refactor: collapse dual-mode plumbing — the DOM port is the only WASM build

The canvas (wxUniversal) mode is gone (wxwidgets submodule); remove every
piece of side-by-side plumbing so there is exactly one build and one test
flow:

- scripts/build-wxuniversal-wasm.sh -> scripts/build-wx-wasm.sh; no
  --dom/--enable-universal; builds into build-wasm/wxwidgets
- build-wasm-test.sh: no DOM_BUILD / apps-dom rsync mirror / PORT=dom;
  apps build straight into tests/apps (Makefile.wasm PORT conditionals
  collapsed; wx.js + wx-dom.js always pre-js)
- docker/build.sh, build-kicad-target.sh, env.sh: WX_PORT / -dom /
  -universal suffixes removed; kicad builds to kicad-<app>, outputs to
  output/; wx.js/wx-dom.js copied from the real source path
  (/workspace/wxwidgets/build/wasm — the old build-wasm path never
  existed and silently failed)
- setup-kicad-wasm.sh: single target dir; the perl wx-dom.js injection is
  gone — the 7 checked-in kicad pages now reference wx-dom.js directly
- playwright configs serve apps/; fixtures drop the test-results/dom and
  logs/wxwidgets/dom namespacing; boot.spec asserts wxDomPort
  unconditionally; pcbnew.spec uses one reference image;
  appearance.spec assertions unconditional
- compare/update-baseline-screenshots.sh: --port removed
- tests/gal-regression/wasm/Makefile: links build-wasm/wxwidgets and
  carries wx-dom.js as a second pre-js — the gal-webgl suite (30 specs)
  now actually builds and runs here (it needed host-side boost+glm via
  scripts/deps; the bundle had been missing, timing the whole spec out)
- tests: clickCanvas() dispatches via page.mouse (DOM widgets
  legitimately cover the canvas; locator actionability refused the
  click); the comprehensive spec drives wxChoice through its native
  <select> (browser-owned popup cannot be coordinate-clicked)
- docs: README/CLAUDE.md/build.md script names and dirs;
  features/wx-dom-port README reframed (DOM is THE port), visual-notes
  bugs 26-28; FindwxWidgets.cmake config label drops 'wasmuniv'
- wxwidgets submodule -> 9dbacc9448 (DOM-only port, fork diff shrunk)

Gate: full wx e2e suite 292 passed / 1 skipped / 0 failed — first run
ever with the gal-webgl specs green (28 scenarios + load + sequential).

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

tests/scripts/setup-kicad-wasm.sh

@@ -11,17 +11,8 @@ set -e
 SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
 PROJECT_ROOT="$(cd "$SCRIPT_DIR/../.." && pwd)"
 
-# WX_PORT=dom serves the DOM-flavor bundles (built by docker/build.sh with
-# WX_PORT=dom into output-dom/) from tests/apps-dom/kicad.
-if [ "${WX_PORT:-}" = "dom" ]; then
-    KICAD_TEST="$PROJECT_ROOT/tests/apps-dom/kicad"
-    OUTPUT_DIR="$PROJECT_ROOT/output/dom"
-    KICAD_BUILD_SUFFIX="-dom"
-else
-    KICAD_TEST="$PROJECT_ROOT/tests/apps/kicad"
-    OUTPUT_DIR="$PROJECT_ROOT/output"
-    KICAD_BUILD_SUFFIX=""
-fi
+KICAD_TEST="$PROJECT_ROOT/tests/apps/kicad"
+OUTPUT_DIR="$PROJECT_ROOT/output"
 
 mkdir -p "$KICAD_TEST"
 
