Gate project override settings to owners and admins

Why: S9 acceptance finding 3 — the project settings modal exposed the
host override settings (including the model/key group, masked) to plain
project members; the duties data plane was already permission-enforced,
but the host settings surface had no gate.

Evidence: vitest 34 files / 293 tests pass with the change; tsc reports
no errors in the modified file. Ruling per the acceptance plan P1-B:
the modal entry stays (granted duty managers need the RDM tabs), while
the host override settings group renders only for the project owner or
a system admin; RDM tabs keep their own fail-closed gating.

Impact: ProjectSettingsModal project tab renders an explanatory empty
state for non-privileged viewers; members/duties/matrix tabs unchanged.
Refs: S9 acceptance report P1-B

src/api.ts

@@ -15,6 +15,16 @@ const BASE = ''
  *  自身命令面 fail-closed。 */
 export interface AdminZoneSection { id: string; title: string; icon?: string; desc?: string; order?: number }
 
+export interface ExecEnvView {
+  configured: boolean
+  root?: string
+  python?: string
+  base?: string
+  layers?: string[]
+  requests?: { id: string; conversationId: string; owner: string; spec: string; reason: string; status: string; layerId: string; detail: string; approver: string }[]
+  bindings?: { conversationId: string; baseId: string; extensions: string[] | null; isolated: string }[]
+}
+
 async function checked(res: Response): Promise<Response> {
   if (!res.ok) {
     const text = await res.text()
@@ -79,6 +89,17 @@ export const api = {
   adminIssueLoginKey: (owner: string, ttlMinutes?: number) => auth.fetch(`${BASE}/api/admin/users/${encodeURIComponent(owner)}/login-keys`, { method: 'POST', headers: { 'Content-Type': 'application/json' }, body: JSON.stringify({ purpose: 'recover', ...(ttlMinutes ? { ttlMinutes } : {}) }) }).then(r => json<{ id: string; owner: string; purpose: string; status: string; expiresAt: string; key: string }>(r)),
   adminListLoginKeys: (owner: string) => auth.fetch(`${BASE}/api/admin/users/${encodeURIComponent(owner)}/login-keys`).then(r => json<{ keys: { id: string; owner: string; purpose: string; status: string; expiresAt: string; createdAt: string; createdBy?: string }[] }>(r)).then(d => d.keys ?? []),
   adminRevokeLoginKey: (owner: string, id: string) => auth.fetch(`${BASE}/api/admin/users/${encodeURIComponent(owner)}/login-keys/${encodeURIComponent(id)}`, { method: 'DELETE' }).then(r => json<{ ok: boolean }>(r)),
+  adminExecEnv: () => auth.fetch(`${BASE}/api/admin/exec-env`).then(r => json<ExecEnvView>(r)),
+  adminExecEnvDecision: (id: string, allow: boolean, isolate: boolean) => auth.fetch(`${BASE}/api/admin/exec-env/requests/${encodeURIComponent(id)}/decision`, { method: 'POST', headers: { 'Content-Type': 'application/json' }, body: JSON.stringify({ allow, isolate }) }).then(r => json<{ status: string; detail?: string; layerId?: string }>(r)),
+  adminExecEnvRebase: () => auth.fetch(`${BASE}/api/admin/exec-env/rebase`, { method: 'POST' }).then(r => json<{ base: string }>(r)),
+  adminExecEnvGC: () => auth.fetch(`${BASE}/api/admin/exec-env/gc`, { method: 'POST' }).then(r => json<{ removed: string[] | null }>(r)),
+  adminExecEnvWheel: (file: File, conversationId: string, reason: string) => {
+    const body = new FormData()
+    body.set('wheel', file)
+    body.set('conversationId', conversationId)
+    body.set('reason', reason)
+    return auth.fetch(`${BASE}/api/admin/exec-env/wheels`, { method: 'POST', body }).then(r => json<{ file: string; outcome: { status: string; requestId?: string; detail?: string } }>(r))
+  },
   createConversation: (projectId: string, title?: string) => auth.fetch(`${BASE}/api/projects/${projectId}/conversations`, { method: 'POST', headers: { 'Content-Type': 'application/json' }, body: JSON.stringify({ title: title ?? '' }) }).then(r => json<Conversation>(r)),
   deleteConversation: (id: string) => auth.fetch(`${BASE}/api/conversations/${id}`, { method: 'DELETE' }),
   setConversationProfile: (id: string, profileId: string) => auth.fetch(`${BASE}/api/conversations/${id}`, { method: 'PATCH', headers: { 'Content-Type': 'application/json' }, body: JSON.stringify({ profileId }) }).then(r => json<Conversation>(r)),

