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/stores/connectivity.ts

@@ -13,6 +13,9 @@ import { writable, derived } from "svelte/store";
 import { browser } from "$app/environment";
 import { listen } from "@tauri-apps/api/event";
 import { commands } from "$lib/api/bindings";
+import { createLogger } from "$lib/utils/logger";
+
+const log = createLogger("ConnectivityStore");
 
 export interface ConnectivityState {
   /** Browser's navigator.onLine status */
@@ -76,7 +79,7 @@ function createConnectivityStore() {
       update((s) => ({ ...s, isOnline: true }));
       // Device regained network — ask the backend to re-verify the server now.
       checkServerReachable().catch((err) => {
-        console.debug("[ConnectivityStore] Recheck after 'online' failed:", err);
+        log.debug("Recheck after 'online' failed:", err);
       });
     });
 
@@ -85,7 +88,7 @@ function createConnectivityStore() {
       // decide whether the server is actually reachable.
       update((s) => ({ ...s, isOnline: false }));
       checkServerReachable().catch((err) => {
-        console.debug("[ConnectivityStore] Recheck after 'offline' failed:", err);
+        log.debug("Recheck after 'offline' failed:", err);
       });
     });
   }
@@ -132,7 +135,7 @@ function createConnectivityStore() {
 
       return isReachable;
     } catch (error) {
-      console.error("[ConnectivityStore] Failed to check server:", error);
+      log.error("Failed to check server:", error);
       return false;
     }
   }
@@ -145,7 +148,7 @@ function createConnectivityStore() {
     isMonitoring = true;
 
     try {
-      console.log("[ConnectivityStore] Starting monitoring for:", url);
+      log.debug("Starting monitoring for:", url);
 
       // Set the server URL
       await commands.connectivitySetServerUrl(url);
@@ -163,10 +166,10 @@ function createConnectivityStore() {
         isChecking: status.isChecking,
       }));
 
-      console.log("[ConnectivityStore] Started monitoring. Initial status:",
+      log.debug("Started monitoring. Initial status:",
         status.isServerReachable ? "ONLINE" : "OFFLINE");
     } catch (error) {
-      console.error("[ConnectivityStore] Failed to start monitoring:", error);
+      log.error("Failed to start monitoring:", error);
       update((s) => ({
         ...s,
         isServerReachable: false,
@@ -185,9 +188,9 @@ function createConnectivityStore() {
       await commands.connectivityStopMonitoring();
       isMonitoring = false;
       eventHandlers = {};
-      console.log("[ConnectivityStore] Stopped monitoring");
+      log.debug("Stopped monitoring");
     } catch (error) {
-      console.error("[ConnectivityStore] Failed to stop monitoring:", error);
+      log.error("Failed to stop monitoring:", error);
     }
   }
 
@@ -198,7 +201,7 @@ function createConnectivityStore() {
     try {
       await commands.connectivitySetServerUrl(url);
     } catch (error) {
-      console.error("[ConnectivityStore] Failed to set server URL:", error);
+      log.error("Failed to set server URL:", error);
     }
   }