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/downloads.ts

@@ -1,7 +1,6 @@
 // Download manager state store
 // TRACES: UR-011, UR-013, UR-018 | DR-015, DR-017
 import { writable, derived, get } from 'svelte/store';
-import { invoke } from '@tauri-apps/api/core';
 import { commands } from '$lib/api/bindings';
 import { listen, type UnlistenFn } from '@tauri-apps/api/event';
 
@@ -95,13 +94,10 @@ function createDownloadsStore() {
 
 		try {
 			console.log('🔄 Refreshing downloads for user:', userId);
-			const response = await invoke<{ downloads: DownloadInfo[]; stats: DownloadStats }>(
-				'get_downloads',
-				{
-					userId,
-					statusFilter
-				}
-			);
+			const response = (await commands.getDownloads(
+				userId,
+				statusFilter ?? null
+			)) as unknown as { downloads: DownloadInfo[]; stats: DownloadStats };
 			console.log('   Got', response.downloads.length, 'downloads from backend');
 			console.log('   Stats:', response.stats);
 
@@ -182,11 +178,7 @@ function createDownloadsStore() {
 		async downloadAlbum(albumId: string, userId: string, basePath: string): Promise<number[]> {
 			try {
 				console.log('📥 downloadAlbum called:', { albumId, userId, basePath });
-				const downloadIds = await invoke<number[]>('download_album', {
-					albumId,
-					userId,
-					basePath
-				});
+				const downloadIds = await commands.downloadAlbum(albumId, userId, basePath);
 				console.log('   Got download IDs from backend:', downloadIds);
 
 				// Refresh downloads
@@ -267,13 +259,13 @@ function createDownloadsStore() {
 					basePath,
 					qualityPreset
 				});
-				const downloadIds = await invoke<number[]>('download_series', {
+				const downloadIds = await commands.downloadSeries(
 					seriesId,
 					seriesName,
 					userId,
 					basePath,
-					qualityPreset
-				});
+					qualityPreset ?? null
+				);
 				console.log('   Queued', downloadIds.length, 'episodes for download');
 
 				// Refresh downloads
@@ -306,15 +298,15 @@ function createDownloadsStore() {
 					seasonNumber,
 					qualityPreset
 				});
-				const downloadIds = await invoke<number[]>('download_season', {
+				const downloadIds = await commands.downloadSeason(
 					seasonId,
 					seriesName,
 					seasonName,
 					seasonNumber,
 					userId,
 					basePath,
-					qualityPreset
-				});
+					qualityPreset ?? null
+				);
 				console.log('   Queued', downloadIds.length, 'episodes for download');
 
 				// Refresh downloads
@@ -332,7 +324,7 @@ function createDownloadsStore() {
 		 */
 		async pinItem(itemId: string): Promise<void> {
 			try {
-				await invoke('pin_item', { itemId });
+				await commands.pinItem(itemId);
 			} catch (error) {
 				console.error('Failed to pin item:', error);
 				throw error;
@@ -344,7 +336,7 @@ function createDownloadsStore() {
 		 */
 		async unpinItem(itemId: string): Promise<void> {
 			try {
-				await invoke('unpin_item', { itemId });
+				await commands.unpinItem(itemId);
 			} catch (error) {
 				console.error('Failed to unpin item:', error);
 				throw error;
@@ -356,7 +348,7 @@ function createDownloadsStore() {
 		 */
 		async isItemPinned(itemId: string): Promise<boolean> {
 			try {
-				return await invoke<boolean>('is_item_pinned', { itemId });
+				return await commands.isItemPinned(itemId);
 			} catch (error) {
 				console.error('Failed to check pin status:', error);
 				return false;
@@ -368,7 +360,7 @@ function createDownloadsStore() {
 		 */
 		async pause(downloadId: number): Promise<void> {
 			try {
-				await invoke('pause_download', { downloadId });
+				await commands.pauseDownload(downloadId);
 			} catch (error) {
 				console.error('Failed to pause download:', error);
 				throw error;
@@ -380,7 +372,7 @@ function createDownloadsStore() {
 		 */
 		async resume(downloadId: number): Promise<void> {
 			try {
-				await invoke('resume_download', { downloadId });
+				await commands.resumeDownload(downloadId);
 			} catch (error) {
 				console.error('Failed to resume download:', error);
 				throw error;
@@ -392,7 +384,7 @@ function createDownloadsStore() {
 		 */
 		async cancel(downloadId: number): Promise<void> {
 			try {
-				await invoke('cancel_download', { downloadId });
+				await commands.cancelDownload(downloadId);
 			} catch (error) {
 				console.error('Failed to cancel download:', error);
 				throw error;
@@ -404,7 +396,7 @@ function createDownloadsStore() {
 		 */
 		async delete(downloadId: number): Promise<void> {
 			try {
-				await invoke('delete_download', { downloadId });
+				await commands.deleteDownload(downloadId);
 				update((state) => {
 					const { [downloadId]: removed, ...remaining } = state.downloads;
 					return { ...state, downloads: remaining };
@@ -574,11 +566,11 @@ function handleDownloadEvent(payload: DownloadEvent): void {
 		case 'completed':
 			if (download) {
 				// Persist to database
-				invoke('mark_download_completed', {
-					downloadId: payload.downloadId,
-					bytesDownloaded: payload.totalBytes || download.fileSize || download.bytesDownloaded,
-					filePath: payload.filePath || download.filePath
-				}).catch((err) => console.error('Failed to persist download completion:', err));
+				commands.markDownloadCompleted(
+					payload.downloadId,
+					payload.totalBytes || download.fileSize || download.bytesDownloaded,
+					payload.filePath || download.filePath
+				).catch((err) => console.error('Failed to persist download completion:', err));
 
 				updateDownloadInStore(payload.downloadId, {
 					status: 'completed',
@@ -592,10 +584,10 @@ function handleDownloadEvent(payload: DownloadEvent): void {
 		case 'failed':
 			if (download) {
 				// Persist to database
-				invoke('mark_download_failed', {
-					downloadId: payload.downloadId,
-					errorMessage: payload.error || 'Unknown error'
-				}).catch((err) => console.error('Failed to persist download failure:', err));
+				commands.markDownloadFailed(
+					payload.downloadId,
+					payload.error || 'Unknown error'
+				).catch((err) => console.error('Failed to persist download failure:', err));
 
 				updateDownloadInStore(payload.downloadId, {
 					status: 'failed',