src/components/AdminZone.tsx

@@ -8,6 +8,7 @@ import { useState } from 'react'
 import { store, useStore } from '../store'
 import { EmptyState, Icon, type IconName } from '@ui'
 import { UsersPanel, ProfilesSection, PluginsSection, PluginWorkspacesPanel, SystemSettingsPanel } from './adminSections'
+import { ExecEnvPanel } from './ExecEnvPanel'
 import { RdmAuditWorkspace } from './RdmAuditWorkspace'
 import { RdmRolesPanel } from './adminRdmSections'
 import type { AdminZoneSection } from '../api'
@@ -34,6 +35,7 @@ const SECTIONS: AdminSectionDef[] = [
   // P2 受管：模型/密钥/Tavily/遥测/运行基础设施的唯一写入面（Backend PR 188 系统设置 API）。
   { key: 'system-settings', label: '模型与服务配置', icon: 'settings', desc: '系统受管项：模型、密钥、Tavily、遥测与运行基础设施（仅管理员）', render: () => <SystemSettingsPanel /> },
   { key: 'plugins', label: '插件管理', icon: 'puzzle', desc: '已装载插件清单与热重载（装卸不影响核心）', render: () => <PluginsSection /> },
+  { key: 'python-env', label: 'Python 环境', icon: 'package', desc: '基础层、扩展申请、回收和 wheel 上传（仅管理员）', render: () => <ExecEnvPanel /> },
   { key: 'workspaces', label: '插件工作区', icon: 'grid', desc: '插件声明面板与服务端声明工作区', render: () => <PluginWorkspacesPanel /> },
 ]
 

