Migrate all IPC call sites to typed tauri-specta commands.*

Replace the remaining ~155 untyped invoke() calls across stores, services,
components, and routes with the generated commands.* wrappers from
$lib/api/bindings, so every IPC call is compile-time-checked against the
command signatures.

- Register repository_get_subtitle_url and repository_get_video_download_url
  in specta_builder() and the invoke_handler; regenerate bindings.ts.
- Source duplicated wire types (AutoplaySettings, CacheConfig, Session,
  ConnectivityStatus, audio/video settings, etc.) from bindings.
- Fix two bugs surfaced by the typed wrappers:
  - VideoDownloadButton passed an un-awaited Promise as the stream URL.
  - setAutoplaySettings omitted the required userId argument.
- Update unit tests asserting the old invoke(name, args) shape.
- Remove the five param-naming guard tests; the compiler and codegen now
  enforce what they checked.

svelte-check: 0 errors. vitest: green. cargo test --lib: green.

src/lib/services/syncService.ts

@@ -6,7 +6,7 @@
 //
 // TRACES: UR-002, UR-017, UR-025 | DR-014
 
-import { invoke } from "@tauri-apps/api/core";
+import { commands } from "$lib/api/bindings";
 import { auth } from "$lib/stores/auth";
 
 // Types matching Rust structs
@@ -73,12 +73,12 @@ class SyncService {
       throw new Error("Not authenticated");
     }
 
-    const id = await invoke<number>("sync_queue_mutation", {
+    const id = await commands.syncQueueMutation(
       userId,
       operation,
       itemId,
-      payload: payload ? JSON.stringify(payload) : null,
-    });
+      payload ? JSON.stringify(payload) : null
+    );
 
     console.log(`[SyncService] Queued ${operation} for item ${itemId}, id: ${id}`);
     return id;
@@ -90,11 +90,7 @@ class SyncService {
    */
   async queueFavorite(itemId: string, isFavorite: boolean): Promise<number> {
     // Update local state first
-    await invoke("storage_toggle_favorite", {
-      userId: auth.getUserId(),
-      itemId,
-      isFavorite,
-    });
+    await commands.storageToggleFavorite(auth.getUserId() ?? "", itemId, isFavorite);
 
     return this.queueMutation(
       isFavorite ? "mark_favorite" : "unmark_favorite",
@@ -111,11 +107,7 @@ class SyncService {
     positionTicks: number
   ): Promise<number> {
     // Update local state first
-    await invoke("storage_update_playback_progress", {
-      userId: auth.getUserId(),
-      itemId,
-      positionTicks,
-    });
+    await commands.storageUpdatePlaybackProgress(auth.getUserId() ?? "", itemId, positionTicks);
 
     return this.queueMutation("update_progress", itemId, { positionTicks });
   }
@@ -126,10 +118,7 @@ class SyncService {
    */
   async queueMarkPlayed(itemId: string): Promise<number> {
     // Update local state first
-    await invoke("storage_mark_played", {
-      userId: auth.getUserId(),
-      itemId,
-    });
+    await commands.storageMarkPlayed(auth.getUserId() ?? "", itemId);
 
     return this.queueMutation("mark_played", itemId);
   }
@@ -143,7 +132,7 @@ class SyncService {
       return 0;
     }
 
-    return invoke<number>("sync_get_pending_count", { userId });
+    return commands.syncGetPendingCount(userId);
   }
 
   /**
@@ -155,17 +144,14 @@ class SyncService {
       return [];
     }
 
-    return invoke<SyncQueueItem[]>("sync_get_pending", {
-      userId,
-      limit,
-    });
+    return commands.syncGetPending(userId, limit ?? null);
   }
 
   /**
    * Clean up completed operations older than specified days
    */
   async cleanup(daysOld: number = 7): Promise<number> {
-    const deleted = await invoke<number>("sync_cleanup_completed", { daysOld });
+    const deleted = await commands.syncCleanupCompleted(daysOld);
     console.log(`[SyncService] Cleaned up ${deleted} old completed operations`);
     return deleted;
   }
@@ -204,7 +190,7 @@ class SyncService {
   async clearUser(): Promise<void> {
     const userId = auth.getUserId();
     if (userId) {
-      await invoke("sync_clear_user", { userId });
+      await commands.syncClearUser(userId);
       console.log("[SyncService] Cleared sync queue for user");
     }
   }