer_id",
-                table: "usage_logs",
-                column: "printer_id");
-
-            migrationBuilder.CreateIndex(
-                name: "ix_usage_logs_spool_id",
-                table: "usage_logs",
-                column: "spool_id");
-
-            migrationBuilder.CreateIndex(
-                name: "ix_usage_logs_usage_timestamp",
-                table: "usage_logs",
-                column: "usage_timestamp");
-        }
-
-        /// <inheritdoc />
-        protected override void Down(MigrationBuilder migrationBuilder)
-        {
-            migrationBuilder.DropTable(
-                name: "usage_logs");
-
-            migrationBuilder.UpdateData(
-                table: "material_bases",
-                keyColumn: "id",
-                keyValue: new Guid("10000000-0000-0000-0000-000000000001"),
-                columns: new[] { "created_at", "updated_at" },
-                values: new object[] { new DateTime(2026, 4, 26, 13, 14, 18, 745, DateTimeKind.Utc).AddTicks(1096), new DateTime(2026, 4, 26, 13, 14, 18, 745, DateTimeKind.Utc).AddTicks(1096) });
-
-            migrationBuilder.UpdateData(
-                table: "material_bases",
-                keyColumn: "id",
-                keyValue: new Guid("10000000-0000-0000-0000-000000000002"),
-                columns: new[] { "created_at", "updated_at" },
-                values: new object[] { new DateTime(2026, 4, 26, 13, 14, 18, 745, DateTimeKind.Utc).AddTicks(1620), new DateTime(2026, 4, 26, 13, 14, 18, 745, DateTimeKind.Utc).AddTicks(1620) });
-
-            migrationBuilder.UpdateData(
-                table: "material_bases",
-                keyColumn: "id",
-                keyValue: new Guid("10000000-0000-0000-0000-000000000003"),
-                columns: new[] { "created_at", "updated_at" },
-                values: new object[] { new DateTime(2026, 4, 26, 13, 14, 18, 745, DateTimeKind.Utc).AddTicks(1630), new DateTime(2026, 4, 26, 13, 14, 18, 745, DateTimeKind.Utc).AddTicks(1630) });
-
-            migrationBuilder.UpdateData(
-                table: "material_bases",
-                keyColumn: "id",
-                keyValue: new Guid("10000000-0000-0000-0000-000000000004"),
-                columns: new[] { "created_at", "updated_at" },
-                values: new object[] { new DateTime(2026, 4, 26, 13, 14, 18, 745, DateTimeKind.Utc).AddTicks(1638), new DateTime(2026, 4, 26, 13, 14, 18, 745, DateTimeKind.Utc).AddTicks(1638) });
-
-            migrationBuilder.UpdateData(
-                table: "material_bases",
-                keyColumn: "id",
-                keyValue: new Guid("10000000-0000-0000-0000-000000000005"),
-                columns: new[] { "created_at", "updated_at" },
-                values: new object[] { new DateTime(2026, 4, 26, 13, 14, 18, 745, DateTimeKind.Utc).AddTicks(1645), new DateTime(2026, 4, 26, 13, 14, 18, 745, DateTimeKind.Utc).AddTicks(1645) });
-
-            migrationBuilder.UpdateData(
-                table: "material_bases",
-                keyColumn: "id",
-                keyValue: new Guid("10000000-0000-0000-0000-000000000006"),
-                columns: new[] { "created_at", "updated_at" },
-                values: new object[] { new DateTime(2026, 4, 26, 13, 14, 18, 745, DateTimeKind.Utc).AddTicks(1651), new DateTime(2026, 4, 26, 13, 14, 18, 745, DateTimeKind.Utc).AddTicks(1652) });
-
-            migrationBuilder.UpdateData(
-                table: "material_finishes",
-                keyColumn: "id",
-                keyValue: new Guid("20000000-0000-0000-0000-000000000001"),
-                columns: new[] { "created_at", "updated_at" },
-                values: new object[] { new DateTime(2026, 4, 26, 13, 14, 18, 745, DateTimeKind.Utc).AddTicks(1850), new DateTime(2026, 4, 26, 13, 14, 18, 745, DateTimeKind.Utc).AddTicks(1850) });
-
-            migrationBuilder.UpdateData(
-                table: "material_finishes",
-                keyColumn: "id",
-                keyValue: new Guid("20000000-0000-0000-0000-000000000002"),
-                columns: new[] { "created_at", "updated_at" },
-                values: new object[] { new DateTime(2026, 4, 26, 13, 14, 18, 745, DateTimeKind.Utc).AddTicks(2041), new DateTime(2026, 4, 26, 13, 14, 18, 745, DateTimeKind.Utc).AddTicks(2041) });
-
-            migrationBuilder.UpdateData(
-                table: "material_finishes",
-                keyColumn: "id",
-                keyValue: new Guid("20000000-0000-0000-0000-000000000003"),
-                columns: new[] { "created_at", "updated_at" },
-                values: new object[] { new DateTime(2026, 4, 26, 13, 14, 18, 745, DateTimeKind.Utc).AddTicks(2049), new DateTime(2026, 4, 26, 13, 14, 18, 745, DateTimeKind.Utc).AddTicks(2049) });
-
-            migrationBuilder.UpdateData(
-                table: "material_finishes",
-                keyColumn: "id",
-                keyValue: new Guid("20000000-0000-0000-0000-000000000004"),
-                columns: new[] { "created_at", "updated_at" },
-                values: new object[] { new DateTime(2026, 4, 26, 13, 14, 18, 745, DateTimeKind.Utc).AddTicks(2055), new DateTime(2026, 4, 26, 13, 14, 18, 745, DateTimeKind.Utc).AddTicks(2056) });
-
-            migrationBuilder.UpdateData(
-                table: "material_finishes",
-                keyColumn: "id",
-                keyValue: new Guid("20000000-0000-0000-0000-000000000005"),
-                columns: new[] { "created_at", "updated_at" },
-                values: new object[] { new DateTime(2026, 4, 26, 13, 14, 18, 745, DateTimeKind.Utc).AddTicks(2062), new DateTime(2026, 4, 26, 13, 14, 18, 745, DateTimeKind.Utc).AddTicks(2062) });
-
-            migrationBuilder.UpdateData(
-                table: "material_finishes",
-                keyColumn: "id",
-                keyValue: new Guid("20000000-0000-0000-0000-000000000006"),
-                columns: new[] { "created_at", "updated_at" },
-                values: new object[] { new DateTime(2026, 4, 26, 13, 14, 18, 745, DateTimeKind.Utc).AddTicks(2068), new DateTime(2026, 4, 26, 13, 14, 18, 745, DateTimeKind.Utc).AddTicks(2068) });
-
-            migrationBuilder.UpdateData(
-                table: "material_finishes",
-                keyColumn: "id",
-                keyValue: new Guid("20000000-0000-0000-0000-000000000007"),
-                columns: new[] { "created_at", "updated_at" },
-                values: new object[] { new DateTime(2026, 4, 26, 13, 14, 18, 745, DateTimeKind.Utc).AddTicks(2075), new DateTime(2026, 4, 26, 13, 14, 18, 745, DateTimeKind.Utc).AddTicks(2075) });
-
-            migrationBuilder.UpdateData(
-                table: "material_finishes",
-                keyColumn: "id",
-                keyValue: new Guid("20000000-0000-0000-0000-000000000008"),
-                columns: new[] { "created_at", "updated_at" },
-                values: new object[] { new DateTime(2026, 4, 26, 13, 14, 18, 745, DateTimeKind.Utc).AddTicks(2081), new DateTime(2026, 4, 26, 13, 14, 18, 745, DateTimeKind.Utc).AddTicks(2081) });
-
-            migrationBuilder.UpdateData(
-                table: "material_finishes",
-                keyColumn: "id",
-                keyValue: new Guid("20000000-0000-0000-0000-000000000009"),
-                columns: new[] { "created_at", "updated_at" },
-                values: new object[] { new DateTime(2026, 4, 26, 13, 14, 18, 745, DateTimeKind.Utc).AddTicks(2100), new DateTime(2026, 4, 26, 13, 14, 18, 745, DateTimeKind.Utc).AddTicks(2100) });
-
-            migrationBuilder.UpdateData(
-                table: "material_finishes",
-                keyColumn: "id",
-                keyValue: new Guid("20000000-0000-0000-0000-000000000010"),
-                columns: new[] { "created_at", "updated_at" },
-                values: new object[] { new DateTime(2026, 4, 26, 13, 14, 18, 745, DateTimeKind.Utc).AddTicks(2107), new DateTime(2026, 4, 26, 13, 14, 18, 745, DateTimeKind.Utc).AddTicks(2107) });
-
-            migrationBuilder.UpdateData(
-                table: "material_finishes",
-                keyColumn: "id",
-                keyValue: new Guid("20000000-0000-0000-0000-000000000011"),
-                columns: new[] { "created_at", "updated_at" },
-                values: new object[] { new DateTime(2026, 4, 26, 13, 14, 18, 745, DateTimeKind.Utc).AddTicks(2113), new DateTime(2026, 4, 26, 13, 14, 18, 745, DateTimeKind.Utc).AddTicks(2113) });
-
-            migrationBuilder.UpdateData(
-                table: "material_finishes",
-                keyColumn: "id",
-                keyValue: new Guid("20000000-0000-0000-0000-000000000012"),
-                columns: new[] { "created_at", "updated_at" },
-                values: new object[] { new DateTime(2026, 4, 26, 13, 14, 18, 745, DateTimeKind.Utc).AddTicks(2120), new DateTime(2026, 4, 26, 13, 14, 18, 745, DateTimeKind.Utc).AddTicks(2120) });
-
-            migrationBuilder.UpdateData(
-                table: "material_finishes",
-                keyColumn: "id",
-                keyValue: new Guid("20000000-0000-0000-0000-000000000013"),
-                columns: new[] { "created_at", "updated_at" },
-                values: new object[] { new DateTime(2026, 4, 26, 13, 14, 18, 745, DateTimeKind.Utc).AddTicks(2126), new DateTime(2026, 4, 26, 13, 14, 18, 745, DateTimeKind.Utc).AddTicks(2126) });
-
-            migrationBuilder.UpdateData(
-                table: "material_finishes",
-                keyColumn: "id",
-                keyValue: new Guid("20000000-0000-0000-0000-000000000014"),
-                columns: new[] { "created_at", "updated_at" },
-                values: new object[] { new DateTime(2026, 4, 26, 13, 14, 18, 745, DateTimeKind.Utc).AddTicks(2132), new DateTime(2026, 4, 26, 13, 14, 18, 745, DateTimeKind.Utc).AddTicks(2133) });
-
-            migrationBuilder.UpdateData(
-                table: "material_finishes",
-                keyColumn: "id",
-                keyValue: new Guid("20000000-0000-0000-0000-000000000015"),
-                columns: new[] { "created_at", "updated_at" },
-                values: new object[] { new DateTime(2026, 4, 26, 13, 14, 18, 745, DateTimeKind.Utc).AddTicks(2139), new DateTime(2026, 4, 26, 13, 14, 18, 745, DateTimeKind.Utc).AddTicks(2139) });
-
-            migrationBuilder.UpdateData(
-                table: "material_modifiers",
-                keyColumn: "id",
-                keyValue: new Guid("30000000-0000-0000-0000-000000000001"),
-                columns: new[] { "created_at", "updated_at" },
-                values: new object[] { new DateTime(2026, 4, 26, 13, 14, 18, 745, DateTimeKind.Utc).AddTicks(2304), new DateTime(2026, 4, 26, 13, 14, 18, 745, DateTimeKind.Utc).AddTicks(2304) });
-
-            migrationBuilder.UpdateData(
-                table: "material_modifiers",
-                keyColumn: "id",
-                keyValue: new Guid("30000000-0000-0000-0000-000000000002"),
-                columns: new[] { "created_at", "updated_at" },
-                values: new object[] { new DateTime(2026, 4, 26, 13, 14, 18, 745, DateTimeKind.Utc).AddTicks(2463), new DateTime(2026, 4, 26, 13, 14, 18, 745, DateTimeKind.Utc).AddTicks(2463) });
-
-            migrationBuilder.UpdateData(
-                table: "material_modifiers",
-                keyColumn: "id",
-                keyValue: new Guid("30000000-0000-0000-0000-000000000003"),
-                columns: new[] { "created_at", "updated_at" },
-                values: new object[] { new DateTime(2026, 4, 26, 13, 14, 18, 745, DateTimeKind.Utc).AddTicks(2471), new DateTime(2026, 4, 26, 13, 14, 18, 745, DateTimeKind.Utc).AddTicks(2471) });
-
-            migrationBuilder.UpdateData(
-                table: "material_modifiers",
-                keyColumn: "id",
-                keyValue: new Guid("30000000-0000-0000-0000-000000000004"),
-                columns: new[] { "created_at", "updated_at" },
-                values: new object[] { new DateTime(2026, 4, 26, 13, 14, 18, 745, DateTimeKind.Utc).AddTicks(2477), new DateTime(2026, 4, 26, 13, 14, 18, 745, DateTimeKind.Utc).AddTicks(2478) });
-
-            migrationBuilder.UpdateData(
-                table: "material_modifiers",
-                keyColumn: "id",
-                keyValue: new Guid("30000000-0000-0000-0000-000000000005"),
-                columns: new[] { "created_at", "updated_at" },
-                values: new object[] { new DateTime(2026, 4, 26, 13, 14, 18, 745, DateTimeKind.Utc).AddTicks(2484), new DateTime(2026, 4, 26, 13, 14, 18, 745, DateTimeKind.Utc).AddTicks(2484) });
-
-            migrationBuilder.UpdateData(
-                table: "material_modifiers",
-                keyColumn: "id",
-                keyValue: new Guid("30000000-0000-0000-0000-000000000006"),
-                columns: new[] { "created_at", "updated_at" },
-                values: new object[] { new DateTime(2026, 4, 26, 13, 14, 18, 745, DateTimeKind.Utc).AddTicks(2490), new DateTime(2026, 4, 26, 13, 14, 18, 745, DateTimeKind.Utc).AddTicks(2491) });
-
-            migrationBuilder.UpdateData(
-                table: "material_modifiers",
-                keyColumn: "id",
-                keyValue: new Guid("30000000-0000-0000-0000-000000000007"),
-                columns: new[] { "created_at", "updated_at" },
-                values: new object[] { new DateTime(2026, 4, 26, 13, 14, 18, 745, DateTimeKind.Utc).AddTicks(2497), new DateTime(2026, 4, 26, 13, 14, 18, 745, DateTimeKind.Utc).AddTicks(2497) });
-
-            migrationBuilder.UpdateData(
-                table: "material_modifiers",
-                keyColumn: "id",
-                keyValue: new Guid("30000000-0000-0000-0000-000000000008"),
-                columns: new[] { "created_at", "updated_at" },
-                values: new object[] { new DateTime(2026, 4, 26, 13, 14, 18, 745, DateTimeKind.Utc).AddTicks(2503), new DateTime(2026, 4, 26, 13, 14, 18, 745, DateTimeKind.Utc).AddTicks(2503) });
-
-            migrationBuilder.UpdateData(
-                table: "material_modifiers",
-                keyColumn: "id",
-                keyValue: new Guid("30000000-0000-0000-0000-000000000009"),
-                columns: new[] { "created_at", "updated_at" },
-                values: new object[] { new DateTime(2026, 4, 26, 13, 14, 18, 745, DateTimeKind.Utc).AddTicks(2510), new DateTime(2026, 4, 26, 13, 14, 18, 745, DateTimeKind.Utc).AddTicks(2510) });
-
-            migrationBuilder.UpdateData(
-                table: "material_modifiers",
-                keyColumn: "id",
-                keyValue: new Guid("30000000-0000-0000-0000-000000000010"),
-                columns: new[] { "created_at", "updated_at" },
-                values: new object[] { new DateTime(2026, 4, 26, 13, 14, 18, 745, DateTimeKind.Utc).AddTicks(2516), new DateTime(2026, 4, 26, 13, 14, 18, 745, DateTimeKind.Utc).AddTicks(2516) });
-
-            migrationBuilder.UpdateData(
-                table: "material_modifiers",
-                keyColumn: "id",
-                keyValue: new Guid("30000000-0000-0000-0000-000000000011"),
-                columns: new[] { "created_at", "updated_at" },
-                values: new object[] { new DateTime(2026, 4, 26, 13, 14, 18, 745, DateTimeKind.Utc).AddTicks(2522), new DateTime(2026, 4, 26, 13, 14, 18, 745, DateTimeKind.Utc).AddTicks(2523) });
-        }
-    }
-}

backend/Infrastructure/Data/Migrations/ExtrudexDbContextModelSnapshot.cs

@@ -104,6 +104,77 @@ namespace Extrudex.Infrastructure.Data.Migrations
                     b.ToTable("ams_units", (string)null);
                 });
 
+            modelBuilder.Entity("Extrudex.Domain.Entities.FilamentUsage", b =>
+                {
+                    b.Property<Guid>("Id")
+                        .HasColumnType("uuid")
+                        .HasColumnName("id");
+
+                    b.Property<DateTime>("CreatedAt")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("timestamp with time zone")
+                        .HasColumnName("created_at")
+                        .HasDefaultValueSql("now() at time zone 'utc'");
+
+                    b.Property<decimal>("GramsUsed")
+                        .HasPrecision(10, 2)
+                        .HasColumnType("numeric(10,2)")
+                        .HasColumnName("grams_used");
+
+                    b.Property<decimal>("MmExtruded")
+                        .HasPrecision(12, 2)
+                        .HasColumnType("numeric(12,2)")
+                        .HasColumnName("mm_extruded");
+
+                    b.Property<string>("Notes")
+                        .HasMaxLength(2000)
+                        .HasColumnType("character varying(2000)")
+                        .HasColumnName("notes");
+
+                    b.Property<Guid>("PrintJobId")
+                        .HasColumnType("uuid")
+                        .HasColumnName("print_job_id");
+
+                    b.Property<Guid>("PrinterId")
+                        .HasColumnType("uuid")
+                        .HasColumnName("printer_id");
+
+                    b.Property<DateTime>("RecordedAt")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("timestamp with time zone")
+                        .HasColumnName("recorded_at")
+                        .HasDefaultValueSql("now() at time zone 'utc'");
+
+                    b.Property<Guid>("SpoolId")
+                        .HasColumnType("uuid")
+                        .HasColumnName("spool_id");
+
+                    b.Property<DateTime>("UpdatedAt")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("timestamp with time zone")
+                        .HasColumnName("updated_at")
+                        .HasDefaultValueSql("now() at time zone 'utc'");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("PrintJobId")
+                        .HasDatabaseName("ix_filament_usages_print_job_id");
+
+                    b.HasIndex("PrinterId")
+                        .HasDatabaseName("ix_filament_usages_printer_id");
+
+                    b.HasIndex("RecordedAt")
+                        .HasDatabaseName("ix_filament_usages_recorded_at");
+
+                    b.HasIndex("SpoolId")
+                        .HasDatabaseName("ix_filament_usages_spool_id");
+
+                    b.HasIndex("SpoolId", "RecordedAt")
+                        .HasDatabaseName("ix_filament_usages_spool_id_recorded_at");
+
+                    b.ToTable("filament_usages", (string)null);
+                });
+
             modelBuilder.Entity("Extrudex.Domain.Entities.MaterialBase", b =>
                 {
                     b.Property<Guid>("Id")
@@ -145,50 +216,50 @@ namespace Extrudex.Infrastructure.Data.Migrations
                         new
                         {
                             Id = new Guid("10000000-0000-0000-0000-000000000001"),
-                            CreatedAt = new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(6535),
+                            CreatedAt = new DateTime(2026, 4, 26, 18, 34, 33, 291, DateTimeKind.Utc).AddTicks(9388),
                             DensityGperCm3 = 1.24m,
                             Name = "PLA",
-                            UpdatedAt = new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(6535)
+                            UpdatedAt = new DateTime(2026, 4, 26, 18, 34, 33, 291, DateTimeKind.Utc).AddTicks(9388)
                         },
                         new
                         {
                             Id = new Guid("10000000-0000-0000-0000-000000000002"),
-                            CreatedAt = new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(7016),
+                            CreatedAt = new DateTime(2026, 4, 26, 18, 34, 33, 291, DateTimeKind.Utc).AddTicks(9871),
                             DensityGperCm3 = 1.27m,
                             Name = "PETG",
-                            UpdatedAt = new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(7016)
+                            UpdatedAt = new DateTime(2026, 4, 26, 18, 34, 33, 291, DateTimeKind.Utc).AddTicks(9871)
                         },
                         new
                         {
                             Id = new Guid("10000000-0000-0000-0000-000000000003"),
-                            CreatedAt = new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(7027),
+                            CreatedAt = new DateTime(2026, 4, 26, 18, 34, 33, 291, DateTimeKind.Utc).AddTicks(9881),
                             DensityGperCm3 = 1.04m,
                             Name = "ABS",
-                            UpdatedAt = new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(7028)
+                            UpdatedAt = new DateTime(2026, 4, 26, 18, 34, 33, 291, DateTimeKind.Utc).AddTicks(9881)
                         },
                         new
                         {
                             Id = new Guid("10000000-0000-0000-0000-000000000004"),
-                            CreatedAt = new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(7034),
+                            CreatedAt = new DateTime(2026, 4, 26, 18, 34, 33, 291, DateTimeKind.Utc).AddTicks(9888),
                             DensityGperCm3 = 1.07m,
                             Name = "ASA",
-                            UpdatedAt = new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(7035)
+                            UpdatedAt = new DateTime(2026, 4, 26, 18, 34, 33, 291, DateTimeKind.Utc).AddTicks(9888)
                         },
                         new
                         {
                             Id = new Guid("10000000-0000-0000-0000-000000000005"),
-                            CreatedAt = new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(7042),
+                            CreatedAt = new DateTime(2026, 4, 26, 18, 34, 33, 291, DateTimeKind.Utc).AddTicks(9895),
                             DensityGperCm3 = 1.21m,
                             Name = "TPU",
-                            UpdatedAt = new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(7042)
+                            UpdatedAt = new DateTime(2026, 4, 26, 18, 34, 33, 291, DateTimeKind.Utc).AddTicks(9895)
                         },
                         new
                         {
                             Id = new Guid("10000000-0000-0000-0000-000000000006"),
-                            CreatedAt = new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(7049),
+                            CreatedAt = new DateTime(2026, 4, 26, 18, 34, 33, 291, DateTimeKind.Utc).AddTicks(9901),
                             DensityGperCm3 = 1.14m,
                             Name = "Nylon",
-                            UpdatedAt = new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(7049)
+                            UpdatedAt = new DateTime(2026, 4, 26, 18, 34, 33, 291, DateTimeKind.Utc).AddTicks(9902)
                         });
                 });
 
