feat(transcription): add shared voice input support (#4232)

* feat(webui): add voice transcription input

* feat(webui): render ANSI output in code blocks

* refactor(webui): isolate voice recorder logic

* refactor(transcription): keep websocket ingress thin

* refactor(transcription): resolve channel audio settings on demand

* style(webui): neutralize voice waveform color

* feat(webui): add voice input tooltip

* feat(webui): add voice input keyboard shortcut

* fix(webui): distinguish voice shortcut platforms

* fix(webui): place voice button after model selector

* refactor(webui): share voice hold recording helpers

* fix(desktop): allow microphone voice input

* fix(webui): stabilize token usage month labels

* feat(webui): show voice input on settings overview

* fix(webui): label voice capability as recognition

* fix(webui): align capability overview status

* refactor(webui): isolate transcription socket handling

* fix(webui): soften silent voice waveform

* refactor(audio): clarify transcription service location

* docs(transcription): clarify audio and provider boundaries

* fix(exec): reduce session output polling flake

webui/src/hooks/useNanobotStream.ts

@@ -438,6 +438,7 @@ export function useNanobotStream(
   /** Latest sustained goal for this ``chatId`` (``goal_state`` WS events). */
   goalState: GoalStateWsPayload | undefined;
   send: (content: string, images?: SendImage[], options?: SendOptions) => void;
+  transcribeAudio: (dataUrl: string, options?: { durationMs?: number }) => Promise<string>;
   stop: () => void;
   setMessages: React.Dispatch<React.SetStateAction<UIMessage[]>>;
   /** Latest transport-level fault raised since the last ``dismissStreamError``.
@@ -1089,12 +1090,19 @@ export function useNanobotStream(
     client.sendMessage(chatId, "/stop");
   }, [chatId, clearActivitySegment, client, flushPendingStreamEvents]);
 
+  const transcribeAudio = useCallback(
+    (dataUrl: string, options?: { durationMs?: number }) =>
+      client.transcribeAudio(dataUrl, options),
+    [client],
+  );
+
   return {
     messages,
     isStreaming,
     runStartedAt,
     goalState,
     send,
+    transcribeAudio,
     stop,
     setMessages,
     streamError,