fix: add camera node IPEX antenna hole

hardware/case/camera-node-case-v4.scad

@@ -14,6 +14,8 @@
 // - Boards: ESP32-C3 Super Mini 22.5 x 18 mm, ESP-01S 24.7 x 14.3 x 12 mm.
 // - USB-C bottom power inlet and side USB-A passthrough are panel/breakout placeholders;
 //   measure purchased connector flanges/bodies before production prints.
+// - Left-side IPEX/U.FL antenna pigtail connector/lead hole is a prototype 5.0 mm
+//   circular through-wall clearance; measure the final bulkhead/lead before production.
 
 $fn = 56;
 
@@ -75,6 +77,14 @@ usb_a_cutout_h = 8.0;         // side USB-A female opening, Z height
 usb_a_z = 26.0;               // mid/lower right side, clear of front lid screws/strap bridges
 usb_a_y = 2.0;
 
+// Left-side antenna lead / IPEX-U.FL pigtail connector placeholder.
+// Opposite the right-side USB-A port and cut fully through the left wall into the cavity.
+ipex_hole_d = 5.0;            // prototype circular clearance; measure final pigtail/bulkhead
+ipex_recess_d = 8.5;          // shallow exterior visual/seat recess, not retention geometry
+ipex_recess_depth = 0.9;
+ipex_z = usb_a_z;
+ipex_y = usb_a_y;
+
 // ----- Utility geometry -----
 module rounded_box(size=[10,10,10], r=2, center_xy=true) {
     // Rounded in XY, straight in Z.
@@ -104,6 +114,10 @@ module y_cylinder(d, h, center=true) {
     rotate([90,0,0]) cylinder(d=d, h=h, center=center);
 }
 
+module x_cylinder(d, h, center=true) {
+    rotate([0,90,0]) cylinder(d=d, h=h, center=center);
+}
+
 module screw_boss(x, z) {
     translate([x, -case_d/2 + front_recess_d + boss_len/2, z])
         difference() {
@@ -175,6 +189,14 @@ module camera_node_body_v4() {
                 // Right-side USB-A female passthrough power port for the GoPro.
                 translate([case_w/2 - 0.10, usb_a_y, usb_a_z])
                     yz_rounded_prism(usb_a_cutout_d, wall + 2.8, usb_a_cutout_h, r=0.9);
+
+                // Left-side IPEX/U.FL antenna pigtail connector/lead clearance.
+                // Through-hole intentionally extends past the inner wall so it opens to the cavity.
+                translate([-case_w/2 - 0.10, ipex_y, ipex_z])
+                    x_cylinder(d=ipex_hole_d, h=wall + 3.0);
+                // Shallow exterior circular recess marks/relieves the antenna exit area.
+                translate([-case_w/2 + ipex_recess_depth/2 - 0.05, ipex_y, ipex_z])
+                    x_cylinder(d=ipex_recess_d, h=ipex_recess_depth + 0.2);
             }
 
             // Four protected screw bosses are added after shell hollowing so the
@@ -261,6 +283,7 @@ module camera_node_preview_v4(show_lid=true) {
     color([0,0.2,0.8,0.35]) translate([9, -1, 45]) cube([24.7, 14.3, 12], center=true);
     color([0.1,0.1,0.1,0.35]) translate([0, usb_c_y, 3.8]) cube([16, 9, 5], center=true);
     color([0.1,0.1,0.1,0.35]) translate([case_w/2 - 5.5, usb_a_y, usb_a_z]) cube([11, usb_a_cutout_d + 2, usb_a_cutout_h + 2], center=true);
+    color([0.9,0.7,0.1,0.45]) translate([-case_w/2 - 1.8, ipex_y, ipex_z]) x_cylinder(d=ipex_hole_d, h=8.0);
 }
 
 // Non-print review layout: separates the body and front lid while keeping both