@@ -232,122 +303,122 @@ namespace Extrudex.Infrastructure.Data.Migrations
                         new
                         {
                             Id = new Guid("20000000-0000-0000-0000-000000000001"),
-                            CreatedAt = new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(7291),
+                            CreatedAt = new DateTime(2026, 4, 26, 18, 34, 33, 292, DateTimeKind.Utc).AddTicks(90),
                             MaterialBaseId = new Guid("10000000-0000-0000-0000-000000000001"),
                             Name = "Basic",
-                            UpdatedAt = new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(7292)
+                            UpdatedAt = new DateTime(2026, 4, 26, 18, 34, 33, 292, DateTimeKind.Utc).AddTicks(90)
                         },
                         new
                         {
                             Id = new Guid("20000000-0000-0000-0000-000000000002"),
-                            CreatedAt = new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(7453),
+                            CreatedAt = new DateTime(2026, 4, 26, 18, 34, 33, 292, DateTimeKind.Utc).AddTicks(251),
                             MaterialBaseId = new Guid("10000000-0000-0000-0000-000000000001"),
                             Name = "Matte",
-                            UpdatedAt = new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(7453)
+                            UpdatedAt = new DateTime(2026, 4, 26, 18, 34, 33, 292, DateTimeKind.Utc).AddTicks(251)
                         },
                         new
                         {
                             Id = new Guid("20000000-0000-0000-0000-000000000003"),
-                            CreatedAt = new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(7461),
+                            CreatedAt = new DateTime(2026, 4, 26, 18, 34, 33, 292, DateTimeKind.Utc).AddTicks(259),
                             MaterialBaseId = new Guid("10000000-0000-0000-0000-000000000001"),
                             Name = "Silk",
-                            UpdatedAt = new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(7461)
+                            UpdatedAt = new DateTime(2026, 4, 26, 18, 34, 33, 292, DateTimeKind.Utc).AddTicks(259)
                         },
                         new
                         {
                             Id = new Guid("20000000-0000-0000-0000-000000000004"),
-                            CreatedAt = new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(7468),
+                            CreatedAt = new DateTime(2026, 4, 26, 18, 34, 33, 292, DateTimeKind.Utc).AddTicks(266),
                             MaterialBaseId = new Guid("10000000-0000-0000-0000-000000000001"),
                             Name = "Glitter",
-                            UpdatedAt = new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(7468)
+                            UpdatedAt = new DateTime(2026, 4, 26, 18, 34, 33, 292, DateTimeKind.Utc).AddTicks(266)
                         },
                         new
                         {
                             Id = new Guid("20000000-0000-0000-0000-000000000005"),
-                            CreatedAt = new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(7474),
+                            CreatedAt = new DateTime(2026, 4, 26, 18, 34, 33, 292, DateTimeKind.Utc).AddTicks(272),
                             MaterialBaseId = new Guid("10000000-0000-0000-0000-000000000001"),
                             Name = "Marble",
-                            UpdatedAt = new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(7474)
+                            UpdatedAt = new DateTime(2026, 4, 26, 18, 34, 33, 292, DateTimeKind.Utc).AddTicks(272)
                         },
                         new
                         {
                             Id = new Guid("20000000-0000-0000-0000-000000000006"),
-                            CreatedAt = new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(7480),
+                            CreatedAt = new DateTime(2026, 4, 26, 18, 34, 33, 292, DateTimeKind.Utc).AddTicks(278),
                             MaterialBaseId = new Guid("10000000-0000-0000-0000-000000000001"),
                             Name = "Sparkle",
-                            UpdatedAt = new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(7481)
+                            UpdatedAt = new DateTime(2026, 4, 26, 18, 34, 33, 292, DateTimeKind.Utc).AddTicks(278)
                         },
                         new
                         {
                             Id = new Guid("20000000-0000-0000-0000-000000000007"),
-                            CreatedAt = new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(7487),
+                            CreatedAt = new DateTime(2026, 4, 26, 18, 34, 33, 292, DateTimeKind.Utc).AddTicks(285),
                             MaterialBaseId = new Guid("10000000-0000-0000-0000-000000000002"),
                             Name = "Basic",
-                            UpdatedAt = new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(7487)
+                            UpdatedAt = new DateTime(2026, 4, 26, 18, 34, 33, 292, DateTimeKind.Utc).AddTicks(285)
                         },
                         new
                         {
                             Id = new Guid("20000000-0000-0000-0000-000000000008"),
-                            CreatedAt = new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(7493),
+                            CreatedAt = new DateTime(2026, 4, 26, 18, 34, 33, 292, DateTimeKind.Utc).AddTicks(291),
                             MaterialBaseId = new Guid("10000000-0000-0000-0000-000000000002"),
                             Name = "Matte",
-                            UpdatedAt = new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(7493)
+                            UpdatedAt = new DateTime(2026, 4, 26, 18, 34, 33, 292, DateTimeKind.Utc).AddTicks(291)
                         },
                         new
                         {
                             Id = new Guid("20000000-0000-0000-0000-000000000009"),
-                            CreatedAt = new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(7500),
+                            CreatedAt = new DateTime(2026, 4, 26, 18, 34, 33, 292, DateTimeKind.Utc).AddTicks(297),
                             MaterialBaseId = new Guid("10000000-0000-0000-0000-000000000002"),
                             Name = "Silk",
-                            UpdatedAt = new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(7500)
+                            UpdatedAt = new DateTime(2026, 4, 26, 18, 34, 33, 292, DateTimeKind.Utc).AddTicks(298)
                         },
                         new
                         {
                             Id = new Guid("20000000-0000-0000-0000-000000000010"),
-                            CreatedAt = new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(7507),
+                            CreatedAt = new DateTime(2026, 4, 26, 18, 34, 33, 292, DateTimeKind.Utc).AddTicks(304),
                             MaterialBaseId = new Guid("10000000-0000-0000-0000-000000000003"),
                             Name = "Basic",
-                            UpdatedAt = new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(7507)
+                            UpdatedAt = new DateTime(2026, 4, 26, 18, 34, 33, 292, DateTimeKind.Utc).AddTicks(304)
                         },
                         new
                         {
                             Id = new Guid("20000000-0000-0000-0000-000000000011"),
-                            CreatedAt = new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(7513),
+                            CreatedAt = new DateTime(2026, 4, 26, 18, 34, 33, 292, DateTimeKind.Utc).AddTicks(310),
                             MaterialBaseId = new Guid("10000000-0000-0000-0000-000000000003"),
                             Name = "Matte",
-                            UpdatedAt = new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(7513)
+                            UpdatedAt = new DateTime(2026, 4, 26, 18, 34, 33, 292, DateTimeKind.Utc).AddTicks(310)
                         },
                         new
                         {
                             Id = new Guid("20000000-0000-0000-0000-000000000012"),
-                            CreatedAt = new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(7519),
+                            CreatedAt = new DateTime(2026, 4, 26, 18, 34, 33, 292, DateTimeKind.Utc).AddTicks(316),
                             MaterialBaseId = new Guid("10000000-0000-0000-0000-000000000004"),
                             Name = "Basic",
-                            UpdatedAt = new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(7520)
+                            UpdatedAt = new DateTime(2026, 4, 26, 18, 34, 33, 292, DateTimeKind.Utc).AddTicks(317)
                         },
                         new
                         {
                             Id = new Guid("20000000-0000-0000-0000-000000000013"),
-                            CreatedAt = new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(7526),
+                            CreatedAt = new DateTime(2026, 4, 26, 18, 34, 33, 292, DateTimeKind.Utc).AddTicks(323),
                             MaterialBaseId = new Guid("10000000-0000-0000-0000-000000000004"),
                             Name = "Matte",
-                            UpdatedAt = new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(7526)
+                            UpdatedAt = new DateTime(2026, 4, 26, 18, 34, 33, 292, DateTimeKind.Utc).AddTicks(323)
                         },
                         new
                         {
                             Id = new Guid("20000000-0000-0000-0000-000000000014"),
-                            CreatedAt = new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(7532),
+                            CreatedAt = new DateTime(2026, 4, 26, 18, 34, 33, 292, DateTimeKind.Utc).AddTicks(329),
                             MaterialBaseId = new Guid("10000000-0000-0000-0000-000000000005"),
                             Name = "Basic",
-                            UpdatedAt = new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(7532)
+                            UpdatedAt = new DateTime(2026, 4, 26, 18, 34, 33, 292, DateTimeKind.Utc).AddTicks(329)
                         },
                         new
                         {
                             Id = new Guid("20000000-0000-0000-0000-000000000015"),
-                            CreatedAt = new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(7538),
+                            CreatedAt = new DateTime(2026, 4, 26, 18, 34, 33, 292, DateTimeKind.Utc).AddTicks(336),
                             MaterialBaseId = new Guid("10000000-0000-0000-0000-000000000006"),
                             Name = "Basic",
-                            UpdatedAt = new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(7539)
+                            UpdatedAt = new DateTime(2026, 4, 26, 18, 34, 33, 292, DateTimeKind.Utc).AddTicks(336)
                         });
                 });
 
@@ -391,90 +462,90 @@ namespace Extrudex.Infrastructure.Data.Migrations
                         new
                         {
                             Id = new Guid("30000000-0000-0000-0000-000000000001"),
-                            CreatedAt = new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(7690),
+                            CreatedAt = new DateTime(2026, 4, 26, 18, 34, 33, 292, DateTimeKind.Utc).AddTicks(482),
                             MaterialBaseId = new Guid("10000000-0000-0000-0000-000000000001"),
                             Name = "Carbon Fiber",
-                            UpdatedAt = new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(7690)
+                            UpdatedAt = new DateTime(2026, 4, 26, 18, 34, 33, 292, DateTimeKind.Utc).AddTicks(482)
                         },
                         new
                         {
                             Id = new Guid("30000000-0000-0000-0000-000000000002"),
-                            CreatedAt = new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(7838),
+                            CreatedAt = new DateTime(2026, 4, 26, 18, 34, 33, 292, DateTimeKind.Utc).AddTicks(805),
                             MaterialBaseId = new Guid("10000000-0000-0000-0000-000000000001"),
                             Name = "Glass Fiber",
-                            UpdatedAt = new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(7838)
+                            UpdatedAt = new DateTime(2026, 4, 26, 18, 34, 33, 292, DateTimeKind.Utc).AddTicks(806)
                         },
                         new
                         {
                             Id = new Guid("30000000-0000-0000-0000-000000000003"),
-                            CreatedAt = new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(7846),
+                            CreatedAt = new DateTime(2026, 4, 26, 18, 34, 33, 292, DateTimeKind.Utc).AddTicks(815),
                             MaterialBaseId = new Guid("10000000-0000-0000-0000-000000000001"),
                             Name = "Wood Fill",
-                            UpdatedAt = new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(7846)
+                            UpdatedAt = new DateTime(2026, 4, 26, 18, 34, 33, 292, DateTimeKind.Utc).AddTicks(815)
                         },
                         new
                         {
                             Id = new Guid("30000000-0000-0000-0000-000000000004"),
-                            CreatedAt = new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(7853),
+                            CreatedAt = new DateTime(2026, 4, 26, 18, 34, 33, 292, DateTimeKind.Utc).AddTicks(821),
                             MaterialBaseId = new Guid("10000000-0000-0000-0000-000000000001"),
                             Name = "Glow-in-the-Dark",
-                            UpdatedAt = new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(7853)
+                            UpdatedAt = new DateTime(2026, 4, 26, 18, 34, 33, 292, DateTimeKind.Utc).AddTicks(821)
                         },
                         new
                         {
                             Id = new Guid("30000000-0000-0000-0000-000000000005"),
-                            CreatedAt = new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(7859),
+                            CreatedAt = new DateTime(2026, 4, 26, 18, 34, 33, 292, DateTimeKind.Utc).AddTicks(828),
                             MaterialBaseId = new Guid("10000000-0000-0000-0000-000000000002"),
                             Name = "Carbon Fiber",
-                            UpdatedAt = new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(7859)
+                            UpdatedAt = new DateTime(2026, 4, 26, 18, 34, 33, 292, DateTimeKind.Utc).AddTicks(828)
                         },
                         new
                         {
                             Id = new Guid("30000000-0000-0000-0000-000000000006"),
-                            CreatedAt = new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(7865),
+                            CreatedAt = new DateTime(2026, 4, 26, 18, 34, 33, 292, DateTimeKind.Utc).AddTicks(834),
                             MaterialBaseId = new Guid("10000000-0000-0000-0000-000000000002"),
                             Name = "Glass Fiber",
-                            UpdatedAt = new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(7866)
+                            UpdatedAt = new DateTime(2026, 4, 26, 18, 34, 33, 292, DateTimeKind.Utc).AddTicks(834)
                         },
                         new
                         {
                             Id = new Guid("30000000-0000-0000-0000-000000000007"),
-                            CreatedAt = new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(7872),
+                            CreatedAt = new DateTime(2026, 4, 26, 18, 34, 33, 292, DateTimeKind.Utc).AddTicks(840),
                             MaterialBaseId = new Guid("10000000-0000-0000-0000-000000000003"),
                             Name = "Carbon Fiber",
-                            UpdatedAt = new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(7872)
+                            UpdatedAt = new DateTime(2026, 4, 26, 18, 34, 33, 292, DateTimeKind.Utc).AddTicks(840)
                         },
                         new
                         {
                             Id = new Guid("30000000-0000-0000-0000-000000000008"),
-                            CreatedAt = new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(7878),
+                            CreatedAt = new DateTime(2026, 4, 26, 18, 34, 33, 292, DateTimeKind.Utc).AddTicks(847),
                             MaterialBaseId = new Guid("10000000-0000-0000-0000-000000000003"),
                             Name = "Glass Fiber",
-                            UpdatedAt = new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(7879)
+                            UpdatedAt = new DateTime(2026, 4, 26, 18, 34, 33, 292, DateTimeKind.Utc).AddTicks(847)
                         },
                         new
                         {
                             Id = new Guid("30000000-0000-0000-0000-000000000009"),
-                            CreatedAt = new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(7885),
+                            CreatedAt = new DateTime(2026, 4, 26, 18, 34, 33, 292, DateTimeKind.Utc).AddTicks(853),
                             MaterialBaseId = new Guid("10000000-0000-0000-0000-000000000004"),
                             Name = "Carbon Fiber",
-                            UpdatedAt = new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(7885)
+                            UpdatedAt = new DateTime(2026, 4, 26, 18, 34, 33, 292, DateTimeKind.Utc).AddTicks(853)
                         },
                         new
                         {
                             Id = new Guid("30000000-0000-0000-0000-000000000010"),
-                            CreatedAt = new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(7891),
+                            CreatedAt = new DateTime(2026, 4, 26, 18, 34, 33, 292, DateTimeKind.Utc).AddTicks(859),
                             MaterialBaseId = new Guid("10000000-0000-0000-0000-000000000006"),
                             Name = "Carbon Fiber",
-                            UpdatedAt = new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(7891)
+                            UpdatedAt = new DateTime(2026, 4, 26, 18, 34, 33, 292, DateTimeKind.Utc).AddTicks(860)
                         },
                         new
                         {
                             Id = new Guid("30000000-0000-0000-0000-000000000011"),
-                            CreatedAt = new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(7898),
+                            CreatedAt = new DateTime(2026, 4, 26, 18, 34, 33, 292, DateTimeKind.Utc).AddTicks(866),
                             MaterialBaseId = new Guid("10000000-0000-0000-0000-000000000006"),
                             Name = "Glass Fiber",
-                            UpdatedAt = new DateTime(2026, 4, 26, 18, 43, 28, 895, DateTimeKind.Utc).AddTicks(7898)
+                            UpdatedAt = new DateTime(2026, 4, 26, 18, 34, 33, 292, DateTimeKind.Utc).AddTicks(866)
                         });
                 });
 
@@ -806,81 +877,6 @@ namespace Extrudex.Infrastructure.Data.Migrations
                     b.ToTable("spools", (string)null);
                 });
 
-            modelBuilder.Entity("Extrudex.Domain.Entities.UsageLog", b =>
-                {
-                    b.Property<Guid>("Id")
-                        .HasColumnType("uuid")
-                        .HasColumnName("id");
-
-                    b.Property<DateTime>("CreatedAt")
-                        .ValueGeneratedOnAdd()
-                        .HasColumnType("timestamp with time zone")
-                        .HasColumnName("created_at")
-                        .HasDefaultValueSql("now() at time zone 'utc'");
-
-                    b.Property<string>("DataSource")
-                        .IsRequired()
-                        .HasMaxLength(50)
-                        .HasColumnType("character varying(50)")
-                        .HasColumnName("data_source");
-
-                    b.Property<decimal>("GramsUsed")
-                        .HasPrecision(10, 2)
-                        .HasColumnType("numeric(10,2)")
-                        .HasColumnName("grams_used");
-
-                    b.Property<decimal?>("MmExtruded")
-                        .HasPrecision(12, 2)
-                        .HasColumnType("numeric(12,2)")
-                        .HasColumnName("mm_extruded");
-
-                    b.Property<string>("Notes")
-                        .HasMaxLength(2000)
-                        .HasColumnType("character varying(2000)")
-                        .HasColumnName("notes");
-
-                    b.Property<Guid?>("PrintJobId")
-                        .HasColumnType("uuid")
-                        .HasColumnName("print_job_id");
-
-                    b.Property<Guid?>("PrinterId")
-                        .HasColumnType("uuid")
-                        .HasColumnName("printer_id");
-
-                    b.Property<Guid>("SpoolId")
-                        .HasColumnType("uuid")
-                        .HasColumnName("spool_id");
-
-                    b.Property<DateTime>("UpdatedAt")
-                        .ValueGeneratedOnAdd()
-                        .HasColumnType("timestamp with time zone")
-                        .HasColumnName("updated_at")
-                        .HasDefaultValueSql("now() at time zone 'utc'");
-
-                    b.Property<DateTime>("UsageTimestamp")
-                        .HasColumnType("timestamp with time zone")
-                        .HasColumnName("usage_timestamp");
-
-                    b.HasKey("Id");
-
-                    b.HasIndex("DataSource")
-                        .HasDatabaseName("ix_usage_logs_data_source");
-
-                    b.HasIndex("PrintJobId")
-                        .HasDatabaseName("ix_usage_logs_print_job_id");
-
-                    b.HasIndex("PrinterId")
-                        .HasDatabaseName("ix_usage_logs_printer_id");
-
-                    b.HasIndex("SpoolId")
-                        .HasDatabaseName("ix_usage_logs_spool_id");
-
-                    b.HasIndex("UsageTimestamp")
-                        .HasDatabaseName("ix_usage_logs_usage_timestamp");
-
-                    b.ToTable("usage_logs", (string)null);
-                });
-
             modelBuilder.Entity("Extrudex.Domain.Entities.AmsSlot", b =>
                 {
                     b.HasOne("Extrudex.Domain.Entities.AmsUnit", "AmsUnit")
@@ -913,6 +909,36 @@ namespace Extrudex.Infrastructure.Data.Migrations
                     b.Navigation("Printer");
                 });
 
