Add module logger + surface silent exceptions in 7 logger-less files — 12 sites

These files had silent `except Exception: pass` blocks but no module
logger. Added `import logging` + `logger = logging.getLogger(__name__)`
at the top of each, then replaced the silent excepts with
`logger.debug(...)`.

- core/replaygain.py — 4 sites (id3 txxx + vorbis + mp4 atom reads)
- core/wishlist/presence.py — 3 sites (wishlist row parsing + queries)
- core/runtime_state.py — 1 site (activity toast emit)
- core/automation/signals.py — 1 site (collect known signals)
- core/download_engine/rate_limit.py — 1 site (plugin rate_limit_policy)
- api/system.py — 1 site (hydrabase status probe)
- api/search.py — 1 site (hydrabase search)

Refs #369

api/search.py

@@ -2,10 +2,14 @@
 Search endpoints — search external sources (Spotify, iTunes, Hydrabase).
 """
 
+import logging
+
 from flask import request, current_app
 from .auth import require_api_key
 from .helpers import api_success, api_error
 
+logger = logging.getLogger(__name__)
+
 
 def register_routes(bp):
 
@@ -38,8 +42,8 @@ def register_routes(bp):
                         if hydra_results:
                             tracks = [_serialize_track(t) for t in hydra_results]
                             return api_success({"tracks": tracks, "source": "hydrabase"})
-                except Exception:
-                    pass
+                except Exception as e:
+                    logger.debug("hydrabase search failed: %s", e)
 
             spotify = ctx.get("spotify_client")
             from core.metadata_service import get_primary_source, get_primary_client

api/system.py

@@ -2,12 +2,15 @@
 System endpoints — status, activity feed, stats.
 """
 
+import logging
 import time
 
 from flask import current_app
 from .auth import require_api_key
 from .helpers import api_success, api_error
 
+logger = logging.getLogger(__name__)
+
 
 def register_routes(bp):
 
@@ -35,8 +38,8 @@ def register_routes(bp):
                 try:
                     ws, _ = hydrabase.get_ws_and_lock()
                     hydrabase_ok = ws is not None and ws.connected
-                except Exception:
-                    pass
+                except Exception as e:
+                    logger.debug("hydrabase status probe failed: %s", e)
 
             return api_success({
                 "uptime": f"{hours}h {minutes}m {seconds}s",

core/automation/signals.py

@@ -8,6 +8,9 @@ names from the saved automation set so the builder UI can autocomplete.
 from __future__ import annotations
 
 import json
+import logging
+
+logger = logging.getLogger(__name__)
 
 
 def collect_known_signals(database) -> list[str]:
@@ -38,6 +41,6 @@ def collect_known_signals(database) -> list[str]:
                             signals.add(sig)
             except (json.JSONDecodeError, TypeError):
                 pass
-    except Exception:
-        pass
+    except Exception as e:
+        logger.debug("collect known signals failed: %s", e)
     return sorted(signals)

core/download_engine/rate_limit.py

@@ -22,8 +22,11 @@ module-level constant in the client file.
 
 from __future__ import annotations
 
+import logging
 from dataclasses import dataclass
 
+logger = logging.getLogger(__name__)
+
 
 @dataclass(frozen=True)
 class RateLimitPolicy:
@@ -63,8 +66,8 @@ def resolve_policy(plugin) -> RateLimitPolicy:
             policy = method()
             if isinstance(policy, RateLimitPolicy):
                 return policy
-        except Exception:
-            pass
+        except Exception as e:
+            logger.debug("plugin rate_limit_policy() call failed: %s", e)
 
     declared = getattr(plugin, 'RATE_LIMIT_POLICY', None)
     if isinstance(declared, RateLimitPolicy):

core/replaygain.py

@@ -7,10 +7,13 @@ Tag writing uses mutagen directly to stay consistent with the rest of the codeba
 Supported formats: MP3, FLAC, OGG Vorbis, Opus, M4A/MP4
 """
 
