fix: require space release before send during voice recording

Holding space was triggering start→send in rapid succession. Now tracks
whether space is held and requires release before allowing send action.

Author: ammar-agent

src/browser/components/ChatInput/index.tsx

@@ -497,16 +497,22 @@ export const ChatInput: React.FC<ChatInputProps> = (props) => {
     };
 
     // Global keybinds only active during recording
+    // Track if space is held to prevent start→send on hold
+    let spaceHeld = true; // Assume held since recording just started via space
+    const handleKeyUp = (e: KeyboardEvent) => {
+      if (e.key === " ") spaceHeld = false;
+    };
     const handleKeyDown = (e: KeyboardEvent) => {
       if (voiceInput.state !== "recording") return;
-      if (e.key === " ") {
+      if (e.key === " " && !spaceHeld) {
         e.preventDefault();
         voiceInput.stop({ send: true });
       } else if (e.key === "Escape") {
         e.preventDefault();
         voiceInput.cancel();
       }
     };
+    window.addEventListener("keyup", handleKeyUp);
 
     window.addEventListener(CUSTOM_EVENTS.TOGGLE_VOICE_INPUT, handleToggle as EventListener);
     window.addEventListener("keydown", handleKeyDown);
@@ -862,9 +868,10 @@ export const ChatInput: React.FC<ChatInputProps> = (props) => {
       return;
     }
 
-    // Space on empty input starts voice recording
+    // Space on empty input starts voice recording (ignore key repeat from holding)
     if (
       e.key === " " &&
+      !e.repeat &&
       input.trim() === "" &&
       voiceInput.shouldShowUI &&
       voiceInput.isApiKeySet &&