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-core/Cargo.toml

@@ -0,0 +1,11 @@
+[package]
+name = "df-core"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
+serde = { workspace = true }
+serde_json = { workspace = true }
+thiserror = { workspace = true }
+chrono = { workspace = true }
+uuid = { workspace = true }

crates/df-core/src/error.rs

@@ -0,0 +1,49 @@
+//! 统一错误类型定义
+
+use thiserror::Error;
+
+/// 统一错误类型
+#[derive(Debug, Error)]
+pub enum Error {
+    #[error("未找到: {0}")]
+    NotFound(String),
+
+    #[error("已存在: {0}")]
+    AlreadyExists(String),
+
+    #[error("验证失败: {0}")]
+    Validation(String),
+
+    #[error("状态错误: 当前状态 {current}, 期望 {expected}")]
+    InvalidState {
+        current: String,
+        expected: String,
+    },
+
+    #[error("工作流错误: {0}")]
+    Workflow(String),
+
+    #[error("执行错误: {0}")]
+    Execution(String),
+
+    #[error("存储错误: {0}")]
+    Storage(String),
+
+    #[error("插件错误: {0}")]
+    Plugin(String),
+
+    #[error("AI 提供者错误: {0}")]
+    AiProvider(String),
+
+    #[error("配置错误: {0}")]
+    Config(String),
+
+    #[error("IO 错误: {0}")]
+    Io(#[from] std::io::Error),
+
+    #[error("序列化错误: {0}")]
+    Serialization(#[from] serde_json::Error),
+}
+
+/// 统一 Result 别名
+pub type Result<T> = std::result::Result<T, Error>;

crates/df-core/src/events.rs

@@ -0,0 +1,74 @@
+//! 工作流事件定义
+
+use serde::{Deserialize, Serialize};
+
+use crate::types::NodeId;
+
+/// 人工审批响应
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct HumanApprovalResponse {
+    pub execution_id: String,
+    pub node_id: NodeId,
+    pub decision: String,
+    pub comment: Option<String>,
+}
+
+/// 工作流事件
+#[derive(Debug, Clone, Serialize, Deserialize)]
+#[serde(tag = "type", rename_all = "snake_case")]
+pub enum WorkflowEvent {
+    /// 节点开始执行
+    NodeStarted {
+        node_id: NodeId,
+    },
+    /// 节点执行进度更新
+    NodeProgress {
+        node_id: NodeId,
+        progress: f32,
+        message: String,
+    },
+    /// 节点产生输出
+    NodeOutput {
+        node_id: NodeId,
+        output: String,
+    },
+    /// 节点执行完成
+    NodeCompleted {
+        node_id: NodeId,
+        duration_ms: u64,
+    },
+    /// 节点执行失败
+    NodeFailed {
+        node_id: NodeId,
+        error: String,
+    },
+    /// 工作流暂停（等待外部输入）
+    WorkflowPaused {
+        reason: String,
+        waiting_node: NodeId,
+    },
+    /// 工作流执行完成
+    WorkflowCompleted {
+        total_duration_ms: u64,
+    },
+    /// 工作流执行失败
+    WorkflowFailed {
+        error: String,
+        failed_node: NodeId,
+    },
+    /// 人工审批请求
+    HumanApprovalRequest {
+        execution_id: String,
+        node_id: NodeId,
+        title: String,
+        description: String,
+        options: Vec<String>,
+    },
+    /// 人工审批响应
+    HumanApprovalResponse {
+        execution_id: String,
+        node_id: NodeId,
+        decision: String,
+        comment: Option<String>,
+    },
+}

crates/df-core/src/lib.rs

@@ -0,0 +1,5 @@
+//! df-core: 核心类型定义，所有 crate 的基础依赖
+
+pub mod error;
+pub mod events;
+pub mod types;

