chore(tauri): remove dead code warnings and drop unused uuid dep

- Delete unused Provider::new, ProviderManager::get_current_provider
- Delete unused AppState::reload
- Remove uuid crate and related imports
- Keep functionality unchanged; frontend uses ID string for current provider

src-tauri/Cargo.toml

@@ -23,8 +23,6 @@ serde = { version = "1.0", features = ["derive"] }
 log = "0.4"
 tauri = { version = "2.8.2", features = [] }
 tauri-plugin-log = "2"
-tauri-plugin-store = "2"
 tauri-plugin-shell = "2"
 tauri-plugin-opener = "2"
 dirs = "5.0"
-uuid = { version = "1.11", features = ["v4", "serde"] }