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/playbackReporting.ts

@@ -9,7 +9,7 @@
 //
 // TRACES: UR-005, UR-019, UR-025 | DR-028, DR-047
 
-import { invoke } from "@tauri-apps/api/core";
+import { commands } from "$lib/api/bindings";
 import { auth } from "$lib/stores/auth";
 
 /**
@@ -42,13 +42,7 @@ export async function reportPlaybackStart(
   // Update local DB with context (always works, even offline)
   if (userId) {
     try {
-      await invoke("storage_update_playback_context", {
-        userId,
-        itemId,
-        positionTicks,
-        contextType,
-        contextId,
-      });
+      await commands.storageUpdatePlaybackContext(userId, itemId, positionTicks, contextType, contextId);
     } catch (e) {
       console.error("[PlaybackReporting] Failed to update playback context:", e);
     }
@@ -79,11 +73,7 @@ export async function reportPlaybackProgress(
   // Update local DB only (progress updates are frequent, don't report to server)
   if (userId) {
     try {
-      await invoke("storage_update_playback_progress", {
-        userId,
-        itemId,
-        positionTicks,
-      });
+      await commands.storageUpdatePlaybackProgress(userId, itemId, positionTicks);
     } catch (e) {
       console.error("[PlaybackReporting] Failed to update local progress:", e);
     }
@@ -107,11 +97,7 @@ export async function reportPlaybackStopped(itemId: string, positionSeconds: num
   // Update local DB first (always works, even offline)
   if (userId) {
     try {
-      await invoke("storage_update_playback_progress", {
-        userId,
-        itemId,
-        positionTicks,
-      });
+      await commands.storageUpdatePlaybackProgress(userId, itemId, positionTicks);
     } catch (e) {
       console.error("[PlaybackReporting] Failed to update local progress:", e);
     }
@@ -143,7 +129,7 @@ export async function markAsPlayed(itemId: string): Promise<void> {
   // Update local DB first
   if (userId) {
     try {
-      await invoke("storage_mark_played", { userId, itemId });
+      await commands.storageMarkPlayed(userId, itemId);
     } catch (e) {
       console.error("[PlaybackReporting] Failed to mark as played in local DB:", e);
     }