wip: 主题系统与设置面板改动 checkpoint

apps/desktop/src/main/ipc.ts

@@ -147,6 +147,11 @@ export function registerIpc(): AgentService {
     return pass(() => service.setSystemPrompt(text))
   })
 
+  ipcMain.handle('settings:setTheme', (_event, id: unknown) => {
+    if (typeof id !== 'string' || !id.trim()) throw new Error('invalid theme id')
+    service.setThemeColor(id.trim())
+  })
+
   // ---- 工作区 ----
   ipcMain.handle('workspaces:list', () =>
     service.listWorkspaces().catch((err: unknown) => {

apps/desktop/src/main/pi/agent-service.ts

@@ -89,7 +89,8 @@ export class AgentService {
           : undefined,
         // 历史版本存过 autoEdit/plan，统一收敛回 confirm
         permissionMode:
-          raw.permissionMode === 'full' ? 'full' : 'confirm'
+          raw.permissionMode === 'full' ? 'full' : 'confirm',
+        themeColor: typeof raw.themeColor === 'string' ? raw.themeColor : undefined
       }
     } catch {
       this.settings = { systemPrompt: '', permissionMode: this.permissionMode }
@@ -649,13 +650,14 @@ export class AgentService {
 
   async listSessions(): Promise<SessionMeta[]> {
     const infos = await SessionManager.list(this.cwd)
+    // 空会话（一条消息都没发过）不上列表：第一句发出之后才在侧栏可见
     const metas = infos
+      .filter((info) => info.messageCount > 0)
       .sort((a, b) => b.modified.getTime() - a.modified.getTime())
       .map((info) => toSessionMeta(info))
-    // 新会话在首条消息写入前没有 .jsonl 文件，SessionManager.list 扫不到；
-    // 把当前活跃会话兜底合并进列表，避免侧栏“新建后不出现”
+    // 未落盘的活跃会话兜底合并进列表（同样要求已有消息）
     const session = this.runtime?.session
-    if (session && !metas.some((m) => samePath(m.path, session.sessionFile ?? ''))) {
+    if (session && session.messages.length > 0 && !metas.some((m) => samePath(m.path, session.sessionFile ?? ''))) {
       const now = new Date().toISOString()
       metas.unshift({
         id: session.sessionId,
@@ -876,6 +878,12 @@ export class AgentService {
     }
   }
 
+  /** 主题色偏好（纯外观，仅持久化；渲染层负责应用） */
+  setThemeColor(id: string): void {
+    this.settings = { ...this.settings, themeColor: id }
+    this.saveSettings()
+  }
+
   private async rebuildRuntime(): Promise<void> {
     const old = this.runtime
     this.runtime = null