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/Queue.svelte

@@ -1,5 +1,5 @@
 <script lang="ts">
-  import { invoke } from "@tauri-apps/api/core";
+  import { commands } from "$lib/api/bindings";
   import { dndzone, SOURCES, TRIGGERS } from "svelte-dnd-action";
   import type { MediaItem } from "$lib/api/types";
   import { auth } from "$lib/stores/auth";
@@ -79,10 +79,7 @@
         queue.moveInQueue(fromIndex, toIndex);
 
         // Sync with backend
-        await invoke("player_move_in_queue", {
-          fromIndex,
-          toIndex,
-        });
+        await commands.playerMoveInQueue(fromIndex, toIndex);
       } catch (e) {
         console.error("Failed to move queue item:", e);
         // The store already updated optimistically, refresh if needed
@@ -109,7 +106,7 @@
     e.stopPropagation();
     try {
       queue.removeFromQueue(index);
-      await invoke("player_remove_from_queue", { index });
+      await commands.playerRemoveFromQueue(index);
     } catch (err) {
       console.error("Failed to remove from queue:", err);
     }