+            modelBuilder.Entity("Extrudex.Domain.Entities.FilamentUsage", b =>
+                {
+                    b.HasOne("Extrudex.Domain.Entities.PrintJob", "PrintJob")
+                        .WithMany("FilamentUsages")
+                        .HasForeignKey("PrintJobId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired()
+                        .HasConstraintName("fk_filament_usages_print_job");
+
+                    b.HasOne("Extrudex.Domain.Entities.Printer", "Printer")
+                        .WithMany("FilamentUsages")
+                        .HasForeignKey("PrinterId")
+                        .OnDelete(DeleteBehavior.Restrict)
+                        .IsRequired()
+                        .HasConstraintName("fk_filament_usages_printer");
+
+                    b.HasOne("Extrudex.Domain.Entities.Spool", "Spool")
+                        .WithMany("FilamentUsages")
+                        .HasForeignKey("SpoolId")
+                        .OnDelete(DeleteBehavior.Restrict)
+                        .IsRequired()
+                        .HasConstraintName("fk_filament_usages_spool");
+
+                    b.Navigation("PrintJob");
+
+                    b.Navigation("Printer");
+
+                    b.Navigation("Spool");
+                });
+
             modelBuilder.Entity("Extrudex.Domain.Entities.MaterialFinish", b =>
                 {
                     b.HasOne("Extrudex.Domain.Entities.MaterialBase", "MaterialBase")
@@ -987,34 +1013,6 @@ namespace Extrudex.Infrastructure.Data.Migrations
                     b.Navigation("MaterialModifier");
                 });
 
-            modelBuilder.Entity("Extrudex.Domain.Entities.UsageLog", b =>
-                {
-                    b.HasOne("Extrudex.Domain.Entities.PrintJob", "PrintJob")
-                        .WithMany()
-                        .HasForeignKey("PrintJobId")
-                        .OnDelete(DeleteBehavior.SetNull)
-                        .HasConstraintName("fk_usage_logs_print_job");
-
-                    b.HasOne("Extrudex.Domain.Entities.Printer", "Printer")
-                        .WithMany()
-                        .HasForeignKey("PrinterId")
-                        .OnDelete(DeleteBehavior.SetNull)
-                        .HasConstraintName("fk_usage_logs_printer");
-
-                    b.HasOne("Extrudex.Domain.Entities.Spool", "Spool")
-                        .WithMany()
-                        .HasForeignKey("SpoolId")
-                        .OnDelete(DeleteBehavior.Restrict)
-                        .IsRequired()
-                        .HasConstraintName("fk_usage_logs_spool");
-
-                    b.Navigation("PrintJob");
-
-                    b.Navigation("Printer");
-
-                    b.Navigation("Spool");
-                });
-
             modelBuilder.Entity("Extrudex.Domain.Entities.AmsUnit", b =>
                 {
                     b.Navigation("Slots");
@@ -1039,10 +1037,17 @@ namespace Extrudex.Infrastructure.Data.Migrations
                     b.Navigation("Spools");
                 });
 
+            modelBuilder.Entity("Extrudex.Domain.Entities.PrintJob", b =>
+                {
+                    b.Navigation("FilamentUsages");
+                });
+
             modelBuilder.Entity("Extrudex.Domain.Entities.Printer", b =>
                 {
                     b.Navigation("AmsUnits");
 
+                    b.Navigation("FilamentUsages");
+
                     b.Navigation("PrintJobs");
                 });
 
@@ -1050,6 +1055,8 @@ namespace Extrudex.Infrastructure.Data.Migrations
                 {
                     b.Navigation("AmsSlots");
 
+                    b.Navigation("FilamentUsages");
+
                     b.Navigation("PrintJobs");
                 });
 #pragma warning restore 612, 618

backend/Infrastructure/Services/CostPerPrintService.cs

@@ -1,158 +0,0 @@
-using Extrudex.Domain.Interfaces;
-using Extrudex.Infrastructure.Data;
-using Microsoft.EntityFrameworkCore;
-using Microsoft.Extensions.Logging;
-
-namespace Extrudex.Infrastructure.Services;
-
-/// <summary>
-/// Calculates the cost of goods sold (COGS) per print job using the spool's
-/// purchase price and the print job's derived grams consumed.
-///
-/// Formula:
-///   cost_per_gram = purchase_price / weight_total_grams
-///   cost_per_print = grams_derived × cost_per_gram
-///
-/// Handles missing data gracefully — if the spool has no purchase price or
-/// weight recorded, the result includes warnings and null cost fields
-/// instead of throwing exceptions.
-/// </summary>
-public class CostPerPrintService : ICostPerPrintService
-{
-    private readonly ExtrudexDbContext _dbContext;
-    private readonly ILogger<CostPerPrintService> _logger;
-
-    /// <summary>
-    /// Initializes a new instance of the <see cref="CostPerPrintService"/> class.
-    /// </summary>
-    /// <param name="dbContext">The database context for data access.</param>
-    /// <param name="logger">The logger for diagnostic output.</param>
-    public CostPerPrintService(ExtrudexDbContext dbContext, ILogger<CostPerPrintService> logger)
-    {
-        _dbContext = dbContext;
-        _logger = logger;
-    }
-
-    /// <inheritdoc />
-    public async Task<CostPerPrintResult> CalculateAsync(Guid printJobId, CancellationToken cancellationToken = default)
-    {
-        _logger.LogDebug("Calculating cost per print for job {PrintJobId}", printJobId);
-
-        var job = await _dbContext.PrintJobs
-            .Include(j => j.Spool)
-            .ThenInclude(s => s!.MaterialBase)
-            .FirstOrDefaultAsync(j => j.Id == printJobId, cancellationToken);
-
-        if (job is null)
-        {
-            _logger.LogWarning("Print job {PrintJobId} not found for cost calculation", printJobId);
-            return new CostPerPrintResult
-            {
-                PrintJobId = printJobId,
-                Warnings = new List<string> { $"Print job with ID '{printJobId}' not found." }
-            };
-        }
-
-        return BuildResult(job);
-    }
-
-    /// <inheritdoc />
-    public async Task<IReadOnlyList<CostPerPrintResult>> CalculateBySpoolAsync(
-        Guid spoolId, CancellationToken cancellationToken = default)
-    {
-        _logger.LogDebug("Calculating cost per print for all jobs on spool {SpoolId}", spoolId);
-
-        var jobs = await _dbContext.PrintJobs
-            .Include(j => j.Spool)
-            .ThenInclude(s => s!.MaterialBase)
-            .Where(j => j.SpoolId == spoolId)
-            .OrderByDescending(j => j.CreatedAt)
-            .ToListAsync(cancellationToken);
-
-        if (jobs.Count == 0)
-        {
-            _logger.LogDebug("No print jobs found for spool {SpoolId}", spoolId);
-            return Array.Empty<CostPerPrintResult>();
-        }
-
-        return jobs.Select(BuildResult).ToList();
-    }
-
-    /// <summary>
-    /// Builds a <see cref="CostPerPrintResult"/> from a print job entity.
-    /// Computes cost_per_gram and cost_per_print when all required data is available.
-    /// Populates warnings when data is missing or incomplete.
-    /// </summary>
-    /// <param name="job">The print job entity with Spool navigation loaded.</param>
-    /// <returns>A cost calculation result with breakdown and any warnings.</returns>
-    private CostPerPrintResult BuildResult(Domain.Entities.PrintJob job)
-    {
-        var warnings = new List<string>();
-        var spool = job.Spool;
-
-        // Map what we always have
-        var result = new CostPerPrintResult
-        {
-            PrintJobId = job.Id,
-            PrintName = job.PrintName,
-            SpoolId = job.SpoolId,
-            SpoolSerial = spool?.SpoolSerial ?? string.Empty,
-            MmExtruded = job.MmExtruded,
-            GramsDerived = job.GramsDerived,
-        };
-
-        // Guard: spool must be loaded
-        if (spool is null)
-        {
-            warnings.Add("Spool data is not available for this print job.");
-            result.Warnings = warnings;
-            return result;
-        }
-
-        // Capture purchase price
-        result.PurchasePrice = spool.PurchasePrice;
-        result.WeightTotalGrams = spool.WeightTotalGrams;
-
-        // Check for missing purchase price
-        if (!spool.PurchasePrice.HasValue)
-        {
-            warnings.Add(
-                "Spool purchase price is not recorded. Cost calculation requires a purchase price on the spool.");
-        }
-
-        // Check for zero or negative weight — prevents division by zero
-        if (spool.WeightTotalGrams <= 0)
-        {
-            warnings.Add(
-                "Spool total weight is zero or not recorded. Cost calculation requires a positive weight_total_grams on the spool.");
-        }
-
-        // Check for zero grams derived
-        if (job.GramsDerived <= 0)
-        {
-            warnings.Add(
-                "Derived grams consumed is zero. Ensure mm_extruded, filament diameter, and material density are recorded for this print job.");
-        }
-
-        // If all data is present and valid, compute the cost
-        if (spool.PurchasePrice.HasValue && spool.WeightTotalGrams > 0 && job.GramsDerived > 0)
-        {
-            var costPerGram = spool.PurchasePrice.Value / spool.WeightTotalGrams;
-            result.CostPerGram = Math.Round(costPerGram, 6);
-            result.CostPerPrint = Math.Round(job.GramsDerived * costPerGram, 4);
-
-            _logger.LogDebug(
-                "Cost calculated for job {PrintJobId}: {GramsDerived}g × {CostPerGram:C}/g = {CostPerPrint:C}",
-                job.Id, job.GramsDerived, result.CostPerGram, result.CostPerPrint);
-        }
-        else
-        {
-            _logger.LogDebug(
-                "Cost calculation incomplete for job {PrintJobId}: missing data (warnings: {WarningCount})",
-                job.Id, warnings.Count);
-        }
-
-        result.Warnings = warnings;
-        return result;
-    }
-}

backend/Infrastructure/Services/FilamentUsageService.cs

@@ -0,0 +1,79 @@
+using Extrudex.Domain.Entities;
+using Extrudex.Domain.Interfaces;
+using Extrudex.Infrastructure.Data;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.Extensions.Logging;
+
+namespace Extrudex.Infrastructure.Services;
+
+/// <summary>
+/// EF Core–backed implementation of the filament usage service.
+/// Persists usage records to the database and provides query methods
+/// for retrieving usage by print job or spool.
+/// </summary>
+public class FilamentUsageService : IFilamentUsageService
+{
+    private readonly ExtrudexDbContext _dbContext;
+    private readonly ILogger<FilamentUsageService> _logger;
+
+    public FilamentUsageService(
+        ExtrudexDbContext dbContext,
+        ILogger<FilamentUsageService> logger)
+    {
+        _dbContext = dbContext;
+        _logger = logger;
+    }
+
+    /// <inheritdoc />
+    public async Task<FilamentUsage> RecordUsageAsync(
+        Guid printJobId,
+        Guid spoolId,
+        Guid printerId,
+        decimal gramsUsed,
+        decimal mmExtruded,
+        string? notes = null,
+        CancellationToken cancellationToken = default)
+    {
+        var usage = new FilamentUsage
+        {
+            PrintJobId = printJobId,
+            SpoolId = spoolId,
+            PrinterId = printerId,
+            GramsUsed = gramsUsed,
+            MmExtruded = mmExtruded,
+            RecordedAt = DateTime.UtcNow,
+            Notes = notes
+        };
+
+        _dbContext.FilamentUsages.Add(usage);
+        await _dbContext.SaveChangesAsync(cancellationToken);
+
+        _logger.LogInformation(
+            "Recorded filament usage: {Grams}g / {Mm}mm for print job {JobId} on spool {SpoolId}",
+            gramsUsed, mmExtruded, printJobId, spoolId);
+
+        return usage;
+    }
+
+    /// <inheritdoc />
+    public async Task<IReadOnlyList<FilamentUsage>> GetByPrintJobAsync(
+        Guid printJobId,
+        CancellationToken cancellationToken = default)
+    {
+        return await _dbContext.FilamentUsages
+            .Where(u => u.PrintJobId == printJobId)
+            .OrderByDescending(u => u.RecordedAt)
+            .ToListAsync(cancellationToken);
+    }
+
+    /// <inheritdoc />
+    public async Task<IReadOnlyList<FilamentUsage>> GetBySpoolAsync(
+        Guid spoolId,
+        CancellationToken cancellationToken = default)
+    {
+        return await _dbContext.FilamentUsages
+            .Where(u => u.SpoolId == spoolId)
+            .OrderByDescending(u => u.RecordedAt)
+            .ToListAsync(cancellationToken);
+    }
+}

backend/Infrastructure/Services/FilamentUsageSyncService.cs

@@ -1,139 +0,0 @@
-using Extrudex.Domain.Enums;
-using Extrudex.Domain.Interfaces;
-using Extrudex.Infrastructure.Data;
-using Microsoft.EntityFrameworkCore;
-using Microsoft.Extensions.Logging;
-
-namespace Extrudex.Infrastructure.Configuration;
-
-/// <summary>
-/// Service that syncs filament usage data from Moonraker printers into the
-/// Extrudex database. Queries all active Moonraker printers, fetches their
-/// current filament usage metrics, and updates spool remaining weights and
-/// print job records.
-/// </summary>
-public class FilamentUsageSyncService : IFilamentUsageSyncService
-{
-    private readonly ExtrudexDbContext _dbContext;
-    private readonly IMoonrakerClient _moonrakerClient;
-    private readonly ILogger<FilamentUsageSyncService> _logger;
-
-    /// <summary>
-    /// Creates a new FilamentUsageSyncService.
-    /// </summary>
-    /// <param name="dbContext">The EF Core database context for persisting updates.</param>
-    /// <param name="moonrakerClient">The Moonraker HTTP client for fetching printer data.</param>
-    /// <param name="logger">Logger for diagnostic output.</param>
-    public FilamentUsageSyncService(
-        ExtrudexDbContext dbContext,
-        IMoonrakerClient moonrakerClient,
-        ILogger<FilamentUsageSyncService> logger)
-    {
-        _dbContext = dbContext;
-        _moonrakerClient = moonrakerClient;
-        _logger = logger;
-    }
-
-    /// <inheritdoc />
-    public async Task<int> SyncAllAsync(CancellationToken cancellationToken = default)
-    {
-        _logger.LogInformation("Starting filament usage sync cycle");
-
-        var printers = await _dbContext.Printers
-            .Where(p => p.IsActive && p.ConnectionType == ConnectionType.Moonraker)
-            .Include(p => p.AmsUnits)
-                .ThenInclude(u => u.Slots)
-                    .ThenInclude(s => s.Spool)
-            .ToListAsync(cancellationToken);
-
-        if (printers.Count == 0)
-        {
-            _logger.LogInformation("No active Moonraker printers found — skipping sync");
-            return 0;
-        }
-
-        _logger.LogInformation("Found {PrinterCount} active Moonraker printer(s) to sync", printers.Count);
-
-        var syncedCount = 0;
-
-        foreach (var printer in printers)
-        {
-            try
-            {
-                var usageData = await _moonrakerClient.GetFilamentUsageAsync(
-                    printer.HostnameOrIp,
-                    printer.Port,
-                    printer.ApiKey,
-                    cancellationToken);
-
-                if (usageData.Count == 0)
-                {
-                    _logger.LogWarning(
-                        "No usage data returned from printer {PrinterName} ({Host}:{Port})",
-                        printer.Name, printer.HostnameOrIp, printer.Port);
-                    continue;
-                }
-
-                // Update spool remaining weights from AMS data
-                UpdateSpoolWeights(printer, usageData);
-
-                // Mark printer as seen and idle (reachable = idle, not printing)
-                printer.LastSeenAt = DateTime.UtcNow;
-                printer.Status = PrinterStatus.Idle;
-
-                syncedCount++;
-                _logger.LogInformation(
-                    "Successfully synced filament usage from printer {PrinterName}",
-                    printer.Name);
-            }
-            catch (Exception ex)
-            {
-                _logger.LogError(ex,
-                    "Error syncing filament usage from printer {PrinterName} ({Host}:{Port})",
-                    printer.Name, printer.HostnameOrIp, printer.Port);
-            }
-        }
-
-        await _dbContext.SaveChangesAsync(cancellationToken);
-
-        _logger.LogInformation(
-            "Filament usage sync cycle complete — {SyncedCount}/{TotalCount} printers synced",
-            syncedCount, printers.Count);
-
-        return syncedCount;
-    }
-
-    /// <summary>
-    /// Updates spool remaining weights based on usage data received from Moonraker.
-    /// For printers with AMS units, updates the remaining weight on each slot's spool.
-    /// </summary>
-    private void UpdateSpoolWeights(
-        Domain.Entities.Printer printer,
-        Dictionary<string, decimal> usageData)
-    {
-        // Update AMS slot remaining weights if available
-        foreach (var amsUnit in printer.AmsUnits)
-        {
-            foreach (var slot in amsUnit.Slots)
-            {
-                if (slot.Spool != null && slot.RemainingWeightG.HasValue)
-                {
-                    // Sync the AMS-reported remaining weight to the spool
-                    slot.Spool.WeightRemainingGrams = slot.RemainingWeightG.Value;
-
-                    _logger.LogDebug(
-                        "Updated spool {SpoolSerial} remaining weight to {Weight}g",
-                        slot.Spool.SpoolSerial, slot.RemainingWeightG.Value);
-                }
-            }
-        }
-
-        // If usage data contains extruded mm, log it for observability
-        if (usageData.TryGetValue("mm_extruded", out var mmExtruded) && mmExtruded > 0)
-        {
-            _logger.LogInformation(
-                "Printer {PrinterName} reports {MmExtruded}mm filament extruded in latest job",
-                printer.Name, mmExtruded);
-        }
-    }
-}

backend/Infrastructure/Services/LowStockDetector.cs

@@ -1,95 +0,0 @@
-using Extrudex.Domain.Interfaces;
-using Microsoft.Extensions.Configuration;
-using Microsoft.Extensions.Logging;
-
-namespace Extrudex.Infrastructure.Services;
-
-/// <summary>
-/// Detects low-stock filament spools by comparing the remaining weight percentage
-/// against a configurable threshold. The threshold can be set via:
-///   1. EXTRUDEX_LOW_STOCK_THRESHOLD env var (highest priority, e.g. "25")
-///   2. FilamentAlerts:LowStockThresholdPercent in appsettings.json
-///   3. Default: 20% (a standard spool is "low" when ≤20% remains)
-/// </summary>
-public class LowStockDetector : ILowStockDetector
-{
-    private readonly ILogger<LowStockDetector> _logger;
-
-    /// <summary>
-    /// The percentage threshold below which a spool is considered low stock.
-    /// For example, 20 means a spool is "low" when ≤20% of its filament remains.
-    /// </summary>
-    public decimal LowStockThresholdPercent { get; }
-
-    /// <summary>
-    /// Initializes a new instance of the <see cref="LowStockDetector"/> class.
-    /// Reads the low-stock threshold from configuration with env var override support.
-    /// </summary>
-    /// <param name="configuration">Application configuration for threshold settings.</param>
-    /// <param name="logger">Logger for diagnostic output.</param>
-    public LowStockDetector(IConfiguration configuration, ILogger<LowStockDetector> logger)
-    {
-        _logger = logger;
-
-        // Priority: env var > appsettings > default (20%)
-        var envThreshold = Environment.GetEnvironmentVariable("EXTRUDEX_LOW_STOCK_THRESHOLD");
-        var configThreshold = configuration.GetValue<decimal?>("FilamentAlerts:LowStockThresholdPercent");
-
-        if (!string.IsNullOrEmpty(envThreshold) && decimal.TryParse(envThreshold, out var parsedEnv))
-        {
-            LowStockThresholdPercent = Math.Clamp(parsedEnv, 0m, 100m);
-            _logger.LogInformation(
-                "Low-stock threshold set from env var EXTRUDEX_LOW_STOCK_THRESHOLD: {Threshold}%",
-                LowStockThresholdPercent);
-        }
-        else if (configThreshold.HasValue)
-        {
-            LowStockThresholdPercent = Math.Clamp(configThreshold.Value, 0m, 100m);
-            _logger.LogInformation(
-                "Low-stock threshold set from config FilamentAlerts:LowStockThresholdPercent: {Threshold}%",
-                LowStockThresholdPercent);
-        }
-        else
-        {
-            LowStockThresholdPercent = 20m;
-            _logger.LogInformation(
-                "Low-stock threshold using default: {Threshold}%", LowStockThresholdPercent);
-        }
-    }
-
-    /// <inheritdoc />
-    public bool IsLowStock(decimal weightRemainingGrams, decimal weightTotalGrams)
-    {
-        if (weightTotalGrams <= 0m)
-        {
-            _logger.LogDebug(
-                "Spool with total weight {Total}g cannot be evaluated for low stock — treating as not low",
-                weightTotalGrams);
-            return false;
-        }
-
-        var remainingPercent = GetRemainingWeightPercent(weightRemainingGrams, weightTotalGrams);
-        var isLow = remainingPercent <= LowStockThresholdPercent;
-
-        if (isLow)
-        {
-            _logger.LogDebug(
-                "Spool is LOW STOCK: {Remaining}g / {Total}g = {Percent:F1}% (threshold: {Threshold}%)",
-                weightRemainingGrams, weightTotalGrams, remainingPercent, LowStockThresholdPercent);
-        }
-
-        return isLow;
-    }
-
-    /// <inheritdoc />
-    public decimal GetRemainingWeightPercent(decimal weightRemainingGrams, decimal weightTotalGrams)
-    {
-        if (weightTotalGrams <= 0m)
-            return 0m;
-
-        return Math.Round(
-            (weightRemainingGrams / weightTotalGrams) * 100m,
-            1,
-            MidpointRounding.AwayFromZero);
-    }
-}

backend/Infrastructure/Services/MoonrakerClient.cs

@@ -4,7 +4,7 @@ using Extrudex.Domain.DTOs.Moonraker;
 using Extrudex.Domain.Interfaces;
 using Microsoft.Extensions.Logging;
 
