refactor(logging): route frontend console calls through the logger

TRACES: | DR-204

484 ungated `console.*` calls across 63 non-test frontend files shipped to
end users with no way to turn them off. Mechanical substitution, no control
flow, error handling or message semantics changed:

  console.log / console.debug -> log.debug
  console.info                -> log.info
  console.warn                -> log.warn
  console.error               -> log.error

Hand-written `"[Scope] …"` prefixes are dropped where the logger's scope
now carries them; scope names that already existed are preserved verbatim
(`[Auth]`, `[VideoPlayer]`, `[PiP]`, …) and inferred from the filename
where a file had none. `src/routes/player/[id]/+page.svelte` keeps its
`NextEpisode` and `AutoPlay` sub-scopes as separate loggers rather than
flattening them into the page scope.

`grep -rn 'console\.' src/` now matches nothing outside the tests and the
facade itself.

src/routes/library/[id]/+page.svelte

@@ -43,6 +43,9 @@
     initialExpandedSeasons,
     type SeasonData,
   } from "$lib/components/library/seriesNavigation";
+  import { createLogger } from "$lib/utils/logger";
+
+  const log = createLogger("LibraryDetail");
 
   let item = $state<MediaItem | null>(null);
   let loading = $state(true);
@@ -136,11 +139,11 @@
         }
         // Series-less episode: rendered by the Focus View below, series and all.
       }
-      console.log(`[LibraryDetail] ✓ Loaded item: ${item?.name} (${item?.kind})`);
-      console.log(`[LibraryDetail] - Has people? ${item?.people ? `YES (${item.people.length})` : 'NO'}`);
+      log.debug(`✓ Loaded item: ${item?.name} (${item?.kind})`);
+      log.debug(`- Has people? ${item?.people ? `YES (${item.people.length})` : 'NO'}`);
       if (item?.people) {
         item.people.forEach((p, i) => {
-          console.log(`[LibraryDetail]   [${i}] ${p.name} (${p.type})`);
+          log.debug(`  [${i}] ${p.name} (${p.type})`);
         });
       }
 
@@ -154,7 +157,7 @@
         const musicLibrary = $libraries.find(lib => lib.collectionType === "music");
         if (musicLibrary) {
           library.setCurrentLibrary(musicLibrary);
-          console.log("[LibraryDetail] Set current library to music library for music item");
+          log.debug("Set current library to music library for music item");
         }
       }
 
@@ -163,20 +166,20 @@
       // Ensure cast/crew data is loaded for Movies, Series, and Episodes
       // Some APIs/caches may not include people data on first load
       if ((item?.kind === "movie" || item?.kind === "series" || item?.kind === "episode") && (!item.people || item.people.length === 0)) {
-        console.log(`[LibraryDetail] ⚠ People data missing, reloading ${item?.kind}...`);
+        log.debug(`⚠ People data missing, reloading ${item?.kind}...`);
         try {
           const repo = auth.getRepository();
           const fullItem = await repo.getItem(itemId);
-          console.log(`[LibraryDetail] - Reloaded has people? ${fullItem.people ? `YES (${fullItem.people.length})` : 'NO'}`);
+          log.debug(`- Reloaded has people? ${fullItem.people ? `YES (${fullItem.people.length})` : 'NO'}`);
           if (fullItem.people && fullItem.people.length > 0) {
             item = fullItem;
-            console.log(`[LibraryDetail] ✓ Updated item with ${fullItem.people.length} people`);
+            log.debug(`✓ Updated item with ${fullItem.people.length} people`);
             fullItem.people.forEach((p, i) => {
-              console.log(`[LibraryDetail]   [${i}] ${p.name} (${p.type})`);
+              log.debug(`  [${i}] ${p.name} (${p.type})`);
             });
           }
         } catch (e) {
-          console.warn(`Could not reload ${item?.kind} with full cast data:`, e);
+          log.warn(`Could not reload ${item?.kind} with full cast data:`, e);
         }
       }
 
@@ -194,7 +197,7 @@
           repo.getSeriesEpisodes(itemId),
           // Best-effort: a series still renders if the anchor cannot be resolved.
           repo.getSeriesCurrentEpisode(itemId).catch((e) => {
-            console.warn("Could not resolve the current episode:", e);
+            log.warn("Could not resolve the current episode:", e);
             return null;
           }),
         ]);
@@ -220,7 +223,7 @@
             directFetchedEpisode = await repo.getItem(episodeIdParam);
           } catch {
             // Best-effort: the list entry still renders a usable hero.
-            console.warn("Could not fetch focused episode directly:", episodeIdParam);
+            log.warn("Could not fetch focused episode directly:", episodeIdParam);
           }
         }
       }
@@ -322,7 +325,7 @@
           shuffle: false,
         });
       } catch (e) {
-        console.error("Failed to play album:", e);
+        log.error("Failed to play album:", e);
         alert(`Failed to play album: ${e instanceof Error ? e.message : 'Unknown error'}`);
       }
     } else if ($libraryItems.length > 0) {
@@ -346,7 +349,7 @@
           shuffle: true,
         });
       } catch (e) {
-        console.error("Failed to shuffle play album:", e);
+        log.error("Failed to shuffle play album:", e);
         alert(`Failed to shuffle play: ${e instanceof Error ? e.message : 'Unknown error'}`);
       }
     } else if (item?.kind === "series" && allEpisodes.length > 0) {

src/routes/library/favorites/+page.svelte

@@ -29,6 +29,9 @@
     favoritesRouteUrl,
     emptyStateMessage,
   } from "$lib/utils/favoritesView";
+  import { createLogger } from "$lib/utils/logger";
+
+  const log = createLogger("FavoritesPage");
 
   const scope = $derived(resolveFavoritesScope($page.url.searchParams.get("scope")));
 
@@ -49,7 +52,7 @@
       const result = await repo.getFavorites(currentScope, { limit: 500 });
       items = result.items;
     } catch (error) {
-      console.error("Failed to load favorites:", error);
+      log.error("Failed to load favorites:", error);
       loadError = "Could not load your favourites.";
       items = [];
     } finally {