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/components/ChatInput.tsx

@@ -25,6 +25,7 @@ import { AgentPicker } from '@/components/AgentPicker';
 import { SkillSlashCommand } from '@/components/SkillSlashCommand';
 import { api } from '@/api/client';
 import { sessionEvents } from '@/hooks/sessionEvents';
+import { chatInputsRegistry, sendToChat } from '@/lib/events';
 import { useSkills } from '@/hooks/useSkills';
 import { useViewport } from '@/hooks/useViewport';
 
@@ -51,9 +52,16 @@ interface Props {
   // empty). Callers wire this to api.chats.skillInvoke. Omitting the prop
   // disables slash-command dispatch (input is sent as literal text).
   onSlashCommand?: (skillName: string, userMessage: string) => void | Promise<void>;
+  // v1.10.4: send-to-chat reverse path. When chatId is provided, this input
+  // registers in chatInputsRegistry so the terminal floating menu can list
+  // it, and subscribes to sendToChat events scoped to this chatId. Receiving
+  // an event appends the text to the current draft (with a newline separator
+  // when non-empty) and focuses — no auto-send.
+  chatId?: string;
+  chatLabel?: string;
 }
 
-export function ChatInput({ disabled, projectId, agentId, onAgentChange, sessionId, webSearchEnabled, onSend, onForceSend, onSlashCommand }: Props) {
+export function ChatInput({ disabled, projectId, agentId, onAgentChange, sessionId, webSearchEnabled, onSend, onForceSend, onSlashCommand, chatId, chatLabel }: Props) {
   const { isMobile } = useViewport();
   const [value, setValue] = useState('');
   const [busy, setBusy] = useState(false);
@@ -107,6 +115,35 @@ export function ChatInput({ disabled, projectId, agentId, onAgentChange, session
     });
   }, []);
 
+  // v1.10.4: register this input in the chat-input registry so the terminal
+  // pane's "Send to chat" menu can list it. Re-registers when chatLabel
+  // changes (e.g. rename) so the menu reflects the current name.
+  useEffect(() => {
+    if (!chatId) return;
+    return chatInputsRegistry.register(chatId, chatLabel ?? 'Chat', () => {
+      textareaRef.current?.focus();
+    });
+  }, [chatId, chatLabel]);
+
+  // v1.10.4: subscribe to send_to_chat events scoped by chatId. Appends the
+  // payload text to the current draft (with a newline separator if the
+  // draft is non-empty) and focuses the textarea. Does NOT auto-submit.
+  useEffect(() => {
+    if (!chatId) return;
+    return sendToChat.subscribe(({ chat_id, text }) => {
+      if (chat_id !== chatId) return;
+      setValue((prev) => (prev.length === 0 ? text : `${prev}\n${text}`));
+      requestAnimationFrame(() => {
+        const ta = textareaRef.current;
+        if (!ta) return;
+        ta.focus();
+        // Put caret at end so the user can keep typing immediately.
+        const end = ta.value.length;
+        ta.selectionStart = ta.selectionEnd = end;
+      });
+    });
+  }, [chatId]);
+
   function removeAttachment(id: string) {
     setAttachments(prev => prev.filter(a => a.id !== id));
   }