-namespace Extrudex.Infrastructure.Services;
+namespace Extrudex.Infrastructure.Configuration;
 
 /// <summary>
 /// HTTP client for communicating with Moonraker REST API endpoints

backend/Infrastructure/Services/MoonrakerPrinterSyncService.cs

@@ -1,320 +0,0 @@
-using Extrudex.Domain.DTOs.Moonraker;
-using Extrudex.Domain.Entities;
-using Extrudex.Domain.Enums;
-using Extrudex.Domain.Interfaces;
-using Extrudex.Infrastructure.Configuration;
-using Extrudex.Infrastructure.Data;
-using Microsoft.EntityFrameworkCore;
-using Microsoft.Extensions.Logging;
-
-namespace Extrudex.Infrastructure.Services;
-
-/// <summary>
-/// Service that syncs Moonraker printer status and print job history into the
-/// Extrudex database. Queries all active Moonraker printers, fetches their
-/// current operational state, and maps completed print jobs to PrintJob and
-/// FilamentUsage entities with derived gram calculations.
-/// </summary>
-public class MoonrakerPrinterSyncService : IMoonrakerPrinterSyncService
-{
-    private readonly ExtrudexDbContext _dbContext;
-    private readonly IMoonrakerClient _moonrakerClient;
-    private readonly ILogger<MoonrakerPrinterSyncService> _logger;
-
-    /// <summary>
-    /// Creates a new MoonrakerPrinterSyncService.
-    /// </summary>
-    /// <param name="dbContext">The EF Core database context for persisting updates.</param>
-    /// <param name="moonrakerClient">The Moonraker HTTP client for fetching printer data.</param>
-    /// <param name="logger">Logger for diagnostic output.</param>
-    public MoonrakerPrinterSyncService(
-        ExtrudexDbContext dbContext,
-        IMoonrakerClient moonrakerClient,
-        ILogger<MoonrakerPrinterSyncService> logger)
-    {
-        _dbContext = dbContext;
-        _moonrakerClient = moonrakerClient;
-        _logger = logger;
-    }
-
-    /// <inheritdoc />
-    public async Task<int> SyncAllAsync(CancellationToken cancellationToken = default)
-    {
-        _logger.LogInformation("Starting Moonraker printer sync cycle");
-
-        var printers = await _dbContext.Printers
-            .Where(p => p.IsActive && p.ConnectionType == ConnectionType.Moonraker)
-            .Include(p => p.AmsUnits)
-                .ThenInclude(u => u.Slots)
-                    .ThenInclude(s => s.Spool)
-                        .ThenInclude(s => s.MaterialBase)
-            .Include(p => p.PrintJobs)
-            .ToListAsync(cancellationToken);
-
-        if (printers.Count == 0)
-        {
-            _logger.LogInformation("No active Moonraker printers found — skipping sync");
-            return 0;
-        }
-
-        _logger.LogInformation("Found {PrinterCount} active Moonraker printer(s) to sync", printers.Count);
-
-        var syncedCount = 0;
-
-        foreach (var printer in printers)
-        {
-            try
-            {
-                await SyncPrinterAsync(printer, cancellationToken);
-                syncedCount++;
-            }
-            catch (Exception ex) when (ex is not OperationCanceledException)
-            {
-                _logger.LogError(ex,
-                    "Error syncing printer {PrinterName} ({Host}:{Port})",
-                    printer.Name, printer.HostnameOrIp, printer.Port);
-
-                // Mark printer as offline if we can't reach it
-                printer.Status = PrinterStatus.Offline;
-            }
-        }
-
-        await _dbContext.SaveChangesAsync(cancellationToken);
-
-        _logger.LogInformation(
-            "Moonraker printer sync cycle complete — {SyncedCount}/{TotalCount} printers synced",
-            syncedCount, printers.Count);
-
-        return syncedCount;
-    }
-
-    /// <summary>
-    /// Syncs a single Moonraker printer: updates its status, fetches print history,
-    /// and maps new print jobs to database entities.
-    /// </summary>
-    private async Task SyncPrinterAsync(Printer printer, CancellationToken cancellationToken)
-    {
-        // Step 1: Fetch printer status
-        var printerInfo = await _moonrakerClient.GetPrinterInfoAsync(
-            printer.HostnameOrIp, printer.Port, printer.ApiKey, cancellationToken);
-
-        var printStats = await _moonrakerClient.GetPrintStatsAsync(
-            printer.HostnameOrIp, printer.Port, printer.ApiKey, cancellationToken);
-
-        // Step 2: Update printer status
-        UpdatePrinterStatus(printer, printerInfo, printStats);
-        printer.LastSeenAt = DateTime.UtcNow;
-
-        _logger.LogDebug(
-            "Printer {PrinterName} status updated to {Status}",
-            printer.Name, printer.Status);
-
-        // Step 3: Fetch and map print job history
-        var history = await _moonrakerClient.GetPrintHistoryAsync(
-            printer.HostnameOrIp, printer.Port, printer.ApiKey,
-            limit: 25,
-            cancellationToken);
-
-        if (history.Items.Count == 0)
-        {
-            _logger.LogDebug("No print history returned for printer {PrinterName}", printer.Name);
-            return;
-        }
-
-        var newJobsCount = await MapPrintJobsAsync(printer, history.Items, cancellationToken);
-
-        if (newJobsCount > 0)
-        {
-            _logger.LogInformation(
-                "Mapped {NewJobsCount} new print job(s) from printer {PrinterName}",
-                newJobsCount, printer.Name);
-        }
-    }
-
-    /// <summary>
-    /// Updates the printer's operational status based on Moonraker telemetry.
-    /// Maps Klipper/Moonraker state strings to the PrinterStatus enum.
-    /// </summary>
-    private void UpdatePrinterStatus(
-        Printer printer,
-        MoonrakerPrinterInfo? printerInfo,
-        MoonrakerPrintStats? printStats)
-    {
-        // Prefer print_stats state — it's the most authoritative
-        if (printStats != null)
-        {
-            printer.Status = printStats.State.ToLowerInvariant() switch
-            {
-                "printing" => PrinterStatus.Printing,
-                "paused" => PrinterStatus.Paused,
-                "complete" => PrinterStatus.Idle,
-                "standby" => PrinterStatus.Idle,
-                "cancelled" => PrinterStatus.Idle,
-                "error" => PrinterStatus.Error,
-                _ => PrinterStatus.Idle
-            };
-            return;
-        }
-
-        // Fall back to printer_info state
-        if (printerInfo != null)
-        {
-            printer.Status = printerInfo.State.ToLowerInvariant() switch
-            {
-                "ready" => PrinterStatus.Idle,
-                "startup" => PrinterStatus.Idle,
-                "shutdown" => PrinterStatus.Offline,
-                "error" => PrinterStatus.Error,
-                "cancelled" => PrinterStatus.Idle,
-                _ => printer.Status // Preserve existing status if unknown
-            };
-        }
-    }
-
-    /// <summary>
-    /// Maps Moonraker print job history items to Extrudex PrintJob and FilamentUsage entities.
-    /// Only creates records for jobs not already tracked (by Moonraker JobId stored in GcodeFilePath).
-    /// </summary>
-    private async Task<int> MapPrintJobsAsync(
-        Printer printer,
-        List<MoonrakerPrintJob> historyItems,
-        CancellationToken cancellationToken)
-    {
-        // Build a set of already-tracked Moonraker JobIds for this printer
-        // We store the Moonraker JobId in the GcodeFilePath field with a "moonraker:" prefix
-        var trackedJobIds = await _dbContext.PrintJobs
-            .Where(pj => pj.PrinterId == printer.Id && pj.GcodeFilePath != null && pj.GcodeFilePath.StartsWith("moonraker:"))
-            .Select(pj => pj.GcodeFilePath!)
-            .ToListAsync(cancellationToken);
-
-        var trackedIdSet = new HashSet<string>(trackedJobIds);
-        var newJobsCount = 0;
-
-        // Find the default spool for this printer (first active spool in AMS, or first active spool overall)
-        var defaultSpool = FindDefaultSpool(printer);
-
-        foreach (var moonrakerJob in historyItems)
-        {
-            var jobIdKey = $"moonraker:{moonrakerJob.JobId}";
-
-            if (trackedIdSet.Contains(jobIdKey))
-            {
-                continue; // Already tracked — skip
-            }
-
-            // Only map completed, cancelled, or errored jobs (not in_progress)
-            // In-progress jobs will be captured on the next cycle once they finish
-            if (moonrakerJob.Status == "in_progress")
-            {
-                continue;
-            }
-
-            // Map Moonraker job status to JobStatus enum
-            var jobStatus = moonrakerJob.Status.ToLowerInvariant() switch
-            {
-                "completed" => JobStatus.Completed,
-                "cancelled" => JobStatus.Cancelled,
-                "error" => JobStatus.Failed,
-                _ => JobStatus.Completed
-            };
-
-            // Calculate derived grams if we have a spool and filament data
-            decimal gramsDerived = 0m;
-            decimal filamentDiameterMm = 1.75m;
-            decimal materialDensity = 1.24m; // PLA default
-
-            if (defaultSpool != null)
-            {
-                filamentDiameterMm = defaultSpool.FilamentDiameterMm;
-                materialDensity = defaultSpool.MaterialBase.DensityGperCm3;
-                gramsDerived = CalculateGrams(moonrakerJob.FilamentUsedMm, filamentDiameterMm, materialDensity);
-            }
-            else if (moonrakerJob.FilamentUsedMm > 0)
-            {
-                gramsDerived = CalculateGrams(moonrakerJob.FilamentUsedMm, 1.75m, 1.24m);
-                _logger.LogWarning(
-                    "No default spool found for printer {PrinterName} — using PLA defaults for grams derivation on job {JobId}",
-                    printer.Name, moonrakerJob.JobId);
-            }
-
-            var printJob = new PrintJob
-            {
-                PrinterId = printer.Id,
-                SpoolId = defaultSpool?.Id ?? Guid.Empty,
-                PrintName = moonrakerJob.Filename,
-                GcodeFilePath = jobIdKey,
-                MmExtruded = moonrakerJob.FilamentUsedMm,
-                GramsDerived = gramsDerived,
-                StartedAt = moonrakerJob.StartTime,
-                CompletedAt = moonrakerJob.EndTime,
-                Status = jobStatus,
-                DataSource = DataSource.Moonraker,
-                FilamentDiameterAtPrintMm = filamentDiameterMm,
-                MaterialDensityAtPrint = materialDensity,
-                Notes = $"Auto-imported from Moonraker (JobId: {moonrakerJob.JobId})"
-            };
-
-            _dbContext.PrintJobs.Add(printJob);
-
-            // Create a FilamentUsage record if filament was consumed
-            if (moonrakerJob.FilamentUsedMm > 0 && defaultSpool != null)
-            {
-                var usage = new FilamentUsage
-                {
-                    PrintJob = printJob,
-                    SpoolId = defaultSpool.Id,
-                    PrinterId = printer.Id,
-                    GramsUsed = gramsDerived,
-                    MmExtruded = moonrakerJob.FilamentUsedMm,
-                    RecordedAt = DateTime.UtcNow,
-                    Notes = $"Auto-imported from Moonraker history (JobId: {moonrakerJob.JobId})"
-                };
-
-                _dbContext.FilamentUsages.Add(usage);
-            }
-
-            newJobsCount++;
-            trackedIdSet.Add(jobIdKey); // Prevent duplicates within this batch
-        }
-
-        return newJobsCount;
-    }
-
-    /// <summary>
-    /// Finds the default spool for a printer. Returns the first spool loaded
-    /// in an AMS slot, or null if no spool is available.
-    /// </summary>
-    private static Spool? FindDefaultSpool(Printer printer)
-    {
-        // Prefer the first active spool in an AMS slot
-        foreach (var amsUnit in printer.AmsUnits)
-        {
-            foreach (var slot in amsUnit.Slots)
-            {
-                if (slot.Spool != null && slot.Spool.IsActive && !slot.Spool.IsArchived)
-                {
-                    return slot.Spool;
-                }
-            }
-        }
-
-        return null;
-    }
-
-    /// <summary>
-    /// Calculates derived grams from millimeters extruded using the standard formula:
-    /// grams = mm_extruded × cross_section_area × material_density
-    /// where cross_section_area = π × (diameter / 2)²
-    /// </summary>
-    private static decimal CalculateGrams(decimal mmExtruded, decimal diameterMm, decimal densityGperCm3)
-    {
-        if (mmExtruded <= 0) return 0m;
-
-        var radiusCm = (double)diameterMm / 2.0 / 10.0; // mm to cm
-        var crossSectionAreaCm2 = Math.PI * radiusCm * radiusCm;
-        var mmToCm = (double)mmExtruded / 10.0;
-
-        var grams = mmToCm * crossSectionAreaCm2 * (double)densityGperCm3;
-        return (decimal)grams;
-    }
-}

