feat(settings): add quick messages management with drag-and-drop sorting

Adds a new "Quick Messages" settings page below Experts for managing reusable title/content snippets, backed by SQLite via SeaORM and exposed through both Tauri commands and the Axum web router. The list supports drag-to-reorder using the same motion/react Reorder pattern as the agent list, with translations provided across all 10 supported locales.

src-tauri/src/models/mod.rs

@@ -4,6 +4,7 @@ pub mod conversation;
 pub mod folder;
 pub mod message;
 pub mod model_provider;
+pub mod quick_message;
 pub mod system;
 
 pub use agent::AgentType;
@@ -15,6 +16,7 @@ pub use conversation::{
     SidebarData,
 };
 pub use folder::{FolderCommandInfo, FolderDetail, FolderHistoryEntry, OpenedTab};
+pub use quick_message::QuickMessageInfo;
 pub use message::{
     AgentExecutionStats, AgentToolCall, ContentBlock, MessageRole, MessageTurn, TurnRole,
     TurnUsage, UnifiedMessage,

src-tauri/src/models/quick_message.rs

@@ -0,0 +1,12 @@
+use chrono::{DateTime, Utc};
+use serde::Serialize;
+
+#[derive(Debug, Clone, Serialize)]
+pub struct QuickMessageInfo {
+    pub id: i32,
+    pub title: String,
+    pub content: String,
+    pub sort_order: i32,
+    pub created_at: DateTime<Utc>,
+    pub updated_at: DateTime<Utc>,
+}