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/stores/queue.ts

@@ -7,8 +7,8 @@
 // TRACES: UR-005, UR-015 | DR-005, DR-020
 
 import { writable, derived, get } from "svelte/store";
-import { invoke } from "@tauri-apps/api/core";
 import { listen } from "@tauri-apps/api/event";
+import { commands } from "$lib/api/bindings";
 import type { MediaItem } from "$lib/api/types";
 import { auth } from "$lib/stores/auth";
 
@@ -72,7 +72,7 @@ function createQueueStore() {
    */
   async function syncFromRust(): Promise<void> {
     try {
-      const rustQueue = await invoke<QueueChangedEvent>("player_get_queue");
+      const rustQueue = (await commands.playerGetQueue()) as unknown as QueueChangedEvent;
       console.log("[Queue] Synced from Rust - items:", rustQueue.items.length);
       set({
         items: rustQueue.items,
@@ -105,37 +105,37 @@ function createQueueStore() {
 
   // TRACES: UR-005, UR-015 | DR-005
   async function next() {
-    await invoke("player_next");
+    await commands.playerNext();
   }
 
   // TRACES: UR-005, UR-015 | DR-005
   async function previous() {
-    await invoke("player_previous");
+    await commands.playerPrevious();
   }
 
   // TRACES: UR-005, UR-015 | DR-005, DR-020
   async function skipTo(index: number) {
-    await invoke("player_skip_to", { index });
+    await commands.playerSkipTo(index);
   }
 
   // TRACES: UR-005, UR-015 | DR-005
   async function toggleShuffle() {
-    await invoke("player_toggle_shuffle");
+    await commands.playerToggleShuffle();
   }
 
   // TRACES: UR-005, UR-015 | DR-005
   async function cycleRepeat() {
-    await invoke("player_cycle_repeat");
+    await commands.playerCycleRepeat();
   }
 
   // TRACES: UR-015 | DR-020
   async function removeFromQueue(index: number) {
-    await invoke("player_remove_from_queue", { index });
+    await commands.playerRemoveFromQueue(index);
   }
 
   // TRACES: UR-015 | DR-020
   async function moveInQueue(fromIndex: number, toIndex: number) {
-    await invoke("player_move_in_queue", { fromIndex, toIndex });
+    await commands.playerMoveInQueue(fromIndex, toIndex);
   }
 
   // TRACES: UR-015 | DR-020
@@ -152,20 +152,14 @@ function createQueueStore() {
 
     // Use new Rust commands that accept IDs only
     if (trackIds.length === 1) {
-      await invoke("player_add_track_by_id", {
-        repositoryHandle,
-        request: {
-          trackId: trackIds[0],
-          position,
-        },
+      await commands.playerAddTrackById(repositoryHandle, {
+        trackId: trackIds[0],
+        position,
       });
     } else {
-      await invoke("player_add_tracks_by_ids", {
-        repositoryHandle,
-        request: {
-          trackIds,
-          position,
-        },
+      await commands.playerAddTracksByIds(repositoryHandle, {
+        trackIds,
+        position,
       });
     }
   }