feat(M2): FR-E6 链接气泡+图片入库——LinkBubbleMenu(编辑/移除href)；ImageView 节点视图(相对路径转 vaultasset:// 协议展示)；assetPickImage/assetWrite IPC + .attachments 入库；剪贴板粘贴图片入库；工具栏 链接/图片/网图 按钮；CSP 放行 vaultasset:；editor-link-image E2E 3 项

apps/desktop/src/main/ipc/handlers.ts

@@ -39,6 +39,11 @@ export function registerIpc(vault: VaultService) {
     return fs2().importFiles(sources, p.destDir);
   });
 
+  // FR-E6：图片入库
+  ipcMain.handle(IPC.assetPickImage, async () => vault.pickImage());
+  ipcMain.handle(IPC.assetWrite, async (_e, p: { name: string; dataBase64: string }) =>
+    fs2().writeAsset(p.name, p.dataBase64));
+
   ipcMain.handle(IPC.docRead, async (_e, p: { path: string }) => fs2().readDoc(p.path));
   ipcMain.handle(IPC.docWrite, async (_e, p: { path: string; meta: any; body: string }) =>
     fs2().writeDoc({ path: p.path, meta: p.meta, body: p.body }));