test(e2e): fix wx suite — header deps, port pinning, drop legacy-GL tests, wx+pthread worker fix

Suite went 64 failed → 291 passed / 0 failed:
- Makefile.wasm: compile with -MMD -MP and include .d files — stale objects
  relinked against a newer wx lib crashed apps at startup with "function
  signature mismatch" after any header/vtable change
- playwright(.coroutine).config.ts: pin the server port for the whole run
  (resolvePort from playwright-kicad.config.ts); the 60s freshness window made
  workers restarted after a failure rotate to a dead port (ERR_CONNECTION_REFUSED
  cascade across ~50 tests)
- drop legacy-GL testing: KiCad renders via WebGL GAL (gal-webgl.spec.ts);
  remove minimal_test's OpenGL tab/GLTestCanvas, opengl.spec.ts, GL z-order
  describes, -sLEGACY_GL_EMULATION + gl_immediate_shim.js from the test build,
  and the orphaned GL baselines
- coroutine-pthread repro apps join the `all` target (make clean used to delete
  them while all never rebuilt them); clean no longer eats checked-in JS like
  worker_dom_stub.js
- bump wxwidgets: guard module-eval document access so wx+pthread apps
  (threadpool tests) survive Web Worker eval

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

tests/README.md

@@ -42,7 +42,6 @@ tests/
 │   ├── dialog.spec.ts      # wxDialog/wxMessageBox tests
 │   ├── tree.spec.ts        # wxTreeCtrl tests
 │   ├── grid.spec.ts        # wxGrid/wxSpinCtrl/wxSearchCtrl tests
-│   ├── opengl.spec.ts      # OpenGL tab tests
 │   ├── wxwidgets.spec.ts   # Comprehensive UI interaction tests
 │   └── ...
 ├── logs/                   # Test logs (auto-generated)
@@ -102,13 +101,12 @@ Then open http://localhost:8000/minimal_test.html
 
 | Spec File | Tests | Description |
 |-----------|-------|-------------|
-| `wxwidgets.spec.ts` | Comprehensive | Full UI interaction, stability, OpenGL |
+| `wxwidgets.spec.ts` | Comprehensive | Full UI interaction, stability |
 | `menu.spec.ts` | wxMenuBar | Menu bar visibility and interactions |
 | `timer.spec.ts` | wxTimer | Timer start/stop/reset functionality |
 | `dialog.spec.ts` | wxDialog | Message boxes and custom dialogs |
 | `tree.spec.ts` | wxTreeCtrl | Tree control with expand/collapse |
 | `grid.spec.ts` | wxGrid | Grid, SpinCtrl, SearchCtrl |
-| `opengl.spec.ts` | OpenGL | GL tests (immediate mode, vertex arrays) |
 | `aui.spec.ts` | wxAuiManager | Dockable panels |
 | `clipboard.spec.ts` | wxClipboard | Copy/paste operations |
 | `dataview.spec.ts` | wxDataViewCtrl | List and tree data views (Zone Manager-like) |