fix(led): preserve strip corners and feather the complete light field

Keep real end and corner emitters, robust decimal joins and wall-circle
sweep events. Render one positive-winding compound visibility clip so
Chromium cannot cancel or cut away overlapping light regions.

Add independent pixel oracles for glow falloff and wall-following tubes.
Replace the lossy fan-count limit with explicit cached-path bounds while
retaining the original timing and warm-cycle heap-growth limits.

Issue: #788
User-Visible: yes

scripts/bundle-budget.mjs

@@ -675,7 +675,10 @@ export const LAZY_ONBOARDING_GZIP_CEILING = 28_395;
  * its English dictionary + shared geometry 9 913 B), plus 10 %, rounded up to
  * a KiB. Absolute walls: a View without strips loads neither graph.
  */
-export const LAZY_LED_GZIP_CEILING = 10 * 1024;
+// #788: retaining real end/corner emitters, stable numerical miters and exact
+// wall/radius events raises the lazy View graph to 10 353 B gzip. Give this
+// corrected representation 11 KiB; no-LED initial View is still untouched.
+export const LAZY_LED_GZIP_CEILING = 11 * 1024;
 export const LAZY_LED_EDITOR_GZIP_CEILING = 11 * 1024;
 
 /**

scripts/mutation-registry.mjs

@@ -14296,6 +14296,46 @@ const MUTANT_DEFINITIONS = [
       replace: "    const shift = [0, 0];",
     }],
   },
+  {
+    id: 'led-field-endpoint-dropped',
+    guard: 'node demo/smoke_led_strip_field.mjs',
+    because: '#788: both true ends must fade to zero, including a short residual segment in either direction',
+    patches: [{
+      file: 'src/led-strip-field.ts',
+      find: '  const emitters = emitterSamples(path, input.faces, r / 4);',
+      replace: '  const emitters = emitterSamples(path, input.faces, r / 4).slice(0, -1);',
+    }],
+  },
+  {
+    id: 'led-field-disc-cancels-fan',
+    guard: 'node demo/smoke_led_strip_field.mjs',
+    because: '#788: positive-winding discs and blocked fans form an OR union, never subtract visible floor',
+    patches: [{
+      file: 'src/led-strip-field.ts',
+      find: '0 1 1 ${right} ${cy} A${r} ${r} 0 1 1 ${left}',
+      replace: '0 1 0 ${right} ${cy} A${r} ${r} 0 1 0 ${left}',
+    }],
+  },
+  {
+    id: 'led-field-compound-clip-children',
+    guard: 'node demo/smoke_led_strip_field.mjs',
+    because: '#788: Chromium rasterizes several compound clip children with direction-dependent bright holes',
+    patches: [{
+      file: 'src/led-strip-field.ts',
+      find: '<path d="${geometry.pieces.map((piece) => piece.clip).join(\' \')}" clip-rule="nonzero"></path>',
+      replace: '${geometry.pieces.map((piece) => svg`<path d="${piece.clip}" clip-rule="nonzero"></path>`)}',
+    }],
+  },
+  {
+    id: 'led-field-circle-events-missing',
+    guard: 'node demo/smoke_led_strip_field.mjs',
+    because: '#788: a long wall meeting the emitter radius must not replace visible floor with a coarse sweep chord',
+    patches: [{
+      file: 'src/led-strip-field.ts',
+      find: '    const near = circleSegments(p, radius, scene.occluders);',
+      replace: '    const near = scene.occluders;',
+    }],
+  },
   {
     id: 'led-emits-from-body',
     guard: 'npx tsc -p tsconfig.test.json && node scripts/fix-test-build.mjs '

scripts/smoke-links.mjs

@@ -608,7 +608,8 @@ export const SMOKE_LINKS = [
       'src/led-strip-gate.ts', 'src/led-strip-card.ts', 'src/led-strip-geometry.ts',
       'src/led-strip-runtime.ts', 'src/led-strip-field.ts', 'src/led-strip-editor.ts',
     ],
-    smokes: ['smoke_led_strip_draw.mjs', 'smoke_led_strip_bind.mjs', 'smoke_led_strip_glow.mjs'],
+    smokes: ['smoke_led_strip_draw.mjs', 'smoke_led_strip_bind.mjs', 'smoke_led_strip_glow.mjs',
+      'smoke_led_strip_field.mjs', 'smoke_led_strip_tube.mjs'],
     because: '#780: drawing, placement against walls, binding, the icon ↔ strip switch, the LED '
       + 'history, the View target, the field states and the static card are observed only as '
       + 'rendered strips and saved configs; no smoke names the lazy modules’ functions',