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。

crates/df-storage/src/models.rs

@@ -0,0 +1,170 @@
+//! 数据模型定义 — 与数据库表对应的 Rust 结构体
+
+use serde::{Deserialize, Serialize};
+
+// ============================================================
+// 想法相关模型
+// ============================================================
+
+/// 想法记录
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct IdeaRecord {
+    pub id: String,
+    pub title: String,
+    pub description: String,
+    pub status: String,
+    pub priority: i32,
+    pub score: Option<f64>,
+    pub tags: Option<String>, // JSON 数组
+    pub source: Option<String>,
+    pub promoted_to: Option<String>,   // 晋升后的 project_id
+    pub ai_analysis: Option<String>,   // AI 分析结果 JSON
+    pub scores: Option<String>,        // 多维评分 JSON (feasibility/impact/urgency/overall)
+    pub created_at: String,
+    pub updated_at: String,
+}
+
+// ============================================================
+// 项目相关模型
+// ============================================================
+
+/// 项目记录
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct ProjectRecord {
+    pub id: String,
+    pub name: String,
+    pub description: String,
+    pub status: String,
+    pub idea_id: Option<String>,
+    pub created_at: String,
+    pub updated_at: String,
+}
+
+// ============================================================
+// 任务相关模型
+// ============================================================
+
+/// 任务记录
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct TaskRecord {
+    pub id: String,
+    pub project_id: String,
+    pub title: String,
+    pub description: String,
+    pub status: String,
+    pub priority: i32,
+    pub branch_name: Option<String>,
+    pub assignee: Option<String>,
+    pub workflow_def_id: Option<String>, // 关联的工作流定义 ID
+    pub base_branch: Option<String>,     // 基础分支
+    pub created_at: String,
+    pub updated_at: String,
+}
+
+/// 分支记录
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct BranchRecord {
+    pub id: String,
+    pub project_id: String,
+    pub task_id: Option<String>,
+    pub name: String,
+    pub base: String,
+    pub status: String,
+    pub created_at: String,
+    pub updated_at: String,
+    pub merged_at: Option<String>,
+}
+
+/// 发布记录
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct ReleaseRecord {
+    pub id: String,
+    pub project_id: String,
+    pub version: String,
+    pub status: String,
+    pub task_ids: String, // JSON 数组
+    pub changelog: Option<String>,
+    pub created_at: String,
+    pub released_at: Option<String>,
+}
+
+// ============================================================
+// 工作流相关模型
+// ============================================================
+
+/// 工作流执行记录
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct WorkflowRecord {
+    pub id: String,
+    pub name: String,
+    pub dag_json: String, // DAG 的 JSON 序列化
+    pub status: String,
+    pub triggered_by: Option<String>,
+    pub project_id: Option<String>, // 关联项目 ID
+    pub task_id: Option<String>,    // 关联任务 ID
+    pub created_at: String,
+    pub completed_at: Option<String>,
+}
+
+/// 节点执行记录
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct NodeExecutionRecord {
+    pub id: String,
+    pub workflow_id: String,
+    pub node_id: String,
+    pub node_type: String,
+    pub status: String,
+    pub input_json: Option<String>,
+    pub output_json: Option<String>,
+    pub error_message: Option<String>,
+    pub started_at: Option<String>,
+    pub completed_at: Option<String>,
+}
+
+// ============================================================
+// AI 相关模型 (V3)
+// ============================================================
+
+/// AI 提供商配置记录
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct AiProviderRecord {
+    pub id: String,
+    pub name: String,
+    pub provider_type: String,
+    pub api_key: String,
+    pub base_url: String,
+    pub default_model: String,
+    pub models: Option<String>,       // JSON array of model names
+    pub is_default: bool,
+    pub config: Option<String>,       // JSON extra config
+    pub created_at: String,
+    pub updated_at: String,
+}
+
+/// AI 对话记录
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct AiConversationRecord {
+    pub id: String,
+    pub title: Option<String>,
+    pub messages: String,             // JSON array of ChatMessage
+    pub provider_id: Option<String>,
+    pub model: Option<String>,
+    pub created_at: String,
+    pub updated_at: String,
+}
+
+/// AI 工具执行审计记录
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct AiToolExecutionRecord {
+    pub id: String,
+    pub conversation_id: Option<String>,
+    pub tool_call_id: String,
+    pub tool_name: String,
+    pub arguments: String,
+    pub result: Option<String>,
+    pub status: String,               // pending/approved/rejected/executing/completed/failed
+    pub risk_level: String,           // low/medium/high
+    pub requested_at: String,
+    pub executed_at: Option<String>,
+    pub decided_by: Option<String>,   // human/auto
+}