Merge pull request 'fix: enable Hermes voice STT dependencies' (#21) from fix/hermes-voice-stt-deps into master

Reviewed-on: #21

hosts/m3-hermes/services/hermes-agent.nix

@@ -61,13 +61,14 @@ in {
     addToSystemPackages = true;
     # v0.14 lazy-installs heavy optional backends by default. In the sealed
     # Nix package, include the backends this host config actively uses so the
-    # gateway, Matrix bridge, memory, web search, and TTS work
+    # gateway, Matrix bridge, memory, web search, TTS, and local STT work
     # without runtime pip/uv mutation.
     extraDependencyGroups = [
       "matrix"
       "honcho"
       "exa"
       "edge-tts"
+      "voice"
     ];
 
     extraPackages = with pkgs; [