refactor(backend): alihkan Settings ke zesdex-cms JsonSettingsRepository

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

crates/zesdex-backend/src/app/state/rest.rs

@@ -17,7 +17,9 @@ use crate::app::mcp::manager::McpManager;
 use crate::app::workflow::engine::WorkflowEngine;
 use crate::model::app_config::AppConfig;
 use crate::model::editlog::EditLog;
-use crate::model::settings::Settings;
+use zesdex_cms::domain::repository::SettingsRepository;
+use zesdex_cms::domain::settings::Settings;
+use zesdex_cms::infrastructure::persistence::settings_repo::JsonSettingsRepository;
 
 /// A single transcript entry rendered in the TUI chat pane.
 #[derive(Debug, Clone, PartialEq)]
@@ -86,7 +88,10 @@ impl AppStateRest {
     /// no parent, and to an empty session id when the dir name can't be
     /// read, so construction never fails.
     pub fn new(workspace_roots: Vec<PathBuf>, session_dir: &std::path::Path, memory_dir: PathBuf) -> Self {
-        let settings = Settings::load();
+        let store_base_dir = zesdex_entities::seaorm::common::store::Store::new().base_dir;
+        let settings = JsonSettingsRepository::new()
+            .load(&store_base_dir)
+            .unwrap_or_default();
         let app_config = AppConfig::load();
         let worktrees_dir = memory_dir.parent().unwrap_or_else(|| {
             tracing::warn!("[state] memory_dir '{}' has no parent, using it for worktrees", memory_dir.display());