fix: apply ruff auto-fixes and add hk git hooks

- Fix pre-existing lint errors in engine/ modules using ruff --unsafe-fixes
- Add hk.pkl with pre-commit and pre-push hooks using ruff builtin
- Configure hooks to use 'uv run' prefix for tool execution
- Update mise.toml to include hk and pkl tools
- All 73 tests pass

fix: apply ruff auto-fixes and add hk git hooks

- Fix pre-existing lint errors in engine/ modules using ruff --unsafe-fixes
- Add hk.pkl with pre-commit and pre-push hooks using ruff builtin
- Configure hooks to use 'uv run' prefix for tool execution
- Update mise.toml to include hk and pkl tools
- Use 'hk install --mise' for proper mise integration
- All 73 tests pass

engine/ntfy.py

@@ -26,7 +26,7 @@ class NtfyPoller:
         self.topic_url = topic_url
         self.reconnect_delay = reconnect_delay
         self.display_secs = display_secs
-        self._message = None   # (title, body, monotonic_timestamp) or None
+        self._message = None  # (title, body, monotonic_timestamp) or None
         self._lock = threading.Lock()
 
     def start(self):
@@ -55,7 +55,7 @@ class NtfyPoller:
         """Build the stream URL, substituting since= to avoid message replays on reconnect."""
         parsed = urlparse(self.topic_url)
         params = parse_qs(parsed.query, keep_blank_values=True)
-        params['since'] = [last_id if last_id else '20s']
+        params["since"] = [last_id if last_id else "20s"]
         new_query = urlencode({k: v[0] for k, v in params.items()})
         return urlunparse(parsed._replace(query=new_query))
 
@@ -65,7 +65,8 @@ class NtfyPoller:
             try:
                 url = self._build_url(last_id)
                 req = urllib.request.Request(
-                    url, headers={"User-Agent": "mainline/0.1"})
+                    url, headers={"User-Agent": "mainline/0.1"}
+                )
                 # timeout=90 keeps the socket alive through ntfy.sh keepalive heartbeats
                 resp = urllib.request.urlopen(req, timeout=90)
                 while True:
@@ -73,7 +74,7 @@ class NtfyPoller:
                     if not line:
                         break  # server closed connection — reconnect
                     try:
-                        data = json.loads(line.decode('utf-8', errors='replace'))
+                        data = json.loads(line.decode("utf-8", errors="replace"))
                     except json.JSONDecodeError:
                         continue
                     # Advance cursor on every event (message + keepalive) to