backend/Infrastructure/Services/MoonrakerUsagePoller.cs

@@ -0,0 +1,431 @@
+using Extrudex.Domain.Entities;
+using Extrudex.Domain.Enums;
+using Extrudex.Domain.Interfaces;
+using Extrudex.Infrastructure.Data;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.Extensions.Logging;
+using Microsoft.Extensions.Options;
+
+namespace Extrudex.Infrastructure.Services;
+
+/// <summary>
+/// Configuration options for the Moonraker usage polling service.
+/// </summary>
+public class MoonrakerPollerOptions
+{
+    /// <summary>
+    /// How often to poll each Moonraker printer for filament usage data.
+    /// Default: 30 seconds.
+    /// </summary>
+    public TimeSpan PollInterval { get; set; } = TimeSpan.FromSeconds(30);
+
+    /// <summary>
+    /// Timeout for individual Moonraker HTTP requests.
+    /// Default: 10 seconds.
+    /// </summary>
+    public TimeSpan RequestTimeout { get; set; } = TimeSpan.FromSeconds(10);
+
+    /// <summary>
+    /// Whether the polling service is enabled. Default: true.
+    /// Set to false to disable polling (e.g., in development or testing).
+    /// </summary>
+    public bool Enabled { get; set; } = true;
+}
+
+/// <summary>
+/// Background service that periodically polls Moonraker-connected printers
+/// for filament usage data. When a print job is detected as complete,
+/// the usage data is persisted to the FilamentUsage table via
+/// <see cref="IFilamentUsageService"/>.
+///
+/// <para>Polling logic:</para>
+/// <list type="number">
+///   <item>Query the database for all active printers with ConnectionType == Moonraker.</item>
+///   <item>For each printer, call <see cref="IMoonrakerClient.GetFilamentUsageAsync"/>.</item>
+///   <item>If usage data is available and the print state is "complete",
+///         create or update a FilamentUsage record.</item>
+///   <item>If the printer is unreachable or returns malformed data, log a warning
+///         and continue to the next printer (no crash).</item>
+/// </list>
+///
+/// <para>Error handling:</para>
+/// <list type="bullet">
+///   <item>API unreachable: logged as warning, poller continues for other printers.</item>
+///   <item>Malformed response: logged as warning, poller continues.</item>
+///   <item>Database errors: logged as error, poller continues.</item>
+/// </list>
+/// </summary>
+public class MoonrakerUsagePoller : BackgroundService
+{
+    private readonly IServiceScopeFactory _scopeFactory;
+    private readonly ILogger<MoonrakerUsagePoller> _logger;
+    private readonly MoonrakerPollerOptions _options;
+
+    /// <summary>
+    /// Tracks which Moonraker print jobs have already been recorded,
+    /// keyed by "printerId:gcodeFileName" to avoid duplicate recording.
+    /// </summary>
+    private readonly HashSet<string> _recordedJobs = new();
+
+    public MoonrakerUsagePoller(
+        IServiceScopeFactory scopeFactory,
+        ILogger<MoonrakerUsagePoller> logger,
+        IOptions<MoonrakerPollerOptions> options)
+    {
+        _scopeFactory = scopeFactory;
+        _logger = logger;
+        _options = options.Value;
+    }
+
+    protected override async Task ExecuteAsync(CancellationToken stoppingToken)
+    {
+        if (!_options.Enabled)
+        {
+            _logger.LogInformation("Moonraker usage poller is disabled via configuration.");
+            return;
+        }
+
+        _logger.LogInformation(
+            "Moonraker usage poller starting. Poll interval: {Interval}",
+            _options.PollInterval);
+
+        while (!stoppingToken.IsCancellationRequested)
+        {
+            try
+            {
+                await PollAllPrintersAsync(stoppingToken);
+            }
+            catch (Exception ex)
+            {
+                _logger.LogError(ex,
+                    "Unexpected error in Moonraker usage poller cycle. Continuing.");
+            }
+
+            await Task.Delay(_options.PollInterval, stoppingToken);
+        }
+
+        _logger.LogInformation("Moonraker usage poller stopping.");
+    }
+
+    /// <summary>
+    /// Polls all active Moonraker printers for filament usage data
+    /// and persists any completed print usage records.
+    /// </summary>
+    private async Task PollAllPrintersAsync(CancellationToken cancellationToken)
+    {
+        using var scope = _scopeFactory.CreateScope();
+        var dbContext = scope.ServiceProvider.GetRequiredService<ExtrudexDbContext>();
+        var moonrakerClient = scope.ServiceProvider.GetRequiredService<IMoonrakerClient>();
+        var usageService = scope.ServiceProvider.GetRequiredService<IFilamentUsageService>();
+
+        // Get all active Moonraker printers
+        var printers = await dbContext.Printers
+            .Where(p => p.IsActive && p.ConnectionType == ConnectionType.Moonraker)
+            .ToListAsync(cancellationToken);
+
+        if (printers.Count == 0)
+        {
+            _logger.LogDebug("No active Moonraker printers found.");
+            return;
+        }
+
+        _logger.LogDebug("Polling {Count} Moonraker printer(s).", printers.Count);
+
+        foreach (var printer in printers)
+        {
+            await PollPrinterAsync(
+                printer, moonrakerClient, usageService, dbContext, cancellationToken);
+        }
+    }
+
+    /// <summary>
+    /// Polls a single Moonraker printer for filament usage data.
+    /// If a completed print job is detected with usage data, it is persisted.
+    /// </summary>
+    private async Task PollPrinterAsync(
+        Printer printer,
+        IMoonrakerClient moonrakerClient,
+        IFilamentUsageService usageService,
+        ExtrudexDbContext dbContext,
+        CancellationToken cancellationToken)
+    {
+        _logger.LogDebug(
+            "Polling Moonraker printer {PrinterName} ({Host}:{Port})",
+            printer.Name, printer.HostnameOrIp, printer.Port);
+
+        try
+        {
+            // Update last-seen timestamp regardless of usage data
+            var usageData = await moonrakerClient.GetFilamentUsageAsync(
+                printer.HostnameOrIp,
+                printer.Port,
+                printer.ApiKey,
+                cancellationToken);
+
+            if (usageData is null)
+            {
+                _logger.LogDebug(
+                    "No filament usage data from printer {PrinterName}.",
+                    printer.Name);
+                return;
+            }
+
+            // Update printer last-seen timestamp
+            printer.LastSeenAt = DateTime.UtcNow;
+            await dbContext.SaveChangesAsync(cancellationToken);
+
+            _logger.LogDebug(
+                "Printer {PrinterName}: state={State}, mm={Mm}, file={File}",
+                printer.Name, usageData.PrintState, usageData.MmExtruded,
+                usageData.GcodeFileName);
+
+            // Only record usage for completed prints
+            if (usageData.MmExtruded <= 0)
+            {
+                _logger.LogDebug(
+                    "Printer {PrinterName} has no filament usage to record.",
+                    printer.Name);
+                return;
+            }
+
+            if (!IsCompleteState(usageData.PrintState))
+            {
+                _logger.LogDebug(
+                    "Printer {PrinterName} print state '{State}' is not complete; skipping.",
+                    printer.Name, usageData.PrintState);
+                return;
+            }
+
+            // Deduplicate: avoid recording the same completed job twice
+            var deduplicationKey = $"{printer.Id}:{usageData.GcodeFileName}";
+            if (_recordedJobs.Contains(deduplicationKey))
+            {
+                _logger.LogDebug(
+                    "Printer {PrinterName} job '{File}' already recorded; skipping.",
+                    printer.Name, usageData.GcodeFileName);
+                return;
+            }
+
+            // Find or create a PrintJob for this usage
+            var printJob = await FindOrCreatePrintJobAsync(
+                dbContext, printer, usageData, cancellationToken);
+
+            if (printJob is null)
+            {
+                _logger.LogWarning(
+                    "Could not find or create print job for printer {PrinterName}. " +
+                    "No active spool found.",
+                    printer.Name);
+                return;
+            }
+
+            // Calculate grams from mm extruded using spool properties
+            var spool = await dbContext.Spools.FindAsync(
+                new object[] { printJob.SpoolId }, cancellationToken);
+
+            var gramsUsed = CalculateGramsUsed(usageData.MmExtruded, spool);
+
+            await usageService.RecordUsageAsync(
+                printJobId: printJob.Id,
+                spoolId: printJob.SpoolId,
+                printerId: printer.Id,
+                gramsUsed: gramsUsed,
+                mmExtruded: usageData.MmExtruded,
+                notes: $"Moonraker auto-recorded: {usageData.GcodeFileName}",
+                cancellationToken: cancellationToken);
+
+            // Mark job as recorded to prevent duplicates
+            _recordedJobs.Add(deduplicationKey);
+
+            _logger.LogInformation(
+                "Recorded Moonraker usage for printer {PrinterName}: " +
+                "{Mm}mm / {Grams}g, job '{File}'",
+                printer.Name, usageData.MmExtruded, gramsUsed,
+                usageData.GcodeFileName);
+        }
+        catch (HttpRequestException ex)
+        {
+            _logger.LogWarning(ex,
+                "Moonraker API unreachable for printer {PrinterName} ({Host}:{Port}). " +
+                "Will retry next cycle.",
+                printer.Name, printer.HostnameOrIp, printer.Port);
+        }
+        catch (TaskCanceledException) when (cancellationToken.IsCancellationRequested)
+        {
+            // Shutdown requested — rethrow to exit the poll loop
+            throw;
+        }
+        catch (TaskCanceledException ex)
+        {
+            _logger.LogWarning(ex,
+                "Moonraker request timed out for printer {PrinterName} ({Host}:{Port}).",
+                printer.Name, printer.HostnameOrIp, printer.Port);
+        }
+        catch (Exception ex)
+        {
+            _logger.LogError(ex,
+                "Unexpected error polling Moonraker printer {PrinterName}. " +
+                "Continuing to next printer.",
+                printer.Name);
+        }
+    }
+
+    /// <summary>
+    /// Determines if a Moonraker print state indicates a completed job
+    /// that should have its usage recorded.
+    /// </summary>
+    private static bool IsCompleteState(string state) =>
+        state.Equals("complete", StringComparison.OrdinalIgnoreCase) ||
+        state.Equals("completed", StringComparison.OrdinalIgnoreCase);
+
+    /// <summary>
+    /// Finds an existing PrintJob for the current g-code file on this printer,
+    /// or creates a new one. Returns null if no spool is available.
+    /// </summary>
+    private async Task<PrintJob?> FindOrCreatePrintJobAsync(
+        ExtrudexDbContext dbContext,
+        Printer printer,
+        MoonrakerFilamentUsage usageData,
+        CancellationToken cancellationToken)
+    {
+        // Try to find an existing print job for this g-code file on this printer
+        if (!string.IsNullOrEmpty(usageData.GcodeFileName))
+        {
+            var existingJob = await dbContext.PrintJobs
+                .Where(j => j.PrinterId == printer.Id &&
+                            j.GcodeFilePath == usageData.GcodeFileName &&
+                            j.DataSource == DataSource.Moonraker &&
+                            j.Status != JobStatus.Cancelled)
+                .OrderByDescending(j => j.CreatedAt)
+                .FirstOrDefaultAsync(cancellationToken);
+
+            if (existingJob is not null)
+            {
+                // Update the existing job with completion data
+                existingJob.MmExtruded = usageData.MmExtruded;
+                existingJob.GramsDerived = CalculateGramsUsed(
+                    usageData.MmExtruded,
+                    await dbContext.Spools.FindAsync(
+                        new object[] { existingJob.SpoolId }, cancellationToken));
+                existingJob.Status = JobStatus.Completed;
+                existingJob.CompletedAt = usageData.CompletedAt ?? DateTime.UtcNow;
+                existingJob.StartedAt ??= usageData.StartedAt;
+
+                await dbContext.SaveChangesAsync(cancellationToken);
+                return existingJob;
+            }
+        }
+
+        // No existing job — find the first active spool for this printer
+        // via AMS slots, or fall back to any active spool
+        var spool = await FindActiveSpoolForPrinterAsync(dbContext, printer, cancellationToken);
+
+        if (spool is null)
+        {
+            return null;
+        }
+
+        var gramsDerived = CalculateGramsUsed(usageData.MmExtruded, spool);
+
+        var newJob = new PrintJob
+        {
+            PrinterId = printer.Id,
+            SpoolId = spool.Id,
+            PrintName = usageData.GcodeFileName ?? "Moonraker Print",
+            GcodeFilePath = usageData.GcodeFileName,
+            MmExtruded = usageData.MmExtruded,
+            GramsDerived = gramsDerived,
+            FilamentDiameterAtPrintMm = spool.FilamentDiameterMm,
+            MaterialDensityAtPrint = GetMaterialDensity(spool),
+            DataSource = DataSource.Moonraker,
+            Status = JobStatus.Completed,
+            StartedAt = usageData.StartedAt ?? DateTime.UtcNow,
+            CompletedAt = usageData.CompletedAt ?? DateTime.UtcNow,
+            Notes = "Auto-created by Moonraker usage poller"
+        };
+
+        dbContext.PrintJobs.Add(newJob);
+        await dbContext.SaveChangesAsync(cancellationToken);
+
+        return newJob;
+    }
+
+    /// <summary>
+    /// Finds an active spool associated with the printer via AMS slots,
+    /// or falls back to any active spool in the system.
+    /// </summary>
+    private static async Task<Spool?> FindActiveSpoolForPrinterAsync(
+        ExtrudexDbContext dbContext,
+        Printer printer,
+        CancellationToken cancellationToken)
+    {
+        // Try to find a spool loaded in the printer's AMS
+        var amsSpool = await dbContext.AmsSlots
+            .Include(s => s.Spool)
+            .ThenInclude(s => s!.MaterialBase)
+            .Include(s => s.AmsUnit)
+            .Where(s => s.AmsUnit.PrinterId == printer.Id && s.Spool != null && s.Spool.IsActive)
+            .Select(s => s.Spool)
+            .FirstOrDefaultAsync(cancellationToken);
+
+        if (amsSpool is not null)
+            return amsSpool;
+
+        // Fallback: any active spool (for non-AMS printers)
+        return await dbContext.Spools
+            .Include(s => s.MaterialBase)
+            .Where(s => s.IsActive)
+            .OrderByDescending(s => s.WeightRemainingGrams)
+            .FirstOrDefaultAsync(cancellationToken);
+    }
+
+    /// <summary>
+    /// Calculates grams used from mm extruded using the spool's filament
+    /// diameter and the material density.
+    /// Formula: grams = mm × π × (diameter/2)² × density
+    /// Where density is in g/cm³, diameter in mm, giving grams.
+    /// </summary>
+    private static decimal CalculateGramsUsed(decimal mmExtruded, Spool? spool)
+    {
+        if (spool is null)
+            return 0m;
+
+        var diameterMm = spool.FilamentDiameterMm;
+        var densityGcm3 = GetMaterialDensity(spool);
+
+        // Cross-section area (mm²) = π × (diameter/2)²
+        var radiusMm = diameterMm / 2m;
+        var crossSectionArea = Math.PI * (double)radiusMm * (double)radiusMm;
+
+        // Volume (mm³) = mm_extruded × cross_section_area
+        // Convert mm³ to cm³: 1 cm³ = 1000 mm³
+        // Weight (g) = volume_cm³ × density (g/cm³)
+        var volumeMm3 = (double)mmExtruded * crossSectionArea;
+        var volumeCm3 = volumeMm3 / 1000.0;
+        var grams = volumeCm3 * (double)densityGcm3;
+
+        return Math.Round((decimal)grams, 2);
+    }
+
+    /// <summary>
+    /// Returns the material density for the spool's material base.
+    /// Falls back to 1.24 g/cm³ (typical PLA density) if not available.
+    /// </summary>
+    private static decimal GetMaterialDensity(Spool? spool)
+    {
+        // Standard material densities (g/cm³)
+        // These would ideally come from the MaterialBase entity,
+        // but we use sensible defaults for the initial integration.
+        return spool?.MaterialBase?.Name?.ToUpperInvariant() switch
+        {
+            "PLA" => 1.24m,
+            "PETG" => 1.27m,
+            "ABS" => 1.04m,
+            "ASA" => 1.07m,
+            "TPU" => 1.21m,
+            "NYLON" or "PA" => 1.13m,
+            "PC" => 1.20m,
+            _ => 1.24m // Default to PLA density
+        };
+    }
+}

backend/Infrastructure/Services/UsageLogService.cs

@@ -1,81 +0,0 @@
-using Extrudex.Domain.Entities;
-using Extrudex.Domain.Enums;
-using Extrudex.Domain.Interfaces;
-using Extrudex.Infrastructure.Data;
-using Microsoft.EntityFrameworkCore;
-
-namespace Extrudex.Infrastructure.Services;
-
-/// <summary>
-/// Implementation of <see cref="IUsageLogService"/> that persists usage entries
-/// to the usage_logs table via EF Core.
-/// </summary>
-public class UsageLogService : IUsageLogService
-{
-    private readonly ExtrudexDbContext _dbContext;
-
-    /// <summary>
-    /// Initializes a new instance of the <see cref="UsageLogService"/> class.
-    /// </summary>
-    /// <param name="dbContext">The EF Core database context for data persistence.</param>
-    public UsageLogService(ExtrudexDbContext dbContext)
-    {
-        _dbContext = dbContext;
-    }
-
-    /// <inheritdoc/>
-    public async Task<UsageLog> RecordUsageAsync(
-        Guid spoolId,
-        decimal gramsUsed,
-        DataSource dataSource,
-        Guid? printerId = null,
-        Guid? printJobId = null,
-        decimal? mmExtruded = null,
-        DateTime? usageTimestamp = null,
-        string? notes = null)
-    {
-        var entry = new UsageLog
-        {
-            SpoolId = spoolId,
-            GramsUsed = gramsUsed,
-            DataSource = dataSource,
-            PrinterId = printerId,
-            PrintJobId = printJobId,
-            MmExtruded = mmExtruded,
-            UsageTimestamp = usageTimestamp ?? DateTime.UtcNow,
-            Notes = notes
-        };
-
-        _dbContext.UsageLogs.Add(entry);
-        await _dbContext.SaveChangesAsync();
-
-        return entry;
-    }
-
-    /// <inheritdoc/>
-    public async Task<IEnumerable<UsageLog>> GetBySpoolAsync(Guid spoolId, CancellationToken cancellationToken = default)
-    {
-        return await _dbContext.UsageLogs
-            .Where(u => u.SpoolId == spoolId)
-            .OrderByDescending(u => u.UsageTimestamp)
-            .ToListAsync(cancellationToken);
-    }
-
-    /// <inheritdoc/>
-    public async Task<IEnumerable<UsageLog>> GetByPrinterAsync(Guid printerId, CancellationToken cancellationToken = default)
-    {
-        return await _dbContext.UsageLogs
-            .Where(u => u.PrinterId == printerId)
-            .OrderByDescending(u => u.UsageTimestamp)
-            .ToListAsync(cancellationToken);
-    }
-
-    /// <inheritdoc/>
-    public async Task<IEnumerable<UsageLog>> GetByPrintJobAsync(Guid printJobId, CancellationToken cancellationToken = default)
-    {
-        return await _dbContext.UsageLogs
-            .Where(u => u.PrintJobId == printJobId)
-            .OrderByDescending(u => u.UsageTimestamp)
-            .ToListAsync(cancellationToken);
-    }
-}

backend/Program.cs

@@ -1,9 +1,8 @@
 using System.Reflection;
+using System.Net.Http.Headers;
 using Extrudex.API.Filters;
 using Extrudex.API.Hubs;
-using Extrudex.API.Jobs;
 using Extrudex.Domain.Interfaces;
-using Extrudex.Infrastructure.Configuration;
 using Extrudex.Infrastructure.Data;
 using Extrudex.Infrastructure.Services;
 using FluentValidation;
@@ -52,14 +51,22 @@ builder.Services.AddSwaggerGen(c =>
 // ── QR Code Generation ──────────────────────────────────────
 builder.Services.AddSingleton<IQrCodeService, QrCodeService>();
 
-// ── Cost Per Print Calculation ─────────────────────────────
-builder.Services.AddScoped<ICostPerPrintService, CostPerPrintService>();
+// ── Filament Usage Service ──────────────────────────────────
+builder.Services.AddScoped<IFilamentUsageService, FilamentUsageService>();
 
-// ── Low Stock Detection ────────────────────────────────────
-builder.Services.AddSingleton<ILowStockDetector, LowStockDetector>();
+// ── Moonraker Client ───────────────────────────────────────
+// Named HttpClient for Moonraker API calls with configurable timeout.
+// Poller timeout is driven by MoonrakerPollerOptions.RequestTimeout.
+builder.Services.AddHttpClient<IMoonrakerClient, MoonrakerClient>(client =>
+{
+    client.DefaultRequestHeaders.Accept.Add(
+        new MediaTypeWithQualityHeaderValue("application/json"));
+});
 
-// ── Usage Logging ───────────────────────────────────────────
-builder.Services.AddScoped<IUsageLogService, UsageLogService>();
+// ── Moonraker Usage Poller (Background Service) ─────────────
+builder.Services.Configure<MoonrakerPollerOptions>(
+    builder.Configuration.GetSection("MoonrakerPoller"));
+builder.Services.AddHostedService<MoonrakerUsagePoller>();
 
 // ── FluentValidation ──────────────────────────────────────
 // Registers all validators from the API assembly into DI.
@@ -88,22 +95,6 @@ builder.Services.AddCors(options =>
 // ── SignalR (real-time printer updates) ────────────────────
 builder.Services.AddSignalR();
 
-// ── Filament Usage Sync (Background Job) ──────────────────
-builder.Services.Configure<FilamentUsageSyncOptions>(
-    builder.Configuration.GetSection(FilamentUsageSyncOptions.SectionName));
-builder.Services.AddHttpClient<IMoonrakerClient, MoonrakerClient>(client =>
-{
-    client.DefaultRequestHeaders.Add("User-Agent", "Extrudex/1.0");
-});
-builder.Services.AddScoped<IFilamentUsageSyncService, FilamentUsageSyncService>();
-builder.Services.AddHostedService<FilamentUsageSyncJob>();
-
-// ── Moonraker Printer Sync (Background Service) ──────────
-builder.Services.Configure<MoonrakerPrinterSyncOptions>(
-    builder.Configuration.GetSection(MoonrakerPrinterSyncOptions.SectionName));
-builder.Services.AddScoped<IMoonrakerPrinterSyncService, MoonrakerPrinterSyncService>();
-builder.Services.AddHostedService<MoonrakerPrinterSyncJob>();
-
 // ── Health Checks ───────────────────────────────────────────
 builder.Services.AddHealthChecks()
     .AddNpgSql(connectionString);

backend/appsettings.Development.json

@@ -8,10 +8,5 @@
   },
   "ConnectionStrings": {
     "ExtrudexDb": "Host=localhost;Port=5432;Database=extrudex_dev;Username=extrudex;Password=changeme"
-  },
-  "FilamentUsageSync": {
-    "PollingInterval": "00:01:00",
-    "RequestTimeout": "00:00:30",
-    "Enabled": true
   }
 }

backend/appsettings.json

@@ -10,18 +10,9 @@
   "ConnectionStrings": {
     "ExtrudexDb": "Host=localhost;Port=5432;Database=extrudex;Username=extrudex;Password=changeme"
   },
-  "FilamentUsageSync": {
-    "PollingInterval": "00:05:00",
-    "RequestTimeout": "00:00:30",
-    "Enabled": true
-  },
-  "MoonrakerPrinterSync": {
-    "PollingInterval": "00:01:00",
-    "RequestTimeout": "00:00:15",
+  "MoonrakerPoller": {
     "Enabled": true,
-    "HistoryBatchSize": 25
-  },
-  "FilamentAlerts": {
-    "LowStockThresholdPercent": 20
+    "PollInterval": "00:00:30",
+    "RequestTimeout": "00:00:10"
   }
 }

deploy.sh

@@ -18,14 +18,13 @@ echo "📦 Building and starting services..."
 $COMPOSE_CMD -f docker-compose.dev.yml up -d --build
 
 echo "⏳ Waiting for services to become healthy..."
-sleep 15
+sleep 10
 
 echo "✅ Deployment complete!"
 echo ""
 echo "Services running:"
-echo "  • PostgreSQL:    localhost:5433"
 echo "  • Extrudex API: http://localhost:5080"
-echo "  • Extrudex Web: http://localhost:5081"
+echo "  • Control Center Web: http://localhost:5081"
 echo ""
 echo "To view logs:"
 echo "  $COMPOSE_CMD -f docker-compose.dev.yml logs -f"

docker-compose.dev.yml

@@ -1,25 +1,6 @@
-services:
-  extrudex-db:
-    image: postgres:16-alpine
-    container_name: extrudex-db
-    environment:
-      POSTGRES_USER: extrudex
-      POSTGRES_PASSWORD: changeme
-      POSTGRES_DB: extrudex
-    ports:
-      - "5433:5432"
-    volumes:
-      - extrudex-db-data:/var/lib/postgresql/data
-    healthcheck:
-      test: ["CMD-SHELL", "pg_isready -U extrudex"]
-      interval: 10s
-      timeout: 5s
-      retries: 5
-      start_period: 10s
-    restart: unless-stopped
-    networks:
-      - extrudex-network
+version: '3.8'
 
+services:
   extrudex-api:
     build:
       context: ./backend
@@ -30,14 +11,6 @@ services:
     environment:
       - ASPNETCORE_ENVIRONMENT=Development
       - ASPNETCORE_URLS=http://+:8080
-      - EXTRUDEX_DB_HOST=extrudex-db
-      - EXTRUDEX_DB_PORT=5432
-      - EXTRUDEX_DB_NAME=extrudex
-      - EXTRUDEX_DB_USER=extrudex
-      - EXTRUDEX_DB_PASSWORD=changeme
-    depends_on:
-      extrudex-db:
-        condition: service_healthy
     restart: unless-stopped
     healthcheck:
       test: ["CMD", "curl", "-f", "http://localhost:8080/health"]
@@ -48,11 +21,11 @@ services:
     networks:
       - extrudex-network
 
-  extrudex-web:
+  control-center-web:
     build:
-      context: ./frontend
+      context: ../Control-Center/frontend
       dockerfile: Dockerfile
-    container_name: extrudex-web
+    container_name: control-center-web
     ports:
       - "5081:80"
     depends_on:
@@ -62,9 +35,6 @@ services:
     networks:
       - extrudex-network
 
-volumes:
-  extrudex-db-data:
-
 networks:
   extrudex-network:
     driver: bridge

frontend/package-lock.json

@@ -8,6 +8,7 @@
       "name": "frontend",
       "version": "0.0.0",
       "dependencies": {
+        "@angular/animations": "^21.2.10",
         "@angular/cdk": "^21.2.8",
         "@angular/common": "^21.2.0",
         "@angular/compiler": "^21.2.0",
@@ -326,6 +327,21 @@
         "yarn": ">= 1.13.0"
       }
     },
+    "node_modules/@angular/animations": {
+      "version": "21.2.10",
+      "resolved": "https://registry.npmjs.org/@angular/animations/-/animations-21.2.10.tgz",
+      "integrity": "sha512-sIzAcxwtRCJ/fu0tK4mo1ooiEaDxJ+Nl6s9nK1D1NP1em12VX03Jx8CMixp/kVtgh4mZnm1x6psBB0FUz3U3Ug==",
+      "license": "MIT",
+      "dependencies": {
+        "tslib": "^2.3.0"
+      },
+      "engines": {
+        "node": "^20.19.0 || ^22.12.0 || >=24.0.0"
+      },
+      "peerDependencies": {
+        "@angular/core": "21.2.10"
+      }
+    },
     "node_modules/@angular/build": {
       "version": "21.2.8",
       "resolved": "https://registry.npmjs.org/@angular/build/-/build-21.2.8.tgz",

frontend/package.json

@@ -11,6 +11,7 @@
   "private": true,
   "packageManager": "npm@11.11.0",
   "dependencies": {
+    "@angular/animations": "^21.2.10",
     "@angular/cdk": "^21.2.8",
     "@angular/common": "^21.2.0",
     "@angular/compiler": "^21.2.0",

frontend/src/app/app.config.ts

@@ -1,6 +1,7 @@
 import { ApplicationConfig, provideBrowserGlobalErrorListeners } from '@angular/core';
 import { provideRouter } from '@angular/router';
-import { provideHttpClient } from '@angular/common/http';
+import { provideHttpClient, withFetch } from '@angular/common/http';
+import { provideAnimationsAsync } from '@angular/platform-browser/animations/async';
 
 import { routes } from './app.routes';
 
