feat: conditionally render voice button based on voice mode state (#8561)

* chore: update webrtcvad dependency and add optional audio support

- Updated webrtcvad version requirement to >=1.9.4 in pyproject.toml and uv.lock.
- Moved webrtcvad to optional dependencies under the new 'audio' category in both pyproject.toml files for better modularity.
- Ensured compatibility with existing dependencies while enhancing documentation for optional audio features.

* fix: handle optional import of voice_mode_router in API initialization

- Updated the API router initialization to conditionally include the voice_mode_router if it is available, improving modularity and preventing import errors.
- Adjusted the import statement for voice_mode_router to handle ImportError gracefully, ensuring the application remains robust in its absence.

* feat: add voice mode flag to API configuration

- Introduced a new function `get_voice_mode_enabled` to check for the availability of the `webrtcvad` library, enhancing the API's capability to support voice mode features.
- Updated the `ConfigResponse` schema to include `voice_mode_enabled` flag, allowing clients to query the status of voice mode support.
- Integrated the voice mode feature flag into the `get_config` endpoint response, improving the configurability of the API.

* test: skip voice mode tests if webrtcvad is not installed

- Added a conditional import for the webrtcvad library in the voice mode test suite.
- Implemented a pytest marker to skip tests when webrtcvad is unavailable, enhancing test robustness and preventing unnecessary failures.

* feat: add voice mode state management to flows manager store

- Introduced `voiceModeEnabled` state and `setVoiceModeEnabled` action in the flows manager store to manage the voice mode feature.
- Updated the `ConfigResponse` interface and `useGetConfig` hook to integrate the new voice mode state, allowing for dynamic configuration updates.
- Enhanced the API's configurability by ensuring the voice mode state is properly set based on the API response.

* feat: conditionally render voice button based on voice mode state

- Integrated `voiceModeEnabled` from the flows manager store to control the visibility of the VoiceButton component.
- The VoiceButton will now return null if voice mode is not enabled, enhancing the user interface by preventing unnecessary rendering.

* fix: ensure boolean conversion for voice mode state in config hook

- Updated the `setVoiceModeEnabled` function in the `useGetConfig` hook to explicitly convert the `voice_mode_enabled` value to a boolean, ensuring consistent handling of the voice mode state based on API responses.

* refactor: conditionally import voice_mode_router in API initialization

- Updated the API router to conditionally include the voice_mode_router based on its availability, enhancing modularity and preventing import errors.
- Adjusted the __init__.py file to dynamically add voice_mode_router to the __all__ list if the import is successful, improving the API's robustness.

* chore: revert mcp version update

* refactor: reorder router initialization and add audio flag to backend install task

* feat: add audio module to backend installation command in VS Code tasks

* ci: add audio extras to uv sync in frontend tests

.github/workflows/typescript_test.yml

@@ -220,12 +220,12 @@ jobs:
 
           echo "Total tests to run: $TEST_COUNT"
 
-          # Calculate optimal shard count - 1 shard per 5 tests, min 1, max 25
+          # Calculate optimal shard count - 1 shard per 5 tests, min 1, max 40
           SHARD_COUNT=$(( (TEST_COUNT + 4) / 5 ))
           if [ $SHARD_COUNT -lt 1 ]; then
             SHARD_COUNT=1
-          elif [ $SHARD_COUNT -gt 25 ]; then
-            SHARD_COUNT=25
+          elif [ $SHARD_COUNT -gt 40 ]; then
+            SHARD_COUNT=40
           fi
 
           # Create the matrix combinations string
@@ -301,7 +301,7 @@ jobs:
           prune-cache: false
 
       - name: Install Python Dependencies
-        run: uv sync
+        run: uv sync --extra audio
 
       - name: Configure Environment Variables
         run: |