feat(settings): 用户级全局默认配置（per-user 落库 + 新建项目套默认）

新增 settings 表（user_id PK，data JSON，单本地用户 'local'）+ store.getSettings/putSettings
（内置默认=核心策略子集）+ GET/PUT /api/settings 端点；POST /api/projects 创建时以用户
默认填充未显式传的字段（body 优先，自动放行/预算经 patchProject 套用）。前端弹框另提交。

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/store/index.ts

@@ -1,5 +1,5 @@
 export { Store, StoreError } from './store.js';
-export type { CreateProjectInput, CreateTaskInput, PatchProjectInput, PatchTaskInput, ActiveRun } from './store.js';
+export type { CreateProjectInput, CreateTaskInput, PatchProjectInput, PatchTaskInput, ActiveRun, UserSettings } from './store.js';
 export type { Metrics, DurationStats, RunStats, ReviewStats, RetryStats, ModelUsage } from '../model/metrics.js';
 export { openDb } from './db.js';
 export type { DB } from './db.js';

src/store/schema.sql

@@ -94,3 +94,10 @@ CREATE TABLE IF NOT EXISTS events (
   at         TEXT NOT NULL
 );
 CREATE INDEX IF NOT EXISTS idx_events_project ON events(project_id, at);
+
+-- 用户级配置（per-user）：新建项目默认值的单一来源。单本地用户 'local'，多用户前向兼容。
+CREATE TABLE IF NOT EXISTS settings (
+  user_id    TEXT PRIMARY KEY,
+  data       TEXT NOT NULL DEFAULT '{}',   -- 核心策略子集 JSON（autonomy/concurrency/max_retries/timeout_ms/auto_approve_*/budget_*/model）
+  updated_at TEXT NOT NULL
+);

src/store/store.ts

@@ -18,6 +18,24 @@ import {
 } from '../model/status.js';
 
 const now = (): string => new Date().toISOString();
+
+/** 用户级全局默认配置（新建项目默认值的单一来源）。核心策略子集。 */
+export interface UserSettings {
+  autonomy: Autonomy;
+  concurrency: number;
+  maxRetries: number;
+  timeoutMs: number;
+  autoApprovePlan: boolean;
+  autoApproveExec: boolean;
+  budgetUsd: number | null;
+  budgetPeriod: 'day' | 'month';
+  model: string | null;
+}
+const SETTINGS_DEFAULT: UserSettings = {
+  autonomy: 'manual', concurrency: 1, maxRetries: 2, timeoutMs: 1_800_000,
+  autoApprovePlan: false, autoApproveExec: false,
+  budgetUsd: null, budgetPeriod: 'month', model: null,
+};
 const id = (prefix: string): string => `${prefix}_${nanoid(12)}`;
 
 /** 预算周期起点（UTC）：day=今日零点 / month=当月 1 号零点。与存储的 ISO 时间戳同基准比较。 */
@@ -172,6 +190,29 @@ export class Store {
     return rowToProject(row);
   }
 
+  // ---------- Settings（用户级全局默认配置）----------
+  /** 取用户配置（无行→内置默认；与默认 merge 保证字段齐全）。 */
+  getSettings(userId = 'local'): UserSettings {
+    const row = this.db.prepare(`SELECT data FROM settings WHERE user_id = ?`).get(userId) as { data: string } | undefined;
+    let saved: Partial<UserSettings> = {};
+    if (row) { try { saved = JSON.parse(row.data) as Partial<UserSettings>; } catch { saved = {}; } }
+    return { ...SETTINGS_DEFAULT, ...saved };
+  }
+
+  /** 写用户配置（upsert，仅白名单字段，缺省字段保持原值/默认）。 */
+  putSettings(data: Partial<UserSettings>, userId = 'local'): UserSettings {
+    const merged = { ...this.getSettings(userId), ...data };
+    const clean = {} as UserSettings;
+    for (const k of Object.keys(SETTINGS_DEFAULT) as (keyof UserSettings)[]) {
+      (clean[k] as unknown) = merged[k];
+    }
+    this.db.prepare(
+      `INSERT INTO settings (user_id, data, updated_at) VALUES (?,?,?)
+       ON CONFLICT(user_id) DO UPDATE SET data = excluded.data, updated_at = excluded.updated_at`,
+    ).run(userId, JSON.stringify(clean), now());
+    return clean;
+  }
+
   listProjects(): Project[] {
     const rows = this.db.prepare(`SELECT * FROM projects ORDER BY sort_order, created_at`).all() as ProjectRow[];
     return rows.map(rowToProject);