新增: 初始化 DevFlow 项目仓库

Tauri 2 + Vue 3 + Vite 6 桌面应用，Rust workspace 含 13 个 crate
(df-ai / df-storage / df-workflow / df-core / df-execute 等)。
核心能力：AI 聊天 agentic 循环(工具调用+人工审批)、工作流引擎、
任务/想法/项目/阶段管理、可追溯性，及配套前端组件。

src-tauri/src/commands/project.rs

@@ -0,0 +1,84 @@
+//! 项目相关命令
+
+use serde::Deserialize;
+use tauri::State;
+
+use df_core::types::new_id;
+use df_storage::models::ProjectRecord;
+
+use crate::state::AppState;
+
+use super::now_millis;
+
+/// 创建项目入参
+#[derive(Debug, Deserialize)]
+pub struct CreateProjectInput {
+    pub name: String,
+    #[serde(default)]
+    pub description: String,
+    pub idea_id: Option<String>,
+}
+
+/// 列出全部项目
+#[tauri::command]
+pub async fn list_projects(state: State<'_, AppState>) -> Result<Vec<ProjectRecord>, String> {
+    state.projects.list_all().await.map_err(|e| e.to_string())
+}
+
+/// 创建项目，返回完整记录
+#[tauri::command]
+pub async fn create_project(
+    state: State<'_, AppState>,
+    input: CreateProjectInput,
+) -> Result<ProjectRecord, String> {
+    let now = now_millis();
+    let record = ProjectRecord {
+        id: new_id(),
+        name: input.name,
+        description: input.description,
+        status: "planning".to_string(),
+        idea_id: input.idea_id,
+        created_at: now.clone(),
+        updated_at: now,
+    };
+    state
+        .projects
+        .insert(record.clone())
+        .await
+        .map_err(|e| e.to_string())?;
+    Ok(record)
+}
+
+/// 按 ID 查询项目
+#[tauri::command]
+pub async fn get_project(
+    state: State<'_, AppState>,
+    id: String,
+) -> Result<Option<ProjectRecord>, String> {
+    state
+        .projects
+        .get_by_id(&id)
+        .await
+        .map_err(|e| e.to_string())
+}
+
+/// 更新项目单个字段（字段名走 df-storage 白名单校验）
+#[tauri::command]
+pub async fn update_project(
+    state: State<'_, AppState>,
+    id: String,
+    field: String,
+    value: String,
+) -> Result<bool, String> {
+    state
+        .projects
+        .update_field(&id, &field, &value)
+        .await
+        .map_err(|e| e.to_string())
+}
+
+/// 删除项目
+#[tauri::command]
+pub async fn delete_project(state: State<'_, AppState>, id: String) -> Result<bool, String> {
+    state.projects.delete(&id).await.map_err(|e| e.to_string())
+}