@@ -8,6 +9,7 @@ export const appConfig: ApplicationConfig = {
   providers: [
     provideBrowserGlobalErrorListeners(),
     provideRouter(routes),
-    provideHttpClient(),
+    provideHttpClient(withFetch()),
+    provideAnimationsAsync(),
   ]
 };

frontend/src/app/app.html

@@ -5,9 +5,6 @@
   <!-- Status Summary Bar — fleet-wide health at a glance -->
   <app-dashboard-summary></app-dashboard-summary>
 
-  <!-- Inventory Summary — filament metrics at a glance -->
-  <app-inventory-summary></app-inventory-summary>
-
   <!-- Filament Inventory — routed view -->
   <router-outlet />
 </main>

frontend/src/app/app.ts

@@ -1,12 +1,11 @@
 import { Component, ViewChild } from '@angular/core';
 import { RouterOutlet } from '@angular/router';
 import { DashboardSummaryComponent } from './components/dashboard-summary/dashboard-summary.component';
-import { InventorySummaryComponent } from './components/inventory-summary/inventory-summary.component';
 import { AgentSummary, SystemHealth } from './models/agent.model';
 
 @Component({
   selector: 'app-root',
-  imports: [RouterOutlet, DashboardSummaryComponent, InventorySummaryComponent],
+  imports: [RouterOutlet, DashboardSummaryComponent],
   templateUrl: './app.html',
   styleUrl: './app.scss'
 })

frontend/src/app/components/delete-filament-dialog/delete-filament-dialog.component.html

@@ -0,0 +1,78 @@
+<!-- Delete Filament Confirmation Dialog -->
+<h2 mat-dialog-title>
+  <mat-icon aria-hidden="true">warning</mat-icon>
+  Delete Filament Spool?
+</h2>
+
+<mat-dialog-content>
+  <p class="dialog-description">
+    You are about to permanently remove this filament spool from inventory.
+  </p>
+
+  <!-- Spool details card -->
+  <div class="spool-details" role="list" aria-label="Spool details">
+    <div class="detail-row" role="listitem">
+      <span class="detail-label">Material</span>
+      <span class="detail-value">{{ filament.materialBaseName }}{{ filament.materialFinishName ? ' — ' + filament.materialFinishName : '' }}{{ filament.materialModifierName ? ' (' + filament.materialModifierName + ')' : '' }}</span>
+    </div>
+
+    <div class="detail-row" role="listitem">
+      <span class="detail-label">Brand</span>
+      <span class="detail-value">{{ filament.brand }}</span>
+    </div>
+
+    <div class="detail-row" role="listitem">
+      <span class="detail-label">Color</span>
+      <span class="detail-value color-value">
+        <span class="color-swatch-inline"
+              [style.background-color]="filament.colorHex"
+              [attr.aria-label]="filament.colorName">
+        </span>
+        {{ filament.colorName }}
+      </span>
+    </div>
+
+    <div class="detail-row" role="listitem">
+      <span class="detail-label">Serial</span>
+      <span class="detail-value serial-value">{{ filament.spoolSerial }}</span>
+    </div>
+
+    <div class="detail-row" role="listitem">
+      <span class="detail-label">Remaining</span>
+      <span class="detail-value">{{ formatWeight(filament.weightRemainingGrams) }} / {{ formatWeight(filament.weightTotalGrams) }}</span>
+    </div>
+
+    <div class="detail-row" role="listitem">
+      <span class="detail-label">Status</span>
+      <span class="detail-value">
+        <span class="status-badge"
+              [class.active]="filament.isActive"
+              [class.inactive]="!filament.isActive">
+          {{ filament.isActive ? 'Active' : 'Inactive' }}
+        </span>
+      </span>
+    </div>
+  </div>
+
+  <p class="dialog-warning">
+    <mat-icon aria-hidden="true">info</mat-icon>
+    This action cannot be undone.
+  </p>
+</mat-dialog-content>
+
+<mat-dialog-actions align="end">
+  <button mat-button
+          type="button"
+          (click)="onCancel()"
+          class="cancel-button">
+    Cancel
+  </button>
+  <button mat-flat-button
+          type="button"
+          color="warn"
+          (click)="onConfirm()"
+          class="confirm-button">
+    <mat-icon aria-hidden="true">delete</mat-icon>
+    Delete Spool
+  </button>
+</mat-dialog-actions>

frontend/src/app/components/delete-filament-dialog/delete-filament-dialog.component.scss

@@ -0,0 +1,150 @@
+/**
+ * Delete Filament Dialog Styles
+ * Touch-optimized confirmation dialog for spool removal
+ */
+
+$spacing-unit: 8px;
+$color-critical: #ef4444;
+$color-inactive: #94a3b8;
+$color-active: #22c55e;
+
+// Dialog title
+h2[mat-dialog-title] {
+  display: flex;
+  align-items: center;
+  gap: $spacing-unit;
+  color: $color-critical;
+
+  mat-icon {
+    font-size: 24px !important;
+    width: 24px !important;
+    height: 24px !important;
+  }
+}
+
+// Description text
+.dialog-description {
+  margin: 0 0 $spacing-unit * 2;
+  font-size: 14px;
+  line-height: 1.5;
+  color: var(--mat-sys-on-surface);
+}
+
+// Spool details card
+.spool-details {
+  display: flex;
+  flex-direction: column;
+  gap: $spacing-unit;
+  padding: $spacing-unit * 1.5;
+  background-color: var(--mat-sys-surface-container);
+  border-radius: 8px;
+  margin-bottom: $spacing-unit * 2;
+}
+
+.detail-row {
+  display: flex;
+  justify-content: space-between;
+  align-items: center;
+  padding: $spacing-unit * 0.5 0;
+  font-size: 14px;
+
+  &:not(:last-child) {
+    border-bottom: 1px solid var(--mat-sys-outline-variant);
+    padding-bottom: $spacing-unit;
+  }
+}
+
+.detail-label {
+  font-weight: 500;
+  color: var(--mat-sys-on-surface-variant);
+  flex-shrink: 0;
+}
+
+.detail-value {
+  font-weight: 400;
+  color: var(--mat-sys-on-surface);
+  text-align: right;
+}
+
+// Color swatch inline
+.color-swatch-inline {
+  display: inline-block;
+  width: 18px;
+  height: 18px;
+  border-radius: 50%;
+  border: 1.5px solid rgba(0, 0, 0, 0.12);
+  vertical-align: middle;
+  margin-right: 4px;
+}
+
+.color-value {
+  display: flex;
+  align-items: center;
+  justify-content: flex-end;
+  gap: 4px;
+}
+
+// Serial value — monospace
+.serial-value {
+  font-family: 'JetBrains Mono', 'Roboto Mono', monospace;
+  font-size: 13px;
+  letter-spacing: 0.02em;
+}
+
+// Status badge — matches filament table styling
+.status-badge {
+  display: inline-flex;
+  align-items: center;
+  padding: 2px 8px;
+  border-radius: 10px;
+  font-size: 11px;
+  font-weight: 600;
+  text-transform: uppercase;
+  letter-spacing: 0.04em;
+
+  &.active {
+    background-color: rgba($color-active, 0.12);
+    color: $color-active;
+  }
+
+  &.inactive {
+    background-color: rgba($color-inactive, 0.12);
+    color: $color-inactive;
+  }
+}
+
+// Warning text
+.dialog-warning {
+  display: flex;
+  align-items: center;
+  gap: $spacing-unit;
+  margin: 0;
+  font-size: 13px;
+  color: $color-critical;
+
+  mat-icon {
+    font-size: 18px !important;
+    width: 18px !important;
+    height: 18px !important;
+  }
+}
+
+// Dialog action buttons
+mat-dialog-actions {
+  padding-top: $spacing-unit * 2;
+
+  .cancel-button {
+    min-width: 80px;
+  }
+
+  .confirm-button {
+    min-width: 120px;
+
+    mat-icon {
+      font-size: 18px !important;
+      width: 18px !important;
+      height: 18px !important;
+      margin-right: 4px;
+    }
+  }
+}

frontend/src/app/components/delete-filament-dialog/delete-filament-dialog.component.ts

@@ -0,0 +1,68 @@
+import { ChangeDetectionStrategy, Component, inject } from '@angular/core';
+import { CommonModule } from '@angular/common';
+import {
+  MAT_DIALOG_DATA,
+  MatDialogRef,
+  MatDialogModule,
+} from '@angular/material/dialog';
+import { MatButtonModule } from '@angular/material/button';
+import { MatIconModule } from '@angular/material/icon';
+import { MatChipsModule } from '@angular/material/chips';
+
+import { Filament } from '../../models/filament.model';
+
+/**
+ * Data passed into the delete confirmation dialog.
+ */
+export interface DeleteFilamentDialogData {
+  filament: Filament;
+}
+
+/**
+ * Delete confirmation dialog for filament spool removal.
+ *
+ * Displays spool details (material, brand, color, serial, remaining weight)
+ * and requires the user to confirm before deletion proceeds.
+ * Cancel dismisses the dialog with no action.
+ */
+@Component({
+  selector: 'app-delete-filament-dialog',
+  standalone: true,
+  imports: [
+    CommonModule,
+    MatDialogModule,
+    MatButtonModule,
+    MatIconModule,
+    MatChipsModule,
+  ],
+  templateUrl: './delete-filament-dialog.component.html',
+  styleUrl: './delete-filament-dialog.component.scss',
+  changeDetection: ChangeDetectionStrategy.OnPush,
+})
+export class DeleteFilamentDialogComponent {
+  private readonly dialogRef = inject(
+    MatDialogRef<DeleteFilamentDialogComponent, boolean>
+  );
+  readonly data: DeleteFilamentDialogData = inject(MAT_DIALOG_DATA);
+
+  /** The filament spool being considered for deletion */
+  readonly filament = this.data.filament;
+
+  /** Format weight for display in dialog */
+  formatWeight(grams: number): string {
+    if (grams >= 1000) {
+      return `${(grams / 1000).toFixed(1)}kg`;
+    }
+    return `${Math.round(grams)}g`;
+  }
+
+  /** Cancel — close dialog with false (no deletion) */
+  onCancel(): void {
+    this.dialogRef.close(false);
+  }
+
+  /** Confirm — close dialog with true (proceed with deletion) */
+  onConfirm(): void {
+    this.dialogRef.close(true);
+  }
+}

frontend/src/app/components/filament-filter/filament-filter.component.html

@@ -1,76 +0,0 @@
-<!-- Filament Filter Bar — material type, color search, low stock, active-only -->
-<div class="filament-filter-bar" role="search" aria-label="Filter filament inventory">
-
-  <!-- Material Type Multi-Select -->
-  <mat-form-field appearance="outline" class="filter-field material-filter">
-    <mat-label>Material</mat-label>
-    <mat-select multiple
-                [value]="selectedMaterials()"
-                (selectionChange)="onMaterialChange($event.value)"
-                aria-label="Filter by material type">
-      @for (material of materialOptions(); track material) {
-        <mat-option [value]="material">{{ material }}</mat-option>
-      }
-    </mat-select>
-    @if (selectedMaterials().length > 0) {
-      <mat-chip-set class="selected-chips" matSuffix>
-        @for (mat of selectedMaterials(); track mat) {
-          <mat-chip (removed)="removeMaterial(mat)"
-                    class="filter-chip">
-            <span>{{ mat }}</span>
-            <mat-icon matChipRemove>cancel</mat-icon>
-          </mat-chip>
-        }
-      </mat-chip-set>
-    }
-  </mat-form-field>
-
-  <!-- Color Search -->
-  <mat-form-field appearance="outline" class="filter-field color-filter">
-    <mat-label>Color</mat-label>
-    <input matInput
-           type="text"
-           [value]="colorSearch()"
-           (input)="onColorSearchChange($any($event.target).value)"
-           placeholder="Search color..."
-           aria-label="Filter by color name" />
-    @if (colorSearch().trim()) {
-      <mat-icon matSuffix class="filter-active-icon">filter_list</mat-icon>
-    }
-  </mat-form-field>
-
-  <!-- Low Stock Toggle -->
-  <mat-checkbox [checked]="lowStockOnly()"
-                (change)="onLowStockToggle($event.checked)"
-                class="filter-checkbox"
-                aria-label="Show low stock only"
-                matTooltip="Show only spools at 25% or less remaining"
-                matTooltipPosition="below">
-    <mat-icon class="checkbox-icon" [class.active]="lowStockOnly()">warning</mat-icon>
-    Low Stock
-  </mat-checkbox>
-
-  <!-- Active Only Toggle -->
-  <mat-checkbox [checked]="activeOnly()"
-                (change)="onActiveOnlyToggle($event.checked)"
-                class="filter-checkbox"
-                aria-label="Show active spools only"
-                matTooltip="Show only spools currently in use"
-                matTooltipPosition="below">
-    <mat-icon class="checkbox-icon" [class.active]="activeOnly()">check_circle</mat-icon>
-    Active Only
-  </mat-checkbox>
-
-  <!-- Clear All Filters -->
-  @if (hasActiveFilters()) {
-    <button mat-button
-            class="clear-filters-btn"
-            (click)="clearAll()"
-            aria-label="Clear all filters"
-            matTooltip="Remove all filters"
-            matTooltipPosition="below">
-      <mat-icon>filter_alt_off</mat-icon>
-      Clear
-    </button>
-  }
-</div>

frontend/src/app/components/filament-filter/filament-filter.component.scss

@@ -1,134 +0,0 @@
-/**
- * Filament Filter Bar Styles
- * Responsive filter layout for kiosk and mobile
- */
-
-$spacing-unit: 8px;
-
-.filament-filter-bar {
-  display: flex;
-  align-items: center;
-  gap: $spacing-unit * 2;
-  flex-wrap: wrap;
-  padding: $spacing-unit * 2 0;
-  margin-bottom: $spacing-unit * 2;
-}
-
-// Form field sizing
-.filter-field {
-  flex: 0 1 auto;
-  min-width: 160px;
-
-  &.material-filter {
-    min-width: 200px;
-  }
-
-  &.color-filter {
-    min-width: 180px;
-  }
-
-  // Reduce vertical spacing inside filter fields
-  .mat-mdc-form-field-subscript-wrapper {
-    display: none; // No hint/error text needed for filters
-  }
-}
-
-// Selected material chips
-.selected-chips {
-  flex-wrap: wrap;
-  gap: 4px;
-}
-
-.filter-chip {
-  font-size: 12px !important;
-  min-height: 24px !important;
-
-  mat-icon {
-    font-size: 14px !important;
-    width: 14px !important;
-    height: 14px !important;
-  }
-}
-
-// Active filter icon
-.filter-active-icon {
-  color: var(--mat-sys-primary);
-  font-size: 18px !important;
-  width: 18px !important;
-  height: 18px !important;
-}
-
-// Checkbox styling
-.filter-checkbox {
-  display: flex;
-  align-items: center;
-  gap: 4px;
-  white-space: nowrap;
-  user-select: none;
-  touch-action: manipulation; // Prevent zoom on double-tap
-
-  .checkbox-icon {
-    font-size: 18px !important;
-    width: 18px !important;
-    height: 18px !important;
-    color: var(--mat-sys-on-surface-variant);
-    transition: color 0.2s ease;
-
-    &.active {
-      color: var(--mat-sys-primary);
-    }
-  }
-}
-
-// Clear filters button
-.clear-filters-btn {
-  display: flex;
-  align-items: center;
-  gap: 4px;
-  font-size: 13px;
-
-  mat-icon {
-    font-size: 18px !important;
-    width: 18px !important;
-    height: 18px !important;
-  }
-}
-
-// Responsive: stack filters vertically on small screens
-@media (max-width: 768px) {
-  .filament-filter-bar {
-    flex-direction: column;
-    align-items: stretch;
-    gap: $spacing-unit;
-  }
-
-  .filter-field {
-    width: 100%;
-    min-width: unset;
-
-    &.material-filter,
-    &.color-filter {
-      min-width: unset;
-    }
-  }
-
-  .filter-checkbox {
-    padding: $spacing-unit 0;
-  }
-
-  .clear-filters-btn {
-    align-self: flex-start;
-  }
-}
-
-// Extra-small screens (phone portrait)
-@media (max-width: 480px) {
-  .filament-filter-bar {
-    padding: $spacing-unit 0;
-    margin-bottom: $spacing-unit;
-  }
-
-  .filter-checkbox {
-    font-size: 13px;
-  }
-}

frontend/src/app/components/filament-filter/filament-filter.component.ts

@@ -1,158 +0,0 @@
-import {
-  ChangeDetectionStrategy,
-  Component,
-  EventEmitter,
-  Input,
-  Output,
-  computed,
-  signal,
-} from '@angular/core';
-import { CommonModule } from '@angular/common';
-import { FormsModule } from '@angular/forms';
-import { MatFormFieldModule } from '@angular/material/form-field';
-import { MatSelectModule } from '@angular/material/select';
-import { MatInputModule } from '@angular/material/input';
-import { MatCheckboxModule } from '@angular/material/checkbox';
-import { MatIconModule } from '@angular/material/icon';
-import { MatChipsModule } from '@angular/material/chips';
-import { MatButtonModule } from '@angular/material/button';
-import { MatTooltipModule } from '@angular/material/tooltip';
-import {
-  Filament,
-  StockLevel,
-  classifyStockLevel,
-} from '../../models/filament.model';
-
-/** Filter state emitted by the filament filter component */
-export interface FilamentFilterState {
-  /** Selected material base names — empty means all */
-  materialBaseNames: string[];
-
-  /** Color search text — empty string means all */
-  colorSearch: string;
-
-  /** Whether to show only low/critical stock */
-  lowStockOnly: boolean;
-
-  /** Whether to show only active spools */
-  activeOnly: boolean;
-}
-
-/**
- * FilamentFilterComponent — Filter bar for the filament inventory list.
- *
- * Provides:
- * - Material type multi-select filter
- * - Color name text search
- * - Low stock toggle (shows only critical/low spools)
- * - Active-only toggle
- * - Clear all filters action
- */
-@Component({
-  selector: 'app-filament-filter',
-  standalone: true,
-  imports: [
-    CommonModule,
-    FormsModule,
-    MatFormFieldModule,
-    MatSelectModule,
-    MatInputModule,
-    MatCheckboxModule,
-    MatIconModule,
-    MatChipsModule,
-    MatButtonModule,
-    MatTooltipModule,
-  ],
-  templateUrl: './filament-filter.component.html',
-  styleUrl: './filament-filter.component.scss',
-  changeDetection: ChangeDetectionStrategy.OnPush,
-})
-export class FilamentFilterComponent {
-  /** Filament data input — used to derive material options */
-  @Input() set filaments(value: Filament[]) {
-    this._filaments.set(value);
-    const materials = [...new Set(value.map((f) => f.materialBaseName))].sort();
-    this.materialOptions.set(materials);
-  }
-  get filaments(): Filament[] {
-    return this._filaments();
-  }
-  private readonly _filaments = signal<Filament[]>([]);
-
-  /** Available material base names derived from filament data */
-  readonly materialOptions = signal<string[]>([]);
-
-  /** Selected material base names */
-  readonly selectedMaterials = signal<string[]>([]);
-
-  /** Color search text */
-  readonly colorSearch = signal('');
-
-  /** Low stock only toggle */
-  readonly lowStockOnly = signal(false);
-
-  /** Active only toggle */
-  readonly activeOnly = signal(false);
-
-  /** Computed: whether any filters are active */
-  readonly hasActiveFilters = computed(
-    () =>
-      this.selectedMaterials().length > 0 ||
-      this.colorSearch().trim().length > 0 ||
-      this.lowStockOnly() ||
-      this.activeOnly()
-  );
-
-  /** Emits the current filter state whenever filters change */
-  @Output() readonly filterChange = new EventEmitter<FilamentFilterState>();
-
-  /** Handle material selection change */
-  onMaterialChange(selected: string[]): void {
-    this.selectedMaterials.set(selected);
-    this.emitFilterState();
-  }
-
-  /** Handle color search input */
-  onColorSearchChange(value: string): void {
-    this.colorSearch.set(value);
-    this.emitFilterState();
-  }
-
-  /** Handle low stock toggle */
-  onLowStockToggle(checked: boolean): void {
-    this.lowStockOnly.set(checked);
-    this.emitFilterState();
-  }
-
-  /** Handle active-only toggle */
-  onActiveOnlyToggle(checked: boolean): void {
-    this.activeOnly.set(checked);
-    this.emitFilterState();
-  }
-
-  /** Remove a single material chip */
-  removeMaterial(material: string): void {
-    const updated = this.selectedMaterials().filter((m) => m !== material);
-    this.selectedMaterials.set(updated);
-    this.emitFilterState();
-  }
-
-  /** Clear all filters */
-  clearAll(): void {
-    this.selectedMaterials.set([]);
-    this.colorSearch.set('');
-    this.lowStockOnly.set(false);
-    this.activeOnly.set(false);
-    this.emitFilterState();
-  }
-
-  /** Emit the current filter state */
-  private emitFilterState(): void {
-    this.filterChange.emit({
-      materialBaseNames: this.selectedMaterials(),
-      colorSearch: this.colorSearch().trim().toLowerCase(),
-      lowStockOnly: this.lowStockOnly(),
-      activeOnly: this.activeOnly(),
-    });
-  }
-}

frontend/src/app/components/filament-table/filament-table.component.html

@@ -1,12 +1,6 @@
-<!-- Filament Inventory Table — with filters and low stock indicators -->
+<!-- Filament Inventory Table — with low stock indicators and delete actions -->
 <div class="filament-table-container" role="region" aria-label="Filament inventory">
 
