Enable devtools in release builds + add frontend logging

- Enable Tauri devtools feature so right-click Inspect works in release
- Open devtools automatically on launch for debugging
- Add log_frontend command: frontend can write to ~/.voicetonotes/frontend.log
- Sidecar logs go to %LOCALAPPDATA%/com.voicetonotes.app/sidecar.log
- Frontend logs go to %USERPROFILE%/.voicetonotes/frontend.log

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src-tauri/src/commands/system.rs

@@ -60,3 +60,18 @@ pub fn llama_list_models() -> Value {
 pub fn get_data_dir() -> String {
     LlamaManager::data_dir().to_string_lossy().to_string()
 }
+
+/// Log a message from the frontend to a file for debugging.
+#[tauri::command]
+pub fn log_frontend(level: String, message: String) {
+    use std::io::Write;
+    let log_path = LlamaManager::data_dir().join("frontend.log");
+    if let Ok(mut file) = std::fs::OpenOptions::new()
+        .create(true)
+        .append(true)
+        .open(&log_path)
+    {
+        let timestamp = chrono::Local::now().format("%Y-%m-%d %H:%M:%S");
+        let _ = writeln!(file, "[{timestamp}] [{level}] {message}");
+    }
+}

src-tauri/src/lib.rs

@@ -15,7 +15,9 @@ use commands::project::{
 };
 use commands::settings::{load_settings, save_settings};
 use commands::sidecar::{check_sidecar, check_sidecar_update, download_sidecar};
-use commands::system::{get_data_dir, llama_list_models, llama_start, llama_status, llama_stop};
+use commands::system::{
+    get_data_dir, llama_list_models, llama_start, llama_status, llama_stop, log_frontend,
+};
 use commands::transcribe::{download_diarize_model, run_pipeline, transcribe_file};
 use state::AppState;
 
@@ -39,6 +41,8 @@ pub fn run() {
             // Set the webview background to match the app's dark theme
             if let Some(window) = app.get_webview_window("main") {
                 let _ = window.set_background_color(Some(Color(10, 10, 35, 255)));
+                // Enable right-click → Inspect (requires "devtools" feature in Cargo.toml)
+                window.open_devtools();
             }
             Ok(())
         })
@@ -69,6 +73,7 @@ pub fn run() {
             check_sidecar,
             download_sidecar,
             check_sidecar_update,
+            log_frontend,
         ])
         .run(tauri::generate_context!())
         .expect("error while running tauri application");