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/playerEvents.ts

@@ -9,7 +9,7 @@
  */
 
 import { listen, type UnlistenFn } from "@tauri-apps/api/event";
-import { invoke } from "@tauri-apps/api/core";
+import { commands } from "$lib/api/bindings";
 import { player, playbackPosition } from "$lib/stores/player";
 import { queue, currentQueueItem } from "$lib/stores/queue";
 import { playbackMode } from "$lib/stores/playbackMode";
@@ -230,12 +230,7 @@ async function handleStateChanged(state: string, _mediaId: string | null): Promi
  */
 async function updateQueueStatus(): Promise<void> {
   try {
-    const queueStatus = await invoke<{
-      hasNext: boolean;
-      hasPrevious: boolean;
-      shuffle: boolean;
-      repeat: string;
-    }>("player_get_queue");
+    const queueStatus = await commands.playerGetQueue();
 
     // Import appState stores dynamically to avoid circular imports
     const { hasNext, hasPrevious, shuffle, repeat } = await import("$lib/stores/appState");
@@ -266,7 +261,7 @@ function handleMediaLoaded(duration: number): void {
 async function handlePlaybackEnded(): Promise<void> {
   // Call backend to handle autoplay decision (queue advance, sleep timer, episode popup, etc.)
   try {
-    await invoke("player_on_playback_ended");
+    await commands.playerOnPlaybackEnded(null, null);
   } catch (e) {
     console.error("[playerEvents] Failed to handle playback ended:", e);
     // Fallback: set idle state on error
@@ -284,7 +279,7 @@ async function handleError(message: string, recoverable: boolean): Promise<void>
   // Stop backend player to prevent orphaned playback
   // This also reports playback stopped to Jellyfin server
   try {
-    await invoke("player_stop");
+    await commands.playerStop();
     console.log("Backend player stopped after error");
   } catch (e) {
     console.error("Failed to stop player after error:", e);