feat: config vaults desktop — VaultConfig, add_vault, remove_vault, list_vaults

- AppConfig: nouveau champ vaults: Vec<VaultConfig> (name + path)
- spawn_backend: passe VAULT_N_NAME / VAULT_N_PATH en variables d'env
- Commandes Tauri: add_vault, remove_vault, list_vaults
- Nécessite restart_backend() pour appliquer les changements

desktop/src/main.rs

@@ -16,9 +16,16 @@ struct BackendProcess {
     restarting: Mutex<bool>,
 }
 
+#[derive(Debug, Serialize, Deserialize, Clone)]
+struct VaultConfig {
+    name: String,
+    path: String,
+}
+
 #[derive(Debug, Serialize, Deserialize, Clone)]
 struct AppConfig {
     vault_path: Option<String>,
+    vaults: Vec<VaultConfig>,
     window_x: Option<f64>,
     window_y: Option<f64>,
     window_width: Option<f64>,
@@ -29,6 +36,7 @@ impl Default for AppConfig {
     fn default() -> Self {
         Self {
             vault_path: None,
+            vaults: Vec::new(),
             window_x: None,
             window_y: None,
             window_width: Some(1200.0),
@@ -123,9 +131,19 @@ fn spawn_backend(exe_dir: &PathBuf) -> Result<Child, String> {
     let data_dir = app_data_dir();
     let _ = fs::create_dir_all(data_dir.join("data"));
 
-    let child = Command::new(&python)
-        .current_dir(&data_dir)
-        .env("PYTHONPATH", exe_dir)
+    let mut cmd = Command::new(&python);
+    cmd.current_dir(&data_dir)
+        .env("PYTHONPATH", exe_dir);
+
+    // Pass vault config as env vars (VAULT_1_NAME, VAULT_1_PATH, etc.)
+    let config = load_config();
+    for (i, vault) in config.vaults.iter().enumerate() {
+        let n = i + 1;
+        cmd.env(format!("VAULT_{}_NAME", n), &vault.name);
+        cmd.env(format!("VAULT_{}_PATH", n), &vault.path);
+    }
+
+    let child = cmd
         .args([
             "-m", "uvicorn",
             "backend.main:app",
@@ -235,6 +253,31 @@ fn get_system_theme(app: tauri::AppHandle) -> String {
     }
 }
 
+#[tauri::command]
+fn add_vault(name: String, path: String) -> Result<(), String> {
+    let mut config = load_config();
+    // Avoid duplicates
+    config.vaults.retain(|v| v.name != name);
+    config.vaults.push(VaultConfig { name: name.clone(), path });
+    save_config(&config);
+    info!("Vault added: {} — restart backend to apply", name);
+    Ok(())
+}
+
+#[tauri::command]
+fn remove_vault(name: String) -> Result<(), String> {
+    let mut config = load_config();
+    config.vaults.retain(|v| v.name != name);
+    save_config(&config);
+    info!("Vault removed: {} — restart backend to apply", name);
+    Ok(())
+}
+
+#[tauri::command]
+fn list_vaults() -> Vec<VaultConfig> {
+    load_config().vaults
+}
+
 #[tauri::command]
 fn restart_backend(state: tauri::State<BackendProcess>) -> Result<String, String> {
     let mut restarting = state.restarting.lock().map_err(|e| e.to_string())?;
@@ -393,6 +436,9 @@ fn main() {
             check_backend_health,
             save_window_state,
             get_window_state,
+            add_vault,
+            remove_vault,
+            list_vaults,
         ])
         .setup(move |app| {
             // Restore window position/size