@@ -72,15 +63,15 @@ copy_app() {
 
     echo "Output ${app} not found locally, trying Docker volume..."
     if docker compose -f "$PROJECT_ROOT/docker/docker-compose.yml" cp \
-         kicad-wasm-builder:/workspace/build-wasm/kicad-${app}${KICAD_BUILD_SUFFIX}/${subdir}/${app}.js "$KICAD_TEST/" 2>/dev/null \
+         kicad-wasm-builder:/workspace/build-wasm/kicad-${app}/${subdir}/${app}.js "$KICAD_TEST/" 2>/dev/null \
        && docker compose -f "$PROJECT_ROOT/docker/docker-compose.yml" cp \
-         kicad-wasm-builder:/workspace/build-wasm/kicad-${app}${KICAD_BUILD_SUFFIX}/${subdir}/${app}.wasm "$KICAD_TEST/" 2>/dev/null; then
+         kicad-wasm-builder:/workspace/build-wasm/kicad-${app}/${subdir}/${app}.wasm "$KICAD_TEST/" 2>/dev/null; then
         docker compose -f "$PROJECT_ROOT/docker/docker-compose.yml" cp \
-            kicad-wasm-builder:/workspace/build-wasm/kicad-${app}${KICAD_BUILD_SUFFIX}/${subdir}/${app}.wasm.map "$KICAD_TEST/" 2>/dev/null || true
+            kicad-wasm-builder:/workspace/build-wasm/kicad-${app}/${subdir}/${app}.wasm.map "$KICAD_TEST/" 2>/dev/null || true
         docker compose -f "$PROJECT_ROOT/docker/docker-compose.yml" cp \
-            kicad-wasm-builder:/workspace/build-wasm/kicad-${app}${KICAD_BUILD_SUFFIX}/${subdir}/${app}.worker.js "$KICAD_TEST/" 2>/dev/null || true
+            kicad-wasm-builder:/workspace/build-wasm/kicad-${app}/${subdir}/${app}.worker.js "$KICAD_TEST/" 2>/dev/null || true
         docker compose -f "$PROJECT_ROOT/docker/docker-compose.yml" cp \
-            kicad-wasm-builder:/workspace/build-wasm/kicad-${app}${KICAD_BUILD_SUFFIX}/resources/images.tar.gz "$KICAD_TEST/" 2>/dev/null || true
+            kicad-wasm-builder:/workspace/build-wasm/kicad-${app}/resources/images.tar.gz "$KICAD_TEST/" 2>/dev/null || true
         return 0
     fi
 
@@ -107,33 +98,19 @@ if [ -f "$OUTPUT_DIR/wx.js" ]; then
     smart_cp "$OUTPUT_DIR/wx.js" "$KICAD_TEST"
 else
     if docker compose -f "$PROJECT_ROOT/docker/docker-compose.yml" cp \
-      kicad-wasm-builder:/workspace/build-wasm/wxwidgets/build/wasm/wx.js "$KICAD_TEST/" 2>/dev/null; then
+      kicad-wasm-builder:/workspace/wxwidgets/build/wasm/wx.js "$KICAD_TEST/" 2>/dev/null; then
         :
     else
         smart_cp "$PROJECT_ROOT/wxwidgets/build/wasm/wx.js" "$KICAD_TEST"
     fi
 fi
 
-if [ "${WX_PORT:-}" = "dom" ]; then
-    # DOM port: the control-layer shim loads after wx.js.
-    if [ -f "$OUTPUT_DIR/wx-dom.js" ]; then
-        smart_cp "$OUTPUT_DIR/wx-dom.js" "$KICAD_TEST"
-    else
-        smart_cp "$PROJECT_ROOT/wxwidgets/build/wasm/wx-dom.js" "$KICAD_TEST"
-    fi
-
-    # The checked-in kicad pages load wx.js via a <script> tag; the DOM
-    # flavor needs wx-dom.js right after it. Sync the pages and inject the
-    # tag (idempotent).
-    for page in "$PROJECT_ROOT"/tests/apps/kicad/*.html; do
-        [ -f "$page" ] || continue
-        dest="$KICAD_TEST/$(basename "$page")"
-        cp "$page" "$dest"
-        if ! grep -q 'wx-dom.js' "$dest"; then
-            perl -i -pe 's{(<script src="wx.js"></script>)}{$1\n    <script src="wx-dom.js"></script>}' "$dest"
-        fi
-    done
-    echo "  + kicad pages with wx-dom.js injected"
+# The control-layer shim loads after wx.js (the checked-in kicad pages
+# reference both via <script> tags).
+if [ -f "$OUTPUT_DIR/wx-dom.js" ]; then
+    smart_cp "$OUTPUT_DIR/wx-dom.js" "$KICAD_TEST"
+else
+    smart_cp "$PROJECT_ROOT/wxwidgets/build/wasm/wx-dom.js" "$KICAD_TEST"
 fi
 
 echo "KiCad WASM files synced to $KICAD_TEST"