feat: Enhance local command handling and introduce local intents

- Refactor `run_local_command` to manage subprocesses more effectively, ensuring child processes are terminated on timeout.
- Introduce `_terminate` function to handle process group termination and capture output.
- Implement `_command_output` to format command results with a character limit.
- Add local intent recognition in `intents.py` to handle commands like "stop", "go to sleep", and "come here" without server interaction.
- Normalize user input to match local intents while stripping filler words.
- Update tests to cover new local intent functionality and ensure proper command handling.
- Enhance speech processing to handle abbreviations and improve spoken output clarity.

.env.example

@@ -72,8 +72,17 @@ ELEVENLABS_VOICE_ID=
 #VAD_MIN_UTTERANCE_SECONDS=0.4
 #VAD_GRACE_SECONDS=4            # how long to wait for you to start talking
 
+# ── Local intents (optional) ────────────────────────────────────────────────
+# A short, closed list of things the pet answers itself, with no server round
+# trip: "stop", "be quiet", "come here", "go away", "go to sleep", "wake up",
+# "say that again", "sit"/"stay", "go for a walk", "use your normal voice".
+# Matched whole and exact, and never while you're answering a question Bolt
+# asked, so a real request ("stop the docker container") still goes to him.
+# Set to false to route absolutely everything through the server.
+#LOCAL_INTENTS=true
+
 # ── Follow-up listening (optional) ──────────────────────────────────────────
-# When a reply ends on a question, the pet keeps listening for your answer
+# When a reply asks you something, the pet keeps listening for your answer
 # instead of dropping back to idle and making you say the wake word again.
 # FOLLOW_UP_MAX_TURNS caps how many question-and-answer rounds can chain
 # without you re-triggering it (0 = no cap) — a stop on runaway loops if the
@@ -181,6 +190,12 @@ ELEVENLABS_VOICE_ID=
 #NOTIFICATION_BRIDGE=false
 #NOTIFICATION_FILTER=build|deploy|calendar
 #NOTIFICATION_MIN_INTERVAL_SECONDS=60
+# Notifications queue while the pet is napping (the heartbeat that forwards them
+# doesn't run). These two stop an overnight backlog becoming a monologue at 8am:
+# the queue drops its oldest past the limit, and anything staler than the age
+# limit is discarded rather than read out.
+#NOTIFICATION_QUEUE_LIMIT=20
+#NOTIFICATION_MAX_AGE_SECONDS=900
 
 # ── Push-to-talk (optional) ─────────────────────────────────────────────────
 # Global hotkey; needs pynput and a session that allows global key hooks