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/components/player/MiniPlayer.svelte

@@ -14,7 +14,7 @@
    * @req: UR-010 - Control playback of Jellyfin remote sessions
    */
 
-  import { invoke } from "@tauri-apps/api/core";
+  import { commands } from "$lib/api/bindings";
   import { goto } from "$app/navigation";
   import type { MediaItem } from "$lib/api/types";
   import { auth } from "$lib/stores/auth";
@@ -105,23 +105,23 @@
 
   // Control handlers for Controls component
   async function handlePlayPause() {
-    await invoke("player_toggle");
+    await commands.playerToggle();
   }
 
   async function handlePrevious() {
-    await invoke("player_previous");
+    await commands.playerPrevious();
   }
 
   async function handleNext() {
-    await invoke("player_next");
+    await commands.playerNext();
   }
 
   async function handleToggleShuffle() {
-    await invoke("player_toggle_shuffle");
+    await commands.playerToggleShuffle();
   }
 
   async function handleCycleRepeat() {
-    await invoke("player_cycle_repeat");
+    await commands.playerCycleRepeat();
   }
 
   // Scrubbing (seek) handler
@@ -133,7 +133,7 @@
     const newPosition = percent * displayDuration;
 
     try {
-      await invoke("player_seek", { position: newPosition });
+      await commands.playerSeek(newPosition);
       haptics.tap();
     } catch (err) {
       console.error("Failed to seek:", err);