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/tauri.conf.json

@@ -0,0 +1,37 @@
+{
+  "productName": "devflow",
+  "version": "0.1.0",
+  "identifier": "top.1216.devflow",
+  "build": {
+    "beforeDevCommand": "bun dev",
+    "devUrl": "http://localhost:1420",
+    "beforeBuildCommand": "bun run build",
+    "frontendDist": "../dist"
+  },
+  "app": {
+    "windows": [
+      {
+        "title": "DevFlow",
+        "width": 1024,
+        "height": 768,
+        "resizable": true,
+        "fullscreen": false,
+        "devtools": true
+      }
+    ],
+    "security": {
+      "csp": null
+    }
+  },
+  "bundle": {
+    "active": true,
+    "targets": "all",
+    "icon": [
+      "icons/32x32.png",
+      "icons/128x128.png",
+      "icons/128x128@2x.png",
+      "icons/icon.icns",
+      "icons/icon.ico"
+    ]
+  }
+}