eeschema copy/paste fix: wx UTF-8 text dataobj (c1f1477) + regression specs

Cmd+C/Cmd+V in the wasm eeschema pasted a stray "(" SCH_TEXT — the stroke
font renders it as a small blue arc — instead of the copied symbol, and any
copy reached navigator.clipboard as a single character. Root cause and fix
live in wxwidgets (90bbad29822: UTF-8 wxDF_UNICODETEXT + the port's missing
GetAllFormats key function; c1f14775ba3: empty-read cache fallback + no
browser pre-clear on copy). This bump carries them plus the guards:

- tests/kicad/eeschema-copy-paste.spec.ts: chromium asserts the full
  multi-form (lib_symbols …)(symbol …) blob reaches navigator.clipboard;
  both engines assert copy → paste → save yields a second symbol and no
  stray (text …) item (firefox exercises the m_textCache fallback path).
  The kicad-chromium project now grants clipboard-read/write. NB the kicad
  projects' device UAs claim Windows, so specs must send plain Control+…
  — ControlOrMeta resolves to Meta on a mac host, which the "Windows" app
  ignores, and the bare key fires eeschema hotkeys instead.
- tests/e2e/textdataobj.spec.ts + Makefile.wasm target `textdataobj`:
  drives the wx-repo harness app (wxwidgets/tests/wasm/textdataobj_test.cpp)
  and asserts the SUITE-DONE failure counters plus the full-string browser
  round-trip, sentinel-seeded so a failed write cannot read as stale success.
- tests/e2e/clipboard.spec.ts: the Copy test now asserts the full input
  text reaches the clipboard (previously truncated to "S").

Verified locally: all specs red on the old wx, green after; wx-chromium
320/320, kicad-chromium 121/121 (collab specs env-gated).

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

tests/playwright.config.ts

@@ -192,6 +192,9 @@ export default defineConfig({
       use: {
         ...devices['Desktop Chrome'],
         viewport: { width: 1280, height: 720 },
+        // eeschema-copy-paste asserts the copied s-expression reaches
+        // navigator.clipboard in full (firefox cannot grant these).
+        permissions: ['clipboard-read', 'clipboard-write'],
         ...CHROMIUM_CI_ARGS,
       },
     },