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/lib/utils/videoSurface.ts

@@ -23,6 +23,9 @@
  */
 
 import { nativeVideoActive } from "$lib/stores/nativeVideo";
+import { createLogger } from "$lib/utils/logger";
+
+const log = createLogger("videoSurface");
 
 interface AndroidVideoSurfaceBridge {
   setTransparent(transparent: boolean): void;
@@ -50,7 +53,7 @@ export function isNativeSurfaceBridgeAvailable(): boolean {
   try {
     return bridge()?.isSupported() ?? false;
   } catch (err) {
-    console.warn("[videoSurface] isSupported check failed:", err);
+    log.warn("isSupported check failed:", err);
     return false;
   }
 }
@@ -73,17 +76,17 @@ export function enableNativeVideoCompositing(): void {
     // correctly behind a WebView that never stopped painting its own opaque
     // background. That ambiguity is what DR-172 was left holding. MainActivity's
     // console bridge forwards this to logcat under the JellyTauWeb tag.
-    console.error(
-      "[videoSurface] AndroidVideoSurface bridge is MISSING - the webview will " +
+    log.error(
+      "AndroidVideoSurface bridge is MISSING - the webview will " +
         "stay opaque and native video will play as audio with no picture"
     );
     return;
   }
   try {
     androidVideoSurface.setTransparent(true);
-    console.log("[videoSurface] compositing enabled (setTransparent(true) sent)");
+    log.debug("compositing enabled (setTransparent(true) sent)");
   } catch (err) {
-    console.warn("[videoSurface] setTransparent(true) failed:", err);
+    log.warn("setTransparent(true) failed:", err);
     nativeVideoActive.set(false);
   }
 }
@@ -93,7 +96,7 @@ export function disableNativeVideoCompositing(): void {
   try {
     bridge()?.setTransparent(false);
   } catch (err) {
-    console.warn("[videoSurface] setTransparent(false) failed:", err);
+    log.warn("setTransparent(false) failed:", err);
   }
   // Always clear the page layer, even if the bridge call failed, so the app is
   // never left rendering over a transparent window.