-  <!-- Filter Bar -->
-  <app-filament-filter
-    [filaments]="allFilaments()"
-    (filterChange)="onFilterChange($event)"
-    aria-label="Filter filament inventory" />
-
   <!-- Low Stock Alert Banner — shown when critical or low stock spools exist -->
   @if (criticalCount() > 0) {
     <div class="alert-banner critical" role="alert">
@@ -22,7 +16,7 @@
 
   <!-- Filament Table -->
   <table mat-table
-         [dataSource]="filteredFilaments()"
+         [dataSource]="sortedFilaments()"
          matSort
          (matSortChange)="sortData($event)"
          class="filament-table"
@@ -83,35 +77,6 @@
       </td>
     </ng-container>
 
-    <!-- Cost Column -->
-    <ng-container matColumnDef="cost">
-      <th mat-header-cell *matHeaderCellDef mat-sort-header="cost">Cost</th>
-      <td mat-cell *matCellDef="let filament">
-        <div class="cost-cell">
-          @if (filament.purchasePrice !== null) {
-            <span class="cost-price">{{ formatCurrency(filament.purchasePrice) }}</span>
-            @let cpg = getCostPerGram(filament);
-            @if (cpg !== null) {
-              <span class="cost-per-gram">${{ cpg.toFixed(2) }}/g</span>
-            }
-          } @else {
-            <span class="cost-unknown">&mdash;</span>
-          }
-        </div>
-      </td>
-    </ng-container>
-
-    <!-- Usage Column -->
-    <ng-container matColumnDef="usage">
-      <th mat-header-cell *matHeaderCellDef mat-sort-header="usage">Usage</th>
-      <td mat-cell *matCellDef="let filament">
-        <div class="usage-cell">
-          <span class="usage-grams">{{ formatWeight(getGramsUsed(filament)) }} used</span>
-          <span class="usage-remaining">{{ formatWeight(filament.weightRemainingGrams) }} left</span>
-        </div>
-      </td>
-    </ng-container>
-
     <!-- Stock Level Indicator Column -->
     <ng-container matColumnDef="stockLevel">
       <th mat-header-cell *matHeaderCellDef mat-sort-header="stockLevel">Stock</th>
@@ -141,22 +106,36 @@
       </td>
     </ng-container>
 
+    <!-- Actions Column — delete button -->
+    <ng-container matColumnDef="actions">
+      <th mat-header-cell *matHeaderCellDef>Actions</th>
+      <td mat-cell *matCellDef="let filament">
+        <button mat-icon-button
+                type="button"
+                color="warn"
+                [attr.aria-label]="'Delete ' + filament.materialBaseName + ' — ' + filament.colorName"
+                matTooltip="Delete spool"
+                matTooltipPosition="above"
+                [disabled]="deleting() === filament.id"
+                (click)="onDeleteClick(filament)">
+          @if (deleting() === filament.id) {
+            <mat-icon aria-hidden="true">hourglass_empty</mat-icon>
+          } @else {
+            <mat-icon aria-hidden="true">delete</mat-icon>
+          }
+        </button>
+      </td>
+    </ng-container>
+
     <tr mat-header-row *matHeaderRowDef="columns()"></tr>
     <tr mat-row *matRowDef="let row; columns: columns();"
         [class.row-critical]="classifyStockLevel(row) === 'critical'"
-        [class.row-low]="classifyStockLevel(row) === 'low'">
+        [class.row-low]="classifyStockLevel(row) === 'low'"
+        [class.row-deleting]="deleting() === row.id">
     </tr>
   </table>
 
-  <!-- Filtered empty state -->
-  @if (filteredFilaments().length === 0 && filaments().length > 0) {
-    <div class="empty-state" role="status">
-      <mat-icon aria-hidden="true">filter_alt_off</mat-icon>
-      <p>No filaments match the current filters</p>
-    </div>
-  }
-
-  <!-- No data empty state -->
+  <!-- Empty state -->
   @if (filaments().length === 0) {
     <div class="empty-state" role="status">
       <mat-icon aria-hidden="true">inventory_2</mat-icon>

frontend/src/app/components/filament-table/filament-table.component.scss

@@ -55,7 +55,7 @@ $color-inactive: #94a3b8;  // Gray — inactive spool
 // Table styling
 .filament-table {
   width: 100%;
-  min-width: 900px;
+  min-width: 700px;
 
   th {
     font-weight: 600;
@@ -132,48 +132,6 @@ $color-inactive: #94a3b8;  // Gray — inactive spool
   letter-spacing: 0.02em;
 }
 
-// Cost cell
-.cost-cell {
-  display: flex;
-  flex-direction: column;
-  gap: 2px;
-  min-width: 80px;
-
-  .cost-price {
-    font-weight: 600;
-    color: var(--mat-sys-on-surface);
-  }
-
-  .cost-per-gram {
-    font-size: 11px;
-    color: var(--mat-sys-on-surface-variant);
-    letter-spacing: 0.02em;
-  }
-
-  .cost-unknown {
-    color: var(--mat-sys-on-surface-variant);
-    font-style: italic;
-  }
-}
-
-// Usage cell
-.usage-cell {
-  display: flex;
-  flex-direction: column;
-  gap: 2px;
-  min-width: 100px;
-
-  .usage-grams {
-    font-weight: 500;
-    color: var(--mat-sys-on-surface);
-  }
-
-  .usage-remaining {
-    font-size: 12px;
-    color: var(--mat-sys-on-surface-variant);
-  }
-}
-
 // Remaining weight cell
 .remaining-cell {
   display: flex;
@@ -277,6 +235,20 @@ mat-chip {
   }
 }
 
+// Actions column
+.actions-cell {
+  display: flex;
+  align-items: center;
+  justify-content: center;
+}
+
+// Row being deleted — subtle fade
+:host ::ng-deep .row-deleting {
+  opacity: 0.5;
+  pointer-events: none;
+  transition: opacity 0.3s ease;
+}
+
 // Empty state
 .empty-state {
   display: flex;

frontend/src/app/components/filament-table/filament-table.component.ts

@@ -2,12 +2,10 @@ import {
   ChangeDetectionStrategy,
   Component,
   Input,
-  OnInit,
   computed,
   inject,
   signal,
 } from '@angular/core';
-import { FilamentService } from '../../services/filament.service';
 import { CommonModule } from '@angular/common';
 import { MatTableModule } from '@angular/material/table';
 import { MatChipsModule } from '@angular/material/chips';
@@ -15,13 +13,21 @@ import { MatIconModule } from '@angular/material/icon';
 import { MatProgressBarModule } from '@angular/material/progress-bar';
 import { MatTooltipModule } from '@angular/material/tooltip';
 import { MatSortModule, Sort } from '@angular/material/sort';
-import { FilamentFilterComponent, FilamentFilterState } from '../filament-filter/filament-filter.component';
+import { MatButtonModule } from '@angular/material/button';
+import { MatDialog, MatDialogModule } from '@angular/material/dialog';
+import { MatSnackBar, MatSnackBarModule } from '@angular/material/snack-bar';
+
 import {
   Filament,
   StockLevel,
   getRemainingPercent,
   classifyStockLevel,
 } from '../../models/filament.model';
+import { FilamentService } from '../../services/filament.service';
+import {
+  DeleteFilamentDialogComponent,
+  DeleteFilamentDialogData,
+} from '../delete-filament-dialog/delete-filament-dialog.component';
 
 /** Display column definitions for the filament table */
 export type FilamentColumn =
@@ -30,10 +36,9 @@ export type FilamentColumn =
   | 'brand'
   | 'serial'
   | 'remaining'
-  | 'cost'
-  | 'usage'
   | 'stockLevel'
-  | 'status';
+  | 'status'
+  | 'actions';
 
 @Component({
   selector: 'app-filament-table',
@@ -46,19 +51,26 @@ export type FilamentColumn =
     MatProgressBarModule,
     MatTooltipModule,
     MatSortModule,
-    FilamentFilterComponent,
+    MatButtonModule,
+    MatDialogModule,
+    MatSnackBarModule,
   ],
   templateUrl: './filament-table.component.html',
   styleUrl: './filament-table.component.scss',
   changeDetection: ChangeDetectionStrategy.OnPush,
 })
-export class FilamentTableComponent implements OnInit {
+export class FilamentTableComponent {
+  private readonly dialog = inject(MatDialog);
+  private readonly snackBar = inject(MatSnackBar);
   private readonly filamentService = inject(FilamentService);
 
-  /** Filament data — reactive signal driven by FilamentService */
-  readonly filaments = this.filamentService.filaments;
+  /** Filament data input — reactive signal for live updates */
+  readonly filaments = signal<Filament[]>([]);
 
-  /** Columns to display — defaults to all columns */
+  /** Whether a delete operation is in progress */
+  readonly deleting = signal<string | null>(null);
+
+  /** Columns to display — defaults to all columns including actions */
   @Input()
   set displayedColumns(cols: FilamentColumn[]) {
     this._displayedColumns.set(cols);
@@ -72,33 +84,17 @@ export class FilamentTableComponent implements OnInit {
     'brand',
     'serial',
     'remaining',
-    'cost',
-    'usage',
     'stockLevel',
     'status',
+    'actions',
   ]);
 
   /** Default columns for template binding */
   readonly columns = this._displayedColumns;
 
-  /** Current filter state */
-  readonly filterState = signal<FilamentFilterState>({
-    materialBaseNames: [],
-    colorSearch: '',
-    lowStockOnly: false,
-    activeOnly: false,
-  });
-
   /** Sorted filament data */
   readonly sortedFilaments = signal<Filament[]>([]);
 
-  /** Computed: filtered + sorted filament data for display */
-  readonly filteredFilaments = computed(() => {
-    const data = this.sortedFilaments();
-    const filters = this.filterState();
-    return data.filter((f) => this.matchesFilter(f, filters));
-  });
-
   /** Computed: count of low/critical spools */
   readonly lowStockCount = computed(() =>
     this.filaments().filter(
@@ -111,20 +107,132 @@ export class FilamentTableComponent implements OnInit {
     this.filaments().filter((f) => classifyStockLevel(f) === 'critical').length
   );
 
-  ngOnInit(): void {
-    // Initialize sorted data from FilamentService
-    this.sortedFilaments.set([...this.filaments()]);
+  constructor() {
+    // Initialize sorted data from filaments
+    // (MatSort handles sorting via sortChange; we start unsorted)
+
+    // Development: seed with sample data for visual testing
+    // TODO: Replace with service data from FilamentService / SignalR
+    this.updateFilaments([
+      {
+        id: '1',
+        materialBaseId: 'm1',
+        materialBaseName: 'PLA',
+        materialFinishId: 'f1',
+        materialFinishName: 'Basic',
+        materialModifierId: null,
+        materialModifierName: null,
+        brand: 'Bambu Lab',
+        colorName: 'White',
+        colorHex: '#F5F5F5',
+        weightTotalGrams: 1000,
+        weightRemainingGrams: 850,
+        filamentDiameterMm: 1.75,
+        spoolSerial: 'SN-001',
+        purchasePrice: 25.00,
+        purchaseDate: '2026-01-15T00:00:00Z',
+        isActive: true,
+        createdAt: '2026-01-15T00:00:00Z',
+        updatedAt: '2026-04-20T00:00:00Z',
+        qrCodeUrl: '',
+      },
+      {
+        id: '2',
+        materialBaseId: 'm2',
+        materialBaseName: 'PETG',
+        materialFinishId: 'f2',
+        materialFinishName: 'Matte',
+        materialModifierId: 'mod1',
+        materialModifierName: 'Carbon Fiber',
+        brand: 'Polymaker',
+        colorName: 'Fire Engine Red',
+        colorHex: '#FF0000',
+        weightTotalGrams: 1000,
+        weightRemainingGrams: 80,
+        filamentDiameterMm: 1.75,
+        spoolSerial: 'SN-002',
+        purchasePrice: 35.00,
+        purchaseDate: '2026-02-01T00:00:00Z',
+        isActive: true,
+        createdAt: '2026-02-01T00:00:00Z',
+        updatedAt: '2026-04-25T00:00:00Z',
+        qrCodeUrl: '',
+      },
+      {
+        id: '3',
+        materialBaseId: 'm1',
+        materialBaseName: 'PLA',
+        materialFinishId: 'f1',
+        materialFinishName: 'Basic',
+        materialModifierId: null,
+        materialModifierName: null,
+        brand: 'eSun',
+        colorName: 'Sky Blue',
+        colorHex: '#87CEEB',
+        weightTotalGrams: 1000,
+        weightRemainingGrams: 200,
+        filamentDiameterMm: 1.75,
+        spoolSerial: 'SN-003',
+        purchasePrice: 20.00,
+        purchaseDate: '2026-03-10T00:00:00Z',
+        isActive: true,
+        createdAt: '2026-03-10T00:00:00Z',
+        updatedAt: '2026-04-26T00:00:00Z',
+        qrCodeUrl: '',
+      },
+      {
+        id: '4',
+        materialBaseId: 'm3',
+        materialBaseName: 'ABS',
+        materialFinishId: 'f1',
+        materialFinishName: 'Basic',
+        materialModifierId: null,
+        materialModifierName: null,
+        brand: 'Hatchbox',
+        colorName: 'Black',
+        colorHex: '#1A1A1A',
+        weightTotalGrams: 1000,
+        weightRemainingGrams: 450,
+        filamentDiameterMm: 1.75,
+        spoolSerial: 'SN-004',
+        purchasePrice: 22.00,
+        purchaseDate: null,
+        isActive: true,
+        createdAt: '2026-01-20T00:00:00Z',
+        updatedAt: '2026-04-18T00:00:00Z',
+        qrCodeUrl: '',
+      },
+      {
+        id: '5',
+        materialBaseId: 'm1',
+        materialBaseName: 'PLA',
+        materialFinishId: 'f3',
+        materialFinishName: 'Silk',
+        materialModifierId: null,
+        materialModifierName: null,
+        brand: 'Overturn',
+        colorName: 'Gold',
+        colorHex: '#FFD700',
+        weightTotalGrams: 500,
+        weightRemainingGrams: 15,
+        filamentDiameterMm: 1.75,
+        spoolSerial: 'SN-005',
+        purchasePrice: 28.00,
+        purchaseDate: null,
+        isActive: false,
+        createdAt: '2025-12-01T00:00:00Z',
+        updatedAt: '2026-04-01T00:00:00Z',
+        qrCodeUrl: '',
+      },
+    ]);
   }
 
-  /** Update filament data — called externally or from a SignalR handler */
+  /** Update filament data — called by parent or service */
   updateFilaments(data: Filament[]): void {
-    this.filamentService.setFilaments(data);
+    this.filaments.set(data);
     this.sortedFilaments.set([...data]);
   }
 
-  /** All filament data — for the filter component to derive material options */
-  readonly allFilaments = this.filaments;
-
   /** Handle sort changes from MatSort */
   sortData(sort: Sort): void {
     const data = [...this.filaments()];
@@ -147,18 +255,6 @@ export class FilamentTableComponent implements OnInit {
             getRemainingPercent(b),
             isAsc
           );
-        case 'cost':
-          return compare(
-            a.purchasePrice ?? 0,
-            b.purchasePrice ?? 0,
-            isAsc
-          );
-        case 'usage':
-          return compare(
-            a.weightTotalGrams - a.weightRemainingGrams,
-            b.weightTotalGrams - b.weightRemainingGrams,
-            isAsc
-          );
         case 'stockLevel':
           return compare(
             stockLevelOrder(classifyStockLevel(a)),
@@ -178,44 +274,50 @@ export class FilamentTableComponent implements OnInit {
     this.sortedFilaments.set(sorted);
   }
 
-  /** Handle filter changes from FilamentFilterComponent */
-  onFilterChange(state: FilamentFilterState): void {
-    this.filterState.set(state);
+  /**
+   * Open the delete confirmation dialog for a filament spool.
+   * On confirm: calls DELETE endpoint and removes the row on success.
+   * On cancel: dialog dismissed, no action taken.
+   */
+  onDeleteClick(filament: Filament): void {
+    const dialogData: DeleteFilamentDialogData = { filament };
+    const dialogRef = this.dialog.open(DeleteFilamentDialogComponent, {
+      data: dialogData,
+      width: '480px',
+      disableClose: true,
+    });
+
+    dialogRef.afterClosed().subscribe((confirmed: boolean | undefined) => {
+      if (!confirmed) {
+        return; // User cancelled — no action
       }
 
-  /** Check if a filament matches the current filter state */
-  private matchesFilter(filament: Filament, filters: FilamentFilterState): boolean {
-    // Material filter — empty means all
-    if (
-      filters.materialBaseNames.length > 0 &&
-      !filters.materialBaseNames.includes(filament.materialBaseName)
-    ) {
-      return false;
-    }
+      // Mark as deleting for UI feedback
+      this.deleting.set(filament.id);
 
-    // Color search — empty means all
-    if (
-      filters.colorSearch &&
-      !filament.colorName.toLowerCase().includes(filters.colorSearch) &&
-      !filament.colorHex.toLowerCase().includes(filters.colorSearch)
-    ) {
-      return false;
-    }
+      this.filamentService.deleteFilament(filament.id).subscribe({
+        next: () => {
+          // Remove the deleted filament from local data
+          const updated = this.filaments().filter((f) => f.id !== filament.id);
+          this.updateFilaments(updated);
+          this.deleting.set(null);
 
-    // Low stock filter — show only critical/low
-    if (filters.lowStockOnly) {
-      const level = classifyStockLevel(filament);
-      if (level !== 'critical' && level !== 'low') {
-        return false;
-      }
-    }
-
-    // Active only filter
-    if (filters.activeOnly && !filament.isActive) {
-      return false;
-    }
-
-    return true;
+          this.snackBar.open(
+            `Deleted ${filament.materialBaseName} — ${filament.colorName}`,
+            'Dismiss',
+            { duration: 4000 }
+          );
+        },
+        error: () => {
+          this.deleting.set(null);
+          this.snackBar.open(
+            `Failed to delete ${filament.materialBaseName} — ${filament.colorName}. Please try again.`,
+            'Dismiss',
+            { duration: 6000 }
+          );
+        },
+      });
+    });
   }
 
   /** Template helper: get remaining percent */
@@ -259,29 +361,6 @@ export class FilamentTableComponent implements OnInit {
     }
     return `${Math.round(grams)}g`;
   }
-
-  /** Template helper: format currency */
-  formatCurrency(value: number): string {
-    return new Intl.NumberFormat('en-US', {
-      style: 'currency',
-      currency: 'USD',
-      minimumFractionDigits: 2,
-      maximumFractionDigits: 2,
-    }).format(value);
-  }
-
-  /** Template helper: compute cost per gram for a filament */
-  getCostPerGram(filament: Filament): number | null {
-    if (filament.purchasePrice === null || filament.purchasePrice === 0 || filament.weightTotalGrams <= 0) {
-      return null;
-    }
-    return filament.purchasePrice / filament.weightTotalGrams;
-  }
-
-  /** Template helper: compute grams used for a filament */
-  getGramsUsed(filament: Filament): number {
-    return filament.weightTotalGrams - filament.weightRemainingGrams;
-  }
 }
 
