feat(cast): add multi-protocol support for Chromecast, DLNA, and AirPlay

- Update CastPicker to show protocol tabs with device counts
- Register DLNA and AirPlay state and commands in lib.rs
- Add Deserialize derive to DlnaMetadata and AirPlayMetadata
- Fix capabilities file (remove unavailable fs permissions)
- Remove unused IpAddr import in media_server.rs

src-tauri/Cargo.toml

@@ -14,7 +14,7 @@ tauri-build = { version = "2", features = [] }
 
 [dependencies]
 # Tauri
-tauri = { version = "2", features = [] }
+tauri = { version = "2", features = ["protocol-asset"] }
 tauri-plugin-opener = "2"
 
 # Serialization

src-tauri/capabilities/default.json

@@ -8,16 +8,6 @@
     "opener:default",
     "dialog:default",
     "clipboard-manager:default",
-    "clipboard-manager:allow-write-text",
-    "fs:default",
-    {
-      "identifier": "fs:allow-read",
-      "allow": [
-        { "path": "$HOME/**" },
-        { "path": "$CACHE/**" },
-        { "path": "$CONFIG/**" },
-        { "path": "/**" }
-      ]
-    }
+    "clipboard-manager:allow-write-text"
   ]
 }

src-tauri/src/cast/airplay/device.rs

@@ -1,11 +1,11 @@
 //! AirPlay device connection and streaming (placeholder)
 
-use serde::Serialize;
+use serde::{Deserialize, Serialize};
 
 use crate::cast::airplay::{AirPlayError, DiscoveredAirPlayDevice};
 
 /// Metadata for AirPlay playback
-#[derive(Debug, Clone, Serialize)]
+#[derive(Debug, Clone, Serialize, Deserialize)]
 pub struct AirPlayMetadata {
     pub title: String,
     pub artist: String,

src-tauri/src/cast/dlna/device.rs

@@ -1,11 +1,11 @@
 //! DLNA device connection and playback (placeholder)
 
-use serde::Serialize;
+use serde::{Deserialize, Serialize};
 
 use crate::cast::dlna::{DiscoveredDlnaDevice, DlnaError};
 
 /// Metadata for DLNA playback
-#[derive(Debug, Clone, Serialize)]
+#[derive(Debug, Clone, Serialize, Deserialize)]
 pub struct DlnaMetadata {
     pub title: String,
     pub artist: String,

src-tauri/src/cast/media_server.rs

@@ -3,7 +3,7 @@
 use std::collections::HashMap;
 use std::fs::File;
 use std::io::{Read, Seek, SeekFrom};
-use std::net::{IpAddr, SocketAddr, UdpSocket};
+use std::net::{SocketAddr, UdpSocket};
 use std::path::{Path, PathBuf};
 use std::sync::atomic::{AtomicBool, Ordering};
 use std::sync::{Arc, Mutex};

src-tauri/src/lib.rs

@@ -96,9 +96,13 @@ pub fn run() {
     let library_state = library::init_library_state()
         .expect("Failed to initialize library database");
 
-    // Initialize casting state
+    // Initialize casting state (Chromecast, DLNA, AirPlay)
     let cast_state = cast::CastState::new()
-        .expect("Failed to initialize casting state");
+        .expect("Failed to initialize Chromecast state");
+    let dlna_state = cast::dlna::commands::DlnaState::new()
+        .expect("Failed to initialize DLNA state");
+    let airplay_state = cast::airplay::commands::AirPlayState::new()
+        .expect("Failed to initialize AirPlay state");
 
     // Initialize download cache state
     let download_cache_state = download_cache::DownloadCacheState::new()
@@ -111,6 +115,8 @@ pub fn run() {
         .manage(AppState::new())
         .manage(library_state)
         .manage(cast_state)
+        .manage(dlna_state)
+        .manage(airplay_state)
         .manage(download_cache_state)
         .invoke_handler(tauri::generate_handler![
             // Auth commands
@@ -236,6 +242,30 @@ pub fn run() {
             cast::commands::cast_stop,
             cast::commands::cast_seek,
             cast::commands::cast_set_volume,
+            // DLNA casting commands
+            cast::dlna::commands::dlna_start_discovery,
+            cast::dlna::commands::dlna_stop_discovery,
+            cast::dlna::commands::dlna_get_devices,
+            cast::dlna::commands::dlna_connect,
+            cast::dlna::commands::dlna_disconnect,
+            cast::dlna::commands::dlna_get_status,
+            cast::dlna::commands::dlna_load_media,
+            cast::dlna::commands::dlna_play,
+            cast::dlna::commands::dlna_pause,
+            cast::dlna::commands::dlna_stop,
+            cast::dlna::commands::dlna_set_volume,
+            // AirPlay casting commands
+            cast::airplay::commands::airplay_start_discovery,
+            cast::airplay::commands::airplay_stop_discovery,
+            cast::airplay::commands::airplay_get_devices,
+            cast::airplay::commands::airplay_connect,
+            cast::airplay::commands::airplay_disconnect,
+            cast::airplay::commands::airplay_get_status,
+            cast::airplay::commands::airplay_load_media,
+            cast::airplay::commands::airplay_play,
+            cast::airplay::commands::airplay_pause,
+            cast::airplay::commands::airplay_stop,
+            cast::airplay::commands::airplay_set_volume,
             // Download cache commands
             download_cache::commands::download_track,
             download_cache::commands::is_track_downloaded,