初始化web服务功能

src-tauri/src/web/handlers/folders.rs

@@ -0,0 +1,58 @@
+use axum::{extract::Extension, Json};
+use serde::Deserialize;
+use tauri::Manager;
+
+use crate::app_error::AppCommandError;
+use crate::db::service::folder_service;
+use crate::db::AppDatabase;
+use crate::models::*;
+
+#[derive(Deserialize)]
+#[serde(rename_all = "camelCase")]
+pub struct FolderIdParams {
+    pub folder_id: i32,
+}
+
+pub async fn load_folder_history(
+    Extension(app): Extension<tauri::AppHandle>,
+) -> Result<Json<Vec<FolderHistoryEntry>>, AppCommandError> {
+    let db = app.state::<AppDatabase>();
+    let result = folder_service::list_folders(&db.conn)
+        .await
+        .map_err(AppCommandError::from)?;
+    Ok(Json(result))
+}
+
+pub async fn get_folder(
+    Extension(app): Extension<tauri::AppHandle>,
+    Json(params): Json<FolderIdParams>,
+) -> Result<Json<FolderDetail>, AppCommandError> {
+    let db = app.state::<AppDatabase>();
+    let folder = folder_service::get_folder_by_id(&db.conn, params.folder_id)
+        .await
+        .map_err(AppCommandError::from)?
+        .ok_or_else(|| AppCommandError::not_found("Folder not found"))?;
+    Ok(Json(folder))
+}
+
+#[derive(Deserialize)]
+#[serde(rename_all = "camelCase")]
+pub struct AddFolderParams {
+    pub path: String,
+}
+
+/// Web equivalent of `open_folder_window`: adds the folder to DB and returns its ID.
+/// The web client then navigates to `/folder?id=N` itself.
+pub async fn open_folder_window(
+    Extension(app): Extension<tauri::AppHandle>,
+    Json(params): Json<AddFolderParams>,
+) -> Result<Json<FolderHistoryEntry>, AppCommandError> {
+    let db = app.state::<AppDatabase>();
+    let entry = folder_service::add_folder(&db.conn, &params.path)
+        .await
+        .map_err(AppCommandError::from)?;
+    Ok(Json(entry))
+}
+
+// TODO: Add remaining folder handlers (git operations, file operations, etc.)
+// These will be added incrementally as needed.