feat(agent): 接通 plan 自动放行（autoApprovePlan）+ 项目配置可写

之前 auto_approve_plan/auto_approve_exec/checks 列与 Project 类型已存在，但
PatchProjectInput 不含它们 → 无法启用（dead config）。本次接通：
- PatchProjectInput + patchProject 支持 autoApprovePlan/autoApproveExec/checks
- API PATCH /projects 透传三字段
- ingest decompose-result：auto-approved + autoApprovePlan + 全 easy + 子任务≤5
  → store.decide(accept) 跳过 plan_review 直达 decomposed（默认关）

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

design/maestro-ds/components/forms/Textarea.jsx

@@ -0,0 +1,17 @@
+import { ensureFieldCss } from './Input.jsx';
+
+export function Textarea({ label, required, placeholder, value, defaultValue, onChange, minHeight = 72, danger, style }) {
+  ensureFieldCss();
+  const ctrl = (
+    <textarea className="m-input" placeholder={placeholder} value={value} defaultValue={defaultValue}
+      style={{ resize: 'vertical', minHeight, width: '100%', ...(danger ? { borderColor: 'var(--red-dim)' } : {}), ...style }}
+      onChange={onChange ? (e) => onChange(e.target.value) : undefined} readOnly={value !== undefined && !onChange} />
+  );
+  if (!label) return ctrl;
+  return (
+    <label className="m-label" style={{ width: '100%' }}>
+      <span>{label}{required ? <span className="m-req"> *</span> : null}</span>
+      {ctrl}
+    </label>
+  );
+}