crates/df-core/src/types.rs

@@ -0,0 +1,301 @@
+//! 核心类型定义：ID 别名、状态枚举、优先级等
+
+use serde::{Deserialize, Serialize};
+
+// ============================================================
+// ID 类型别名
+// ============================================================
+
+/// 想法 ID
+pub type IdeaId = String;
+/// 项目 ID
+pub type ProjectId = String;
+/// 任务 ID
+pub type TaskId = String;
+/// 工作流 ID
+pub type WorkflowId = String;
+/// 节点 ID
+pub type NodeId = String;
+/// 发布 ID
+pub type ReleaseId = String;
+/// 分支 ID
+pub type BranchId = String;
+/// 插件 ID
+pub type PluginId = String;
+/// 执行 ID
+pub type ExecutionId = String;
+/// 决策 ID
+pub type DecisionId = String;
+
+// ============================================================
+// 状态枚举
+// ============================================================
+
+/// 想法状态
+#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
+#[serde(rename_all = "snake_case")]
+pub enum IdeaStatus {
+    /// 草稿
+    Draft,
+    /// 待评估
+    PendingReview,
+    /// 已批准
+    Approved,
+    /// 已拒绝
+    Rejected,
+    /// 已转为项目
+    Promoted,
+    /// 已归档
+    Archived,
+}
+
+impl IdeaStatus {
+    /// 返回数据库存储用的小写字符串
+    pub fn as_str(&self) -> &'static str {
+        match self {
+            IdeaStatus::Draft => "draft",
+            IdeaStatus::PendingReview => "pending_review",
+            IdeaStatus::Approved => "approved",
+            IdeaStatus::Rejected => "rejected",
+            IdeaStatus::Promoted => "promoted",
+            IdeaStatus::Archived => "archived",
+        }
+    }
+}
+
+impl Default for IdeaStatus {
+    fn default() -> Self {
+        IdeaStatus::Draft
+    }
+}
+
+/// 项目状态
+#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
+#[serde(rename_all = "snake_case")]
+pub enum ProjectStatus {
+    /// 规划中
+    Planning,
+    /// 开发中
+    InProgress,
+    /// 测试中
+    Testing,
+    /// 发布中
+    Releasing,
+    /// 已完成
+    Completed,
+    /// 已暂停
+    Paused,
+    /// 已取消
+    Cancelled,
+}
+
+impl ProjectStatus {
+    /// 返回数据库存储用的小写字符串
+    pub fn as_str(&self) -> &'static str {
+        match self {
+            ProjectStatus::Planning => "planning",
+            ProjectStatus::InProgress => "in_progress",
+            ProjectStatus::Testing => "testing",
+            ProjectStatus::Releasing => "releasing",
+            ProjectStatus::Completed => "completed",
+            ProjectStatus::Paused => "paused",
+            ProjectStatus::Cancelled => "cancelled",
+        }
+    }
+}
+
+impl Default for ProjectStatus {
+    fn default() -> Self {
+        ProjectStatus::Planning
+    }
+}
+
+/// 任务状态
+#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
+#[serde(rename_all = "snake_case")]
+pub enum TaskStatus {
+    /// 待开始
+    Todo,
+    /// 进行中
+    InProgress,
+    /// 代码审查中
+    InReview,
+    /// 测试中
+    Testing,
+    /// 已完成
+    Done,
+    /// 已阻塞
+    Blocked,
+    /// 已取消
+    Cancelled,
+}
+
+impl TaskStatus {
+    /// 返回数据库存储用的小写字符串
+    pub fn as_str(&self) -> &'static str {
+        match self {
+            TaskStatus::Todo => "todo",
+            TaskStatus::InProgress => "in_progress",
+            TaskStatus::InReview => "in_review",
+            TaskStatus::Testing => "testing",
+            TaskStatus::Done => "done",
+            TaskStatus::Blocked => "blocked",
+            TaskStatus::Cancelled => "cancelled",
+        }
+    }
+}
+
+impl Default for TaskStatus {
+    fn default() -> Self {
+        TaskStatus::Todo
+    }
+}
+
+/// 工作流状态
+#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
+#[serde(rename_all = "snake_case")]
+pub enum WorkflowStatus {
+    /// 待执行
+    Pending,
+    /// 运行中
+    Running,
+    /// 已暂停（等待人工输入等）
+    Paused,
+    /// 已完成
+    Completed,
+    /// 已失败
+    Failed,
+    /// 已取消
+    Cancelled,
+}
+
+impl WorkflowStatus {
+    /// 返回数据库存储用的小写字符串
+    pub fn as_str(&self) -> &'static str {
+        match self {
+            WorkflowStatus::Pending => "pending",
+            WorkflowStatus::Running => "running",
+            WorkflowStatus::Paused => "paused",
+            WorkflowStatus::Completed => "completed",
+            WorkflowStatus::Failed => "failed",
+            WorkflowStatus::Cancelled => "cancelled",
+        }
+    }
+}
+
+impl Default for WorkflowStatus {
+    fn default() -> Self {
+        WorkflowStatus::Pending
+    }
+}
+
+/// 节点状态
+#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
+#[serde(rename_all = "snake_case")]
+pub enum NodeStatus {
+    /// 待执行
+    Pending,
+    /// 运行中
+    Running,
+    /// 已完成
+    Completed,
+    /// 已失败
+    Failed,
+    /// 已跳过
+    Skipped,
+    /// 等待中（如等待人工操作）
+    Waiting,
+    /// 已取消
+    Cancelled,
+}
+
+impl NodeStatus {
+    /// 返回数据库存储用的小写字符串
+    pub fn as_str(&self) -> &'static str {
+        match self {
+            NodeStatus::Pending => "pending",
+            NodeStatus::Running => "running",
+            NodeStatus::Completed => "completed",
+            NodeStatus::Failed => "failed",
+            NodeStatus::Skipped => "skipped",
+            NodeStatus::Waiting => "waiting",
+            NodeStatus::Cancelled => "cancelled",
+        }
+    }
+}
+
+impl Default for NodeStatus {
+    fn default() -> Self {
+        NodeStatus::Pending
+    }
+}
+
+/// 分支状态
+#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
+#[serde(rename_all = "snake_case")]
+pub enum BranchStatus {
+    /// 活跃中
+    Active,
+    /// 已合并
+    Merged,
+    /// 已废弃
+    Abandoned,
+}
+
+impl BranchStatus {
+    /// 返回数据库存储用的小写字符串
+    pub fn as_str(&self) -> &'static str {
+        match self {
+            BranchStatus::Active => "active",
+            BranchStatus::Merged => "merged",
+            BranchStatus::Abandoned => "abandoned",
+        }
+    }
+}
+
+impl Default for BranchStatus {
+    fn default() -> Self {
+        BranchStatus::Active
+    }
+}
+
+/// 优先级
+#[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Serialize, Deserialize)]
+#[serde(rename_all = "snake_case")]
+pub enum Priority {
+    /// 低
+    Low = 0,
+    /// 中
+    Medium = 1,
+    /// 高
+    High = 2,
+    /// 紧急
+    Critical = 3,
+}
+
+impl Priority {
+    /// 返回数据库存储用的小写字符串
+    pub fn as_str(&self) -> &'static str {
+        match self {
+            Priority::Low => "low",
+            Priority::Medium => "medium",
+            Priority::High => "high",
+            Priority::Critical => "critical",
+        }
+    }
+}
+
+impl Default for Priority {
+    fn default() -> Self {
+        Priority::Medium
+    }
+}
+
+// ============================================================
+// 辅助函数
+// ============================================================
+
+/// 生成新的 UUID v4 字符串
+pub fn new_id() -> String {
+    uuid::Uuid::new_v4().to_string()
+}