+import logging
 import re
 import subprocess
 from typing import Optional, Tuple, Dict
 
+logger = logging.getLogger(__name__)
+
 # ReplayGain 2.0 reference level (EBU R128)
 RG_REFERENCE_LUFS = -18.0
 
@@ -189,8 +192,8 @@ def read_replaygain_tags(file_path: str) -> Dict[str, Optional[str]]:
             result['track_peak'] = _mp4_rg(audio, _TAG_TRACK_PEAK)
             result['album_gain'] = _mp4_rg(audio, _TAG_ALBUM_GAIN)
             result['album_peak'] = _mp4_rg(audio, _TAG_ALBUM_PEAK)
-    except Exception:
-        pass
+    except Exception as e:
+        logger.debug("read replaygain tags failed: %s", e)
 
     return result
 
@@ -207,8 +210,8 @@ def _read_id3_txxx(audio, description: str) -> Optional[str]:
             if frame_key.upper() == key.upper():
                 frame = audio.tags[frame_key]
                 return str(frame.text[0]) if frame.text else None
-    except Exception:
-        pass
+    except Exception as e:
+        logger.debug("read id3 txxx frame failed: %s", e)
     return None
 
 
@@ -218,8 +221,8 @@ def _vorbis_first(audio, key: str) -> Optional[str]:
         vals = audio.get(key) or audio.get(key.upper())
         if vals:
             return str(vals[0])
-    except Exception:
-        pass
+    except Exception as e:
+        logger.debug("read vorbis comment failed: %s", e)
     return None
 
 
@@ -234,8 +237,8 @@ def _mp4_rg(audio, tag_name: str) -> Optional[str]:
                 if hasattr(val, 'decode'):
                     return val.decode('utf-8')
                 return str(val)
-    except Exception:
-        pass
+    except Exception as e:
+        logger.debug("read mp4 replaygain atom failed: %s", e)
     return None
 
 

core/runtime_state.py

@@ -2,11 +2,14 @@
 
 from __future__ import annotations
 
+import logging
 import threading
 import time
 from functools import wraps
 from typing import Any, Dict, Optional
 
+logger = logging.getLogger(__name__)
+
 matched_context_lock = threading.Lock()
 matched_downloads_context: Dict[str, Dict[str, Any]] = {}
 tasks_lock = threading.Lock()
@@ -57,8 +60,8 @@ def add_activity_item(icon, title, subtitle, time_ago="Now", show_toast=True):
     if show_toast and _activity_toast_emitter is not None:
         try:
             _activity_toast_emitter("dashboard:toast", activity_item)
-        except Exception:
-            pass
+        except Exception as e:
+            logger.debug("emit activity toast failed: %s", e)
 
     return activity_item
 

core/wishlist/presence.py

@@ -3,6 +3,9 @@
 from __future__ import annotations
 
 import json
+import logging
+
+logger = logging.getLogger(__name__)
 
 
 def load_wishlist_keys(cursor, profile_id: int) -> set[str]:
@@ -27,21 +30,21 @@ def load_wishlist_keys(cursor, profile_id: int) -> set[str]:
                     wa = ""
                 if wname:
                     keys.add(wname + "|||" + wa.lower().strip())
-            except Exception:
-                pass
+            except Exception as e:
+                logger.debug("parse wishlist row failed: %s", e)
 
     try:
         cursor.execute("SELECT spotify_data FROM wishlist_tracks WHERE profile_id = ?", (profile_id,))
         _absorb(cursor.fetchall())
         return keys
-    except Exception:
-        pass
+    except Exception as e:
+        logger.debug("profile-aware wishlist query failed: %s", e)
 
     try:
         cursor.execute("SELECT spotify_data FROM wishlist_tracks")
         _absorb(cursor.fetchall())
-    except Exception:
-        pass
+    except Exception as e:
+        logger.debug("legacy wishlist query failed: %s", e)
     return keys