comments-ux: figma bubble pins, floating panel, seen/reactions/mentions UI, theme follow (0001 A–E + 0002)

- GAL pin = one closed polygon: round body, squared-off bottom-left corner
  ON the anchor; PIN gains unread (accent ring); tuner knobs; shipped
  defaults r9/ring4/alpha.9. DOM hit/highlight sized+offset from a LIVE
  pin-geometry radius store the tuner feeds.
- Floating comments panel: draggable (shared useDraggablePanel with
  always-onscreen restore; overlay FAB retrofitted), collapsible to header,
  header carries add/show-hide/mark-all; unread badges (rose on mention).
- Reactions (emoji-mart lazy, quick-row) + @-mention autocomplete
  (MentionInput; backend roster with presence/author fallback).
- Theme: ?theme= > storage > OS, no-flash boot, toggles (HomePage + overlay
  View row), boot-seeded pcbjam-dark schematic colors + kicadSetColorTheme /
  kicadSetDarkChrome bridges (canvas + wx chrome live flip), light/dark
  variants across all overlay surfaces.
- e2e: panel/seen/reactions/mentions/theme specs + resize-spec geometry;
  bumps pcbjam-shared (flat-key seen/reactions + listCollaborators) and
  wxwidgets (dark chrome) pointers.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01HLwn1toiNKi1MgxGKnZTes

wasm/bindings/pcbnew_embind.cpp

@@ -53,6 +53,7 @@
 #include "collab_common.h"
 #include "collab_presence_core.h"
 #include "collab_presence_style.h"
+#include "pcbjam_theme.h"
 #include "pcbjam_libs_reload.h"
 #include <algorithm>
 #include <chrono>
@@ -1603,6 +1604,18 @@ void pcbCollabSetStyle( std::string aJson )
     presenceCore().setStyle( aJson );
 }
 
+// JS → C++ (comments-ux 0002 F4): live color-theme switch (see pcbjam_theme.h).
+void pcbSetColorTheme( std::string aTheme )
+{
+    pcbjam_theme::setColorTheme( pcbFrame(), aTheme );
+}
+
+// Pre-main chrome appearance seed (called at onRuntimeInitialized).
+void pcbSetDarkChrome( bool aDark )
+{
+    pcbjam_theme::setDarkChromeFlag( aDark );
+}
+
 // Tuner helper: a VARIED demo-selection set — labeled uuid groups (smallest +
 // largest footprint, the two busiest nets' track segments) so the style
 // preview shows the real range of shapes instead of two overlapping items.
@@ -2351,6 +2364,9 @@ EMSCRIPTEN_BINDINGS(pcbnew) {
     // Follow-user (collab-presence 0008).
     function("kicadCollabFitViewport", &pcbCollabFitViewport);
     function("kicadCollabSetStyle", &pcbCollabSetStyle);
+    // Live color-theme switch (comments-ux 0002 F4).
+    function("kicadSetColorTheme", &pcbSetColorTheme);
+    function("kicadSetDarkChrome", &pcbSetDarkChrome);
     function("kicadCollabTestListItems", &pcbCollabTestListItems);
     function("kicadCollabTestDemoSet", &pcbCollabTestDemoSet);
     function("kicadCollabGetViewport", &pcbCollabGetViewport);