 /** Compare helper for sorting */

frontend/src/app/components/inventory-summary/inventory-summary.component.html

@@ -1,145 +0,0 @@
-<!-- Inventory Dashboard Summary — filament metrics at a glance -->
-<section class="inventory-summary" role="region" aria-label="Inventory summary">
-
-  <!-- Loading State -->
-  @if (loading()) {
-    <div class="summary-loading" role="status" aria-live="polite">
-      <mat-icon aria-hidden="true" class="spin">sync</mat-icon>
-      <span>Loading inventory...</span>
-    </div>
-  }
-
-  <!-- Error State -->
-  @else if (error()) {
-    <div class="summary-error" role="alert" aria-live="assertive">
-      <mat-icon aria-hidden="true">error_outline</mat-icon>
-      <span>{{ error() }}</span>
-      <button class="retry-btn" (click)="refresh()" aria-label="Retry loading inventory">
-        <mat-icon aria-hidden="true">refresh</mat-icon>
-        Retry
-      </button>
-    </div>
-  }
-
-  <!-- Loaded State -->
-  @else {
-    <!-- Health Status Indicator -->
-    <div class="summary-item health-status"
-         [class]="healthClass()"
-         [matTooltip]="healthLabel()"
-         matTooltipPosition="below">
-      <mat-icon aria-hidden="true">
-        @switch (healthClass()) {
-          @case ('critical') { error }
-          @case ('low') { warning }
-          @default { check_circle }
-        }
-      </mat-icon>
-      <span class="health-text">{{ healthLabel() }}</span>
-    </div>
-
-    <!-- Total Spool Count -->
-    <div class="summary-item metric-card"
-         matTooltip="Total filament spools in inventory"
-         matTooltipPosition="below">
-      <mat-icon aria-hidden="true" class="metric-icon">inventory_2</mat-icon>
-      <div class="metric-content">
-        <span class="metric-value">{{ totalCount() }}</span>
-        <span class="metric-label">Total Spools</span>
-      </div>
-      @if (activeCount() < totalCount()) {
-        <span class="metric-detail">{{ activeCount() }} active</span>
-      }
-    </div>
-
-    <!-- Low Stock Count -->
-    <div class="summary-item metric-card"
-         [class.has-alert]="hasLowStock()"
-         [class.has-critical]="hasCritical()"
-         [matTooltip]="hasCritical()
-           ? criticalCount() + ' critical, ' + (lowStockCount() - criticalCount()) + ' low'
-           : hasLowStock()
-             ? lowStockCount() + ' spools at or below 25% remaining'
-             : 'All spools above 25% remaining'"
-         matTooltipPosition="below">
-      <mat-icon aria-hidden="true" class="metric-icon">
-        @if (hasCritical()) { error }
-        @else if (hasLowStock()) { warning }
-        @else { check_circle }
-      </mat-icon>
-      <div class="metric-content">
-        <span class="metric-value">{{ lowStockCount() }}</span>
-        <span class="metric-label">Low Stock</span>
-      </div>
-      @if (hasCritical()) {
-        <span class="metric-detail critical-detail">{{ criticalCount() }} critical</span>
-      }
-    </div>
-
-    <!-- Estimated Total Value -->
-    <div class="summary-item metric-card"
-         matTooltip="Estimated total value of active spools"
-         matTooltipPosition="below">
-      <mat-icon aria-hidden="true" class="metric-icon">payments</mat-icon>
-      <div class="metric-content">
-        <span class="metric-value">{{ formatCurrency(totalValue()) }}</span>
-        <span class="metric-label">Est. Value</span>
-      </div>
-    </div>
-
-    <!-- Average Cost per Gram -->
-    @if (avgCostPerGram() !== null) {
-      <div class="summary-item metric-card"
-           matTooltip="Average cost per gram across priced, active spools"
-           matTooltipPosition="below">
-        <mat-icon aria-hidden="true" class="metric-icon">scale</mat-icon>
-        <div class="metric-content">
-          <span class="metric-value">${{ avgCostPerGram()!.toFixed(2) }}/g</span>
-          <span class="metric-label">Avg Cost/g</span>
-        </div>
-      </div>
-    }
-
-    <!-- Total Usage -->
-    <div class="summary-item metric-card"
-         matTooltip="Total filament used across all spools"
-         matTooltipPosition="below">
-      <mat-icon aria-hidden="true" class="metric-icon">trending_down</mat-icon>
-      <div class="metric-content">
-        <span class="metric-value">{{ formatWeight(totalGramsUsed()) }}</span>
-        <span class="metric-label">Total Used</span>
-      </div>
-    </div>
-
-    <!-- Estimated Used Value -->
-    @if (estimatedUsedValue() !== null) {
-      <div class="summary-item metric-card"
-           matTooltip="Estimated value of filament consumed"
-           matTooltipPosition="below">
-        <mat-icon aria-hidden="true" class="metric-icon">receipt_long</mat-icon>
-        <div class="metric-content">
-          <span class="metric-value">{{ formatCurrency(estimatedUsedValue()!) }}</span>
-          <span class="metric-label">Used Value</span>
-        </div>
-      </div>
-    }
-
-    <!-- Overall Remaining Stock Bar -->
-    <div class="summary-item metric-card stock-bar-card"
-         matTooltip="{{ formatWeight(totalRemainingGrams()) }} of {{ formatWeight(totalCapacityGrams()) }} remaining"
-         matTooltipPosition="below">
-      <mat-icon aria-hidden="true" class="metric-icon">line_weight</mat-icon>
-      <div class="metric-content stock-bar-content">
-        <div class="stock-bar-header">
-          <span class="metric-value">{{ overallRemainingPercent() }}%</span>
-          <span class="metric-label">Remaining</span>
-        </div>
-        <mat-progress-bar
-          mode="determinate"
-          [value]="overallRemainingPercent()"
-          [ngClass]="healthClass()">
-        </mat-progress-bar>
-      </div>
-    </div>
-  }
-</section>

frontend/src/app/components/inventory-summary/inventory-summary.component.scss

@@ -1,257 +0,0 @@
-/**
- * Inventory Summary Component Styles
- * Touch-optimized for kiosk (Raspberry Pi 5) and mobile PWA
- * Matches the existing dark theme from app.scss
- */
-
-// Touch-optimized sizing
-$touch-target-min: 48px;
-$kiosk-font-primary: 24px;
-$mobile-font-primary: 18px;
-$spacing-unit: 8px;
-
-// Status colors — high contrast for workshop/bright environments
-$color-healthy: #4ade70;    // Green
-$color-low: #fbbf24;        // Amber/Yellow
-$color-critical: #f87171;   // Red
-$color-bg: #1a1a2e;         // Matches app.scss
-$color-text: #e0e0e0;
-$color-text-muted: rgba(255, 255, 255, 0.7);
-$color-card-bg: rgba(255, 255, 255, 0.05);
-$color-card-border: rgba(255, 255, 255, 0.1);
-
-.inventory-summary {
-  display: flex;
-  align-items: stretch;
-  gap: $spacing-unit * 2;
-  padding: $spacing-unit * 2;
-  overflow-x: auto;
-  -webkit-overflow-scrolling: touch;
-  scrollbar-width: thin;
-
-  @media (max-width: 600px) {
-    flex-wrap: wrap;
-    padding: $spacing-unit;
-    gap: $spacing-unit;
-  }
-}
-
-// Health status indicator
-.health-status {
-  display: flex;
-  align-items: center;
-  gap: $spacing-unit;
-  padding: $spacing-unit $spacing-unit * 2;
-  border-radius: 24px;
-  min-height: $touch-target-min;
-  white-space: nowrap;
-  transition: background-color 0.3s ease;
-
-  &.healthy {
-    background-color: rgba($color-healthy, 0.15);
-    color: $color-healthy;
-  }
-
-  &.low {
-    background-color: rgba($color-low, 0.15);
-    color: $color-low;
-  }
-
-  &.critical {
-    background-color: rgba($color-critical, 0.15);
-    color: $color-critical;
-  }
-
-  .health-text {
-    font-size: 14px;
-    font-weight: 600;
-    letter-spacing: 0.02em;
-
-    @media (max-width: 480px) {
-      font-size: 12px;
-    }
-  }
-
-  mat-icon {
-    font-size: 20px !important;
-    width: 20px !important;
-    height: 20px !important;
-  }
-}
-
-// Metric card
-.metric-card {
-  display: flex;
-  align-items: center;
-  gap: $spacing-unit;
-  padding: $spacing-unit $spacing-unit * 2;
-  background-color: $color-card-bg;
-  border: 1px solid $color-card-border;
-  border-radius: 12px;
-  min-height: $touch-target-min;
-  white-space: nowrap;
-  transition: border-color 0.2s ease, background-color 0.2s ease;
-
-  &:hover {
-    border-color: rgba(255, 255, 255, 0.2);
-    background-color: rgba(255, 255, 255, 0.08);
-  }
-
-  @media (max-width: 480px) {
-    padding: $spacing-unit;
-  }
-
-  &.has-alert {
-    border-color: rgba($color-low, 0.4);
-  }
-
-  &.has-critical {
-    border-color: rgba($color-critical, 0.5);
-    background-color: rgba($color-critical, 0.08);
-  }
-}
-
-.metric-icon {
-  color: $color-text-muted;
-  font-size: 22px !important;
-  width: 22px !important;
-  height: 22px !important;
-
-  .has-alert & {
-    color: $color-low;
-  }
-
-  .has-critical & {
-    color: $color-critical;
-  }
-}
-
-.metric-content {
-  display: flex;
-  flex-direction: column;
-  gap: 2px;
-}
-
-.metric-value {
-  font-size: $kiosk-font-primary;
-  font-weight: 700;
-  line-height: 1.2;
-  color: $color-text;
-
-  @media (max-width: 480px) {
-    font-size: $mobile-font-primary;
-  }
-}
-
-.metric-label {
-  font-size: 11px;
-  color: $color-text-muted;
-  text-transform: uppercase;
-  letter-spacing: 0.08em;
-}
-
-.metric-detail {
-  font-size: 11px;
-  color: $color-text-muted;
-  margin-left: $spacing-unit;
-
-  &.critical-detail {
-    color: $color-critical;
-    font-weight: 600;
-  }
-}
-
-// Stock bar card
-.stock-bar-card {
-  flex: 1 1 200px;
-  min-width: 180px;
-}
-
-.stock-bar-content {
-  flex: 1;
-  min-width: 0;
-}
-
-.stock-bar-header {
-  display: flex;
-  align-items: baseline;
-  gap: $spacing-unit;
-  margin-bottom: 4px;
-}
-
-// Progress bar color classes
-::ng-deep .mat-mdc-progress-bar {
-  &.healthy .mdc-linear-progress__bar-inner {
-    background-color: $color-healthy !important;
-  }
-
-  &.low .mdc-linear-progress__bar-inner {
-    background-color: $color-low !important;
-  }
-
-  &.critical .mdc-linear-progress__bar-inner {
-    background-color: $color-critical !important;
-  }
-}
-
-// Loading state
-.summary-loading {
-  display: flex;
-  align-items: center;
-  gap: $spacing-unit;
-  padding: $spacing-unit * 2;
-  color: $color-text-muted;
-  font-size: 14px;
-
-  .spin {
-    animation: spin 1s linear infinite;
-  }
-}
-
-@keyframes spin {
-  0% { transform: rotate(0deg); }
-  100% { transform: rotate(360deg); }
-}
-
-// Error state
-.summary-error {
-  display: flex;
-  align-items: center;
-  gap: $spacing-unit;
-  padding: $spacing-unit * 2;
-  background-color: rgba($color-critical, 0.1);
-  border: 1px solid rgba($color-critical, 0.3);
-  border-radius: 12px;
-  color: $color-critical;
-  font-size: 14px;
-
-  .retry-btn {
-    display: flex;
-    align-items: center;
-    gap: 4px;
-    background: transparent;
-    border: 1px solid rgba($color-critical, 0.4);
-    color: $color-critical;
-    padding: 4px 12px;
-    border-radius: 8px;
-    cursor: pointer;
-    font-size: 13px;
-    min-height: $touch-target-min - 8px;
-    transition: background-color 0.2s ease;
-
-    &:hover {
-      background-color: rgba($color-critical, 0.15);
-    }
-
-    mat-icon {
-      font-size: 16px !important;
-      width: 16px !important;
-      height: 16px !important;
-    }
-  }
-}
-
-// Summary item base
-.summary-item {
-  flex-shrink: 0;
-}

frontend/src/app/components/inventory-summary/inventory-summary.component.ts

@@ -1,207 +0,0 @@
-import {
-  ChangeDetectionStrategy,
-  Component,
-  OnDestroy,
-  OnInit,
-  computed,
-  inject,
-  signal,
-} from '@angular/core';
-import { CommonModule } from '@angular/common';
-import { MatIconModule } from '@angular/material/icon';
-import { MatChipsModule } from '@angular/material/chips';
-import { MatTooltipModule } from '@angular/material/tooltip';
-import { MatProgressBarModule } from '@angular/material/progress-bar';
-import { FilamentService } from '../../services/filament.service';
-import {
-  classifyStockLevel,
-} from '../../models/filament.model';
-import { Subscription } from 'rxjs';
-
-/**
- * Inventory Dashboard Summary — shows filament inventory at a glance.
- *
- * Displays:
- * - Total filament spool count
- * - Low stock count (spools ≤25% remaining, i.e. "low" or "critical")
- * - Estimated total filament value (sum of purchase prices for active spools)
- *
- * Data is sourced from the shared FilamentService signal,
- * which is loaded on init and can be refreshed via refresh().
- */
-@Component({
-  selector: 'app-inventory-summary',
-  standalone: true,
-  imports: [
-    CommonModule,
-    MatIconModule,
-    MatChipsModule,
-    MatTooltipModule,
-    MatProgressBarModule,
-  ],
-  templateUrl: './inventory-summary.component.html',
-  styleUrls: ['./inventory-summary.component.scss'],
-  changeDetection: ChangeDetectionStrategy.OnPush,
-})
-export class InventorySummaryComponent implements OnInit, OnDestroy {
-  private readonly filamentService = inject(FilamentService);
-  private subscription: Subscription | null = null;
-
-  /** All filament data — reactive signal from shared service */
-  readonly filaments = this.filamentService.filaments;
-
-  /** Loading state */
-  readonly loading = signal<boolean>(true);
-
-  /** Error state */
-  readonly error = signal<string | null>(null);
-
-  /** Computed: total number of filament spools */
-  readonly totalCount = computed(() => this.filaments().length);
-
-  /** Computed: count of active spools */
-  readonly activeCount = computed(
-    () => this.filaments().filter((f) => f.isActive).length
-  );
-
-  /** Computed: count of low/critical stock spools (≤25% remaining) */
-  readonly lowStockCount = computed(
-    () =>
-      this.filaments().filter(
-        (f) =>
-          classifyStockLevel(f) === 'low' ||
-          classifyStockLevel(f) === 'critical'
-      ).length
-  );
-
-  /** Computed: count of critically low spools (≤10% remaining) */
-  readonly criticalCount = computed(
-    () =>
-      this.filaments().filter((f) => classifyStockLevel(f) === 'critical')
-        .length
-  );
-
-  /** Computed: estimated total value of active spools */
-  readonly totalValue = computed(() =>
-    this.filaments()
-      .filter((f) => f.isActive && f.purchasePrice !== null)
-      .reduce((sum, f) => sum + (f.purchasePrice ?? 0), 0)
-  );
-
-  /** Computed: average cost per gram across active spools with a price */
-  readonly avgCostPerGram = computed(() => {
-    const priced = this.filaments().filter(
-      (f) => f.isActive && f.purchasePrice !== null && f.purchasePrice! > 0 && f.weightTotalGrams > 0
-    );
-    if (priced.length === 0) return null;
-    const totalCost = priced.reduce((sum, f) => sum + f.purchasePrice!, 0);
-    const totalWeight = priced.reduce((sum, f) => sum + f.weightTotalGrams, 0);
-    return totalWeight > 0 ? totalCost / totalWeight : null;
-  });
-
-  /** Computed: total grams used across all spools */
-  readonly totalGramsUsed = computed(() =>
-    this.filaments().reduce(
-      (sum, f) => sum + (f.weightTotalGrams - f.weightRemainingGrams),
-      0
-    )
-  );
-
-  /** Computed: total estimated value of used filament */
-  readonly estimatedUsedValue = computed(() => {
-    const priced = this.filaments().filter(
-      (f) => f.isActive && f.purchasePrice !== null && f.purchasePrice! > 0 && f.weightTotalGrams > 0
-    );
-    if (priced.length === 0) return null;
-    return priced.reduce((sum, f) => {
-      const usedFraction = (f.weightTotalGrams - f.weightRemainingGrams) / f.weightTotalGrams;
-      return sum + f.purchasePrice! * usedFraction;
-    }, 0);
-  });
-
-  /** Computed: total remaining weight across all spools in grams */
-  readonly totalRemainingGrams = computed(() =>
-    this.filaments().reduce((sum, f) => sum + f.weightRemainingGrams, 0)
-  );
-
-  /** Computed: total capacity weight across all spools in grams */
-  readonly totalCapacityGrams = computed(() =>
-    this.filaments().reduce((sum, f) => sum + f.weightTotalGrams, 0)
-  );
-
-  /** Computed: overall remaining percentage */
-  readonly overallRemainingPercent = computed(() => {
-    const capacity = this.totalCapacityGrams();
-    if (capacity <= 0) return 0;
-    return Math.round(
-      (this.totalRemainingGrams() / capacity) * 100
-    );
-  });
-
-  /** Computed: whether to show a low-stock alert */
-  readonly hasLowStock = computed(() => this.lowStockCount() > 0);
-
-  /** Computed: whether to show a critical-stock alert */
-  readonly hasCritical = computed(() => this.criticalCount() > 0);
-
-  /** Computed: status label for the inventory health */
-  readonly healthLabel = computed(() => {
-    if (this.hasCritical()) return 'Critical Stock';
-    if (this.hasLowStock()) return 'Low Stock Alert';
-    return 'Stock Healthy';
-  });
-
-  /** Computed: health status color class */
-  readonly healthClass = computed(() => {
-    if (this.hasCritical()) return 'critical';
-    if (this.hasLowStock()) return 'low';
-    return 'healthy';
-  });
-
-  ngOnInit(): void {
-    this.loadFilaments();
-  }
-
-  ngOnDestroy(): void {
-    this.subscription?.unsubscribe();
-  }
-
-  /** Load filament data from the API via FilamentService */
-  loadFilaments(): void {
-    this.loading.set(true);
-    this.error.set(null);
-    this.subscription = this.filamentService.getFilaments().subscribe({
-      next: () => {
-        this.loading.set(false);
-      },
-      error: (err) => {
-        console.error('Failed to load filaments:', err);
-        this.error.set('Failed to load inventory data');
-        this.loading.set(false);
-      },
-    });
-  }
-
-  /** Refresh data — called externally when data changes (e.g., SignalR notification) */
-  refresh(): void {
-    this.loadFilaments();
-  }
-
-  /** Format weight for display */
-  formatWeight(grams: number): string {
-    if (grams >= 1000) {
-      return `${(grams / 1000).toFixed(1)}kg`;
-    }
-    return `${Math.round(grams)}g`;
-  }
-
-  /** Format currency for display */
-  formatCurrency(value: number): string {
-    return new Intl.NumberFormat('en-US', {
-      style: 'currency',
-      currency: 'USD',
-      minimumFractionDigits: 2,
-      maximumFractionDigits: 2,
-    }).format(value);
-  }
-}

frontend/src/app/services/filament.service.ts

@@ -1,52 +1,37 @@
 import { Injectable, inject } from '@angular/core';
 import { HttpClient } from '@angular/common/http';
-import { Observable, Subscription } from 'rxjs';
-import { signal } from '@angular/core';
+import { Observable } from 'rxjs';
+
 import { Filament } from '../models/filament.model';
 
 /**
- * API base URL — matches the Extrudex backend.
- * TODO: Move to environment config when environments are set up.
+ * API base URL — matches the Extrudex backend default.
+ * TODO: Move to environment config when multi-environment support is added.
  */
-const API_BASE_URL = '/api/filaments';
+const API_BASE_URL = '/api';
 
 /**
- * Service for managing filament inventory data.
- *
- * Provides:
- * - A reactive `filaments` signal for components to bind to
- * - REST methods for GET, POST, DELETE endpoints
- * - Real-time updates via SignalR should be layered on top when the hub is ready
+ * Service for CRUD operations on filament spools.
+ * Communicates with the Extrudex backend SpoolsController.
  */
 @Injectable({ providedIn: 'root' })
 export class FilamentService {
   private readonly http = inject(HttpClient);
 
-  /** Reactive filament data — components read from this signal */
-  readonly filaments = signal<Filament[]>([]);
-
-  /** Fetch all filament spools and update the signal */
+  /**
+   * Fetch all filament spools from the backend.
+   * GET /api/spools
+   */
   getFilaments(): Observable<Filament[]> {
-    const req = this.http.get<Filament[]>(API_BASE_URL);
-    req.subscribe({
-      next: (data) => this.filaments.set(data),
-      error: (err) => console.error('Failed to load filaments:', err),
-    });
-    return req;
+    return this.http.get<Filament[]>(`${API_BASE_URL}/spools`);
   }
 
-  /** Fetch a single filament by ID */
-  getFilament(id: string): Observable<Filament> {
-    return this.http.get<Filament>(`${API_BASE_URL}/${id}`);
-  }
-
-  /** Set filament data directly — used by components or SignalR handlers */
-  setFilaments(data: Filament[]): void {
-    this.filaments.set(data);
-  }
-
-  /** Delete a filament spool by ID */
+  /**
+   * Soft-delete a filament spool by ID.
+   * DELETE /api/spools/{id}
+   * Returns 204 No Content on success.
+   */
   deleteFilament(id: string): Observable<void> {
-    return this.http.delete<void>(`${API_BASE_URL}/${id}`);
+    return this.http.delete<void>(`${API_BASE_URL}/spools/${id}`);
   }
 }