refactor(web): limit composer realtime events to typing and voice

docs/core-checklist-status.md

@@ -21,7 +21,7 @@ Legend:
 12. Pinning - `DONE` (message/chat pin-unpin)
 13. Reactions - `DONE`
 14. Delivery Status - `DONE` (sent/delivered/read + reconnect reconciliation after backend restarts)
-15. Typing Realtime - `DONE` (typing start/stop + recording voice start/stop + recording video start/stop in circle-video send flow)
+15. Typing Realtime - `DONE` (web: typing start/stop + recording voice start/stop; `recording_video_*` remains for mobile circle-video clients)
 16. Media & Attachments - `DONE` (upload/preview/download/gallery; sticker/GIF inline media no longer opens photo viewer on click)
 17. Voice Messages - `PARTIAL` (record/send/play/seek + global speed 1x/1.5x/2x; recorder uses improved mime priority for better duration metadata; backend media allowlist includes `audio/mp4`/`audio/x-m4a`; audio store tracks duration via `durationchange/seekable` fallback; websocket send/recorder stop race on fast chat switch is guarded; UX still being polished)
 18. Circle Video Messages - `PARTIAL` (mobile-priority only: backend type/realtime supported; web composer intentionally does not send circles)

web/src/components/MessageComposer.tsx

@@ -343,8 +343,6 @@ export function MessageComposer() {
       | "typing_stop"
       | "recording_voice_start"
       | "recording_voice_stop"
-      | "recording_video_start"
-      | "recording_video_stop"
   ) {
     if (!activeChatId) {
       return;