feat: add WorkspaceMode (local/webdav) and per-workspace theme to config

Introduces WorkspaceMode enum with local and webdav variants, plus a
theme field on WorkspaceConfig. Adds set_workspace_theme and
add_webdav_workspace Tauri commands. WebDAV workspaces auto-manage
local files in app data dir.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

apps/tauri/src-tauri/src/lib.rs

@@ -11,7 +11,7 @@ use tauri::{Emitter, Manager, State};
 use uuid::Uuid;
 
 use onyx_core::{
-    config::{AppConfig, WorkspaceConfig},
+    config::{AppConfig, WorkspaceConfig, WorkspaceMode},
     models::{Task, TaskList, TaskStatus},
     repository::TaskRepository,
     sync::{self, SyncMode, SyncResult as CoreSyncResult},
@@ -31,6 +31,7 @@ static LAST_WRITE: Mutex<Option<Instant>> = Mutex::new(None);
 struct AppState {
     config: AppConfig,
     config_path: PathBuf,
+    app_data_dir: PathBuf,
     repo: Option<TaskRepository>,
 }
 
@@ -417,6 +418,53 @@ fn set_webdav_config(
         .map_err(|e| e.to_string())
 }
 
+#[tauri::command]
+fn set_workspace_theme(
+    workspace_name: String,
+    theme: Option<String>,
+    state: State<'_, Mutex<AppState>>,
+) -> Result<(), String> {
+    let mut s = lock_state(&state)?;
+    if let Some(ws) = s.config.workspaces.get_mut(&workspace_name) {
+        ws.theme = theme;
+    }
+    s.config.save_to_file(&s.config_path.clone()).map_err(|e| e.to_string())
+}
+
+#[tauri::command]
+fn add_webdav_workspace(
+    name: String,
+    webdav_url: String,
+    username: String,
+    password: String,
+    state: State<'_, Mutex<AppState>>,
+) -> Result<(), String> {
+    let mut s = lock_state(&state)?;
+    let managed_dir = s.app_data_dir.join("workspaces").join(&name);
+    std::fs::create_dir_all(&managed_dir).map_err(|e| e.to_string())?;
+    TaskRepository::init(managed_dir.clone()).map(|_| ()).map_err(|e| e.to_string())?;
+
+    let mut ws = WorkspaceConfig::new(managed_dir);
+    ws.mode = WorkspaceMode::Webdav;
+    ws.webdav_url = Some(webdav_url.clone());
+
+    s.config.add_workspace(name.clone(), ws);
+    s.config.set_current_workspace(name).map_err(|e| e.to_string())?;
+    s.repo = None;
+
+    // Store credentials keyed by hostname
+    let domain = webdav_url
+        .split("://")
+        .nth(1)
+        .and_then(|rest| rest.split('/').next())
+        .unwrap_or("")
+        .to_string();
+    s.config.save_to_file(&s.config_path.clone()).map_err(|e| e.to_string())?;
+    drop(s);
+    webdav::store_credentials(&domain, &username, &password).map_err(|e| e.to_string())?;
+    Ok(())
+}
+
 #[tauri::command]
 fn store_credentials(
     domain: String,
@@ -545,23 +593,18 @@ pub fn run() {
         .plugin(tauri_plugin_dialog::init())
         .plugin(tauri_plugin_os::init())
         .setup(|app| {
-            // Resolve config path: Tauri's app_data_dir on Android, directories crate on desktop
+            // Resolve app data dir and config path
+            let app_data_dir = app.path().app_data_dir()
+                .map_err(|e| format!("Failed to get app data dir: {}", e))?;
             let config_path = {
                 #[cfg(target_os = "android")]
-                {
-                    use tauri::Manager;
-                    app.path().app_data_dir()
-                        .map_err(|e| format!("Failed to get app data dir: {}", e))?
-                        .join("config.json")
-                }
+                { app_data_dir.join("config.json") }
                 #[cfg(not(target_os = "android"))]
-                {
-                    AppConfig::get_config_path()
-                }
+                { AppConfig::get_config_path() }
             };
             let config = AppConfig::load_from_file(&config_path).unwrap_or_default();
             let workspace_path = config.get_current_workspace().ok().map(|(_, ws)| ws.path.clone());
-            app.manage(Mutex::new(AppState { config, config_path, repo: None }));
+            app.manage(Mutex::new(AppState { config, config_path, app_data_dir, repo: None }));
 
             #[cfg(not(target_os = "android"))]
             if let Some(path) = workspace_path {
@@ -591,6 +634,8 @@ pub fn run() {
             set_group_by_due_date,
             get_group_by_due_date,
             set_webdav_config,
+            set_workspace_theme,
+            add_webdav_workspace,
             store_credentials,
             load_credentials,
             test_webdav_connection,

apps/tauri/src/lib/types.ts

@@ -19,10 +19,14 @@ export interface TaskList {
   group_by_due_date: boolean;
 }
 
+export type WorkspaceMode = "local" | "webdav";
+
 export interface WorkspaceConfig {
   path: string;
+  mode: WorkspaceMode;
   webdav_url: string | null;
   last_sync: string | null;
+  theme: string | null;
 }
 
 export interface AppConfig {

crates/onyx-core/src/config.rs

@@ -3,18 +3,35 @@ use std::path::PathBuf;
 use serde::{Deserialize, Serialize};
 use crate::error::{Error, Result};
 
+#[derive(Debug, Clone, Serialize, Deserialize, PartialEq)]
+#[serde(rename_all = "lowercase")]
+pub enum WorkspaceMode {
+    Local,
+    Webdav,
+}
+
+impl Default for WorkspaceMode {
+    fn default() -> Self {
+        Self::Local
+    }
+}
+
 #[derive(Debug, Clone, Serialize, Deserialize)]
 pub struct WorkspaceConfig {
     pub path: PathBuf,
+    #[serde(default)]
+    pub mode: WorkspaceMode,
     #[serde(skip_serializing_if = "Option::is_none", default)]
     pub webdav_url: Option<String>,
     #[serde(skip_serializing_if = "Option::is_none", default)]
     pub last_sync: Option<chrono::DateTime<chrono::Utc>>,
+    #[serde(skip_serializing_if = "Option::is_none", default)]
+    pub theme: Option<String>,
 }
 
 impl WorkspaceConfig {
     pub fn new(path: PathBuf) -> Self {
-        Self { path, webdav_url: None, last_sync: None }
+        Self { path, mode: WorkspaceMode::Local, webdav_url: None, last_sync: None, theme: None }
     }
 }
 
@@ -229,7 +246,7 @@ mod tests {
         let temp_dir = TempDir::new().unwrap();
         let config_path = temp_dir.path().join("config.json");
 
-        // Write old-format JSON without webdav_url or last_sync fields
+        // Write old-format JSON without webdav_url, last_sync, mode, or theme fields
         let old_json = r#"{
             "workspaces": {
                 "personal": { "path": "/home/user/tasks" }
@@ -243,5 +260,7 @@ mod tests {
         assert_eq!(ws.path, PathBuf::from("/home/user/tasks"));
         assert!(ws.webdav_url.is_none());
         assert!(ws.last_sync.is_none());
+        assert_eq!(ws.mode, WorkspaceMode::Local);
+        assert!(ws.theme.is_none());
     }
 }