fix: 修复文件层级重构后的架构问题

- 恢复 IPC 类型声明 (src/electron-api.d.ts)，修复 31 个 TS2339 错误
- 修复构建断裂：vite.config.ts 改回 electron.vite.config.ts
- 修复 2 个 verbatimModuleSyntax type-import 报错
- 修正 .gitignore 构建产物路径 (electron-dist/ -> dist-electron/ + release/)
- 清理 55+ 处过时路径注释
- 更新 AGENTS.md 架构文档与 IPC 通道表
- 修正 docs/ROADMAP.md 过时引用

electron.vite.config.ts

@@ -0,0 +1,48 @@
+import { defineConfig, externalizeDepsPlugin } from 'electron-vite'
+import vue from '@vitejs/plugin-vue'
+import { resolve } from 'path'
+
+export default defineConfig({
+  main: {
+    plugins: [externalizeDepsPlugin()],
+    build: {
+      outDir: 'dist-electron',
+      rollupOptions: {
+        input: {
+          index: resolve(__dirname, 'electron/main.ts')
+        }
+      }
+    }
+  },
+  preload: {
+    plugins: [externalizeDepsPlugin()],
+    build: {
+      outDir: 'dist-electron',
+      rollupOptions: {
+        input: {
+          index: resolve(__dirname, 'electron/preload.ts')
+        }
+      }
+    }
+  },
+  renderer: {
+    root: 'src',
+    build: {
+      outDir: resolve(__dirname, 'dist-electron/renderer'),
+      rollupOptions: {
+        input: {
+          index: resolve(__dirname, 'src/index.html')
+        }
+      }
+    },
+    resolve: {
+      alias: {
+        '@renderer': resolve(__dirname, 'src')
+      }
+    },
+    plugins: [vue()],
+    server: {
+      port: 5173
+    }
+  }
+})