feat(transcoding): add FFmpeg HLS transcoding support

- Introduced `TranscodeManager` for managing on-demand transcoding of local video files.
- Added configuration options for transcoding in `Config` and `LocalFilesConfig`.
- Implemented new API routes for managing transcoding settings, stats, and cache.
- Updated `LocalFilesProvider` to support transcoding capabilities.
- Created frontend components for managing transcode settings and displaying stats.
- Added database migration for transcode settings.
- Enhanced existing routes and DTOs to accommodate new transcoding features.

k-tv-frontend/lib/api.ts

@@ -12,6 +12,8 @@ import type {
   SeriesResponse,
   LibraryItemResponse,
   MediaFilter,
+  TranscodeSettings,
+  TranscodeStats,
 } from "@/lib/types";
 
 const API_BASE =
@@ -155,6 +157,24 @@ export const api = {
       request<{ items_found: number }>("/files/rescan", { method: "POST", token }),
   },
 
+  transcode: {
+    getSettings: (token: string) =>
+      request<TranscodeSettings>("/files/transcode-settings", { token }),
+
+    updateSettings: (data: TranscodeSettings, token: string) =>
+      request<TranscodeSettings>("/files/transcode-settings", {
+        method: "PUT",
+        body: JSON.stringify(data),
+        token,
+      }),
+
+    getStats: (token: string) =>
+      request<TranscodeStats>("/files/transcode-stats", { token }),
+
+    clearCache: (token: string) =>
+      request<void>("/files/transcode-cache", { method: "DELETE", token }),
+  },
+
   schedule: {
     generate: (channelId: string, token: string) =>
       request<ScheduleResponse>(`/channels/${channelId}/schedule`, {

k-tv-frontend/lib/types.ts

@@ -93,6 +93,16 @@ export interface ProviderCapabilities {
   search: boolean;
   streaming_protocol: StreamingProtocol;
   rescan: boolean;
+  transcode: boolean;
+}
+
+export interface TranscodeSettings {
+  cleanup_ttl_hours: number;
+}
+
+export interface TranscodeStats {
+  cache_size_bytes: number;
+  item_count: number;
 }
 
 export interface ProviderInfo {