v1.10.4: booterm mobile UX — copy/paste, swipe-close, send-to-chat, search

- Long-press selection + floating menu (mobile + desktop right-click): Copy,
  Paste, Select All, Search, Send to chat. Tap-outside / Esc dismiss.
- Pane-header Paste button (📋) for iOS user-gesture clipboard read.
- Swipe-left-to-close on mobile pane pill with red "Close" overlay and
  translateX visual hint; spring-back below 80px threshold.
- Send-to-chat reverse path: chatInputsRegistry + sendToChat event mirror
  the existing terminalsRegistry pattern. ChatInput appends with newline
  separator on receive and focuses (no auto-send).
- Scrollback search via xterm-addon-search@^0.13.0: SearchBar overlay with
  N-of-M match counter (onDidChangeResults), Enter/Shift-Enter cycling.
- Cmd/Ctrl+F intercept in Session.tsx when active pane is terminal; xterm
  also intercepts when focused. Browser native find passes through elsewhere.
- terminalsRegistry signature extended with openSearch + paste callbacks.

Includes deferred CLAUDE.md updates documenting v1.10/v1.10.1/v1.10.2/v1.10.3
learnings (uid 1000 collision, libc match, two event buses, vite proxy order,
mobile pane URL sync, xterm canvas selection).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

apps/web/src/pages/Session.tsx

@@ -251,6 +251,18 @@ function SessionInner({ sessionId }: { sessionId: string }) {
         return;
       }
 
+      // v1.10.4: Cmd/Ctrl + F — when the active pane is a terminal, open the
+      // scrollback search bar. When it isn't, fall through to the browser's
+      // native find (no preventDefault, no early return).
+      if (key === 'f' && !e.shiftKey) {
+        const activePane = panes[activePaneIdx];
+        if (activePane?.kind === 'terminal') {
+          e.preventDefault();
+          terminalsRegistry.get(activePane.id)?.openSearch();
+        }
+        return;
+      }
+
       // Cmd/Ctrl + Tab / Shift+Tab — cycle through panes.
       if (key === 'tab') {
         if (panes.length <= 1) return;