src/components/ExecEnvPanel.tsx

@@ -0,0 +1,98 @@
+import { useEffect, useState } from 'react'
+import { api, type ExecEnvView } from '../api'
+import { Btn, EmptyState, Icon, SettingRow, SettingsGroup } from '@ui'
+
+export function ExecEnvPanel() {
+  const [view, setView] = useState<ExecEnvView | null>(null)
+  const [err, setErr] = useState('')
+  const [notice, setNotice] = useState('')
+  const [busy, setBusy] = useState(false)
+  const [conv, setConv] = useState('')
+  const [reason, setReason] = useState('')
+  const [wheel, setWheel] = useState<File | null>(null)
+
+  const refresh = async () => {
+    try { setView(await api.adminExecEnv()) } catch (e) { setErr(String(e)) }
+  }
+  useEffect(() => { refresh() }, [])
+
+  const run = async (work: () => Promise<string>) => {
+    setErr(''); setNotice(''); setBusy(true)
+    try { setNotice(await work()); await refresh() } catch (e) { setErr(String(e)) } finally { setBusy(false) }
+  }
+
+  if (!view) return <EmptyState icon="package">加载 Python 环境…</EmptyState>
+  if (!view.configured) return <EmptyState icon="package">这台服务没有配置分层 Python 环境根</EmptyState>
+
+  return (
+    <div>
+      <SettingsGroup title="当前环境">
+        <SettingRow label="环境根" desc={view.root || '未设置'}><span /></SettingRow>
+        <SettingRow label="解释器" desc={view.python || '尚未安装托管解释器'}><span /></SettingRow>
+        <SettingRow label="基础层" desc={view.base || '尚未建立'}><span /></SettingRow>
+        <SettingRow label="层目录" desc={(view.layers ?? []).join('、') || '无'}>
+          <Btn variant="ghost" icon="undo" disabled={busy} onClick={() => run(async () => {
+            const out = await api.adminExecEnvRebase()
+            return `基础层已切换到 ${out.base}。已有会话仍用原来的绑定。`
+          })}>重建基础层</Btn>
+        </SettingRow>
+      </SettingsGroup>
+      <SettingsGroup title="申请">
+        {(view.requests ?? []).length === 0 && <EmptyState icon="inbox">还没有扩展包申请</EmptyState>}
+        {(view.requests ?? []).map(req => (
+          <SettingRow key={req.id} label={req.spec || req.id} desc={`${req.status} · ${req.conversationId} · ${req.detail}`}>
+            {req.status === 'pending_approval' && (
+              <span className="ad-row">
+                <Btn variant="primary" icon="check" disabled={busy} onClick={() => run(async () => {
+                  const out = await api.adminExecEnvDecision(req.id, true, false)
+                  return out.detail || out.status
+                })}>批准</Btn>
+                <Btn variant="ghost" disabled={busy} onClick={() => run(async () => {
+                  const out = await api.adminExecEnvDecision(req.id, true, true)
+                  return out.detail || '已用隔离层'
+                })}>隔离层</Btn>
+                <Btn variant="ghost" icon="x" disabled={busy} onClick={() => run(async () => {
+                  const out = await api.adminExecEnvDecision(req.id, false, false)
+                  return out.detail || '已拒绝'
+                })}>拒绝</Btn>
+              </span>
+            )}
+          </SettingRow>
+        ))}
+      </SettingsGroup>
+      <SettingsGroup title="会话绑定">
+        {(view.bindings ?? []).map(b => (
+          <SettingRow key={b.conversationId} label={b.conversationId} desc={b.isolated ? `隔离 ${b.isolated}` : (b.extensions ?? []).join('、') || '只用基础层'}>
+            <span />
+          </SettingRow>
+        ))}
+        <SettingRow label="回收" desc="删掉 7 天内没有会话引用、也不是当前基础层的目录">
+          <Btn variant="ghost" icon="trash" disabled={busy} onClick={() => run(async () => {
+            const out = await api.adminExecEnvGC()
+            const n = out.removed?.length ?? 0
+            return n === 0 ? '没有可回收的层' : `已回收 ${n} 层`
+          })}>回收未引用层</Btn>
+        </SettingRow>
+      </SettingsGroup>
+      <SettingsGroup title="上传 wheel">
+        <SettingRow label="会话" desc="这个 wheel 只挂到指定会话，并进入审批">
+          <input className="lg-input" value={conv} onChange={e => setConv(e.target.value)} placeholder="会话 ID" />
+        </SettingRow>
+        <SettingRow label="理由" desc="写给审批记录">
+          <input className="lg-input" value={reason} onChange={e => setReason(e.target.value)} />
+        </SettingRow>
+        <SettingRow label="文件" desc="只接受预编译 wheel，不执行里面的脚本">
+          <input type="file" accept=".whl" onChange={e => setWheel(e.target.files?.[0] ?? null)} />
+        </SettingRow>
+        <div className="ad-row">
+          <Btn variant="primary" icon="download" disabled={busy || !wheel || !conv.trim()} onClick={() => run(async () => {
+            const out = await api.adminExecEnvWheel(wheel as File, conv.trim(), reason.trim())
+            return `${out.file}：${out.outcome.status}`
+          })}>提交审批</Btn>
+        </div>
+      </SettingsGroup>
+      {notice && <div className="ad-notice"><Icon name="check" size={14} />{notice}</div>}
+      {err && <div className="lg-err"><Icon name="alert" size={14} />{err}</div>}
+    </div>
+  )
+}

src/components/ProjectSettingsModal.tsx

@@ -19,6 +19,11 @@ export function ProjectSettingsModal() {
   const rdmDocReviewAvailable = useStore(s => s.rdmDocReviewAvailable)
   const rdmPermMatrixAvailable = useStore(s => s.rdmPermMatrixAvailable)
   const owner = useStore(s => s.me?.owner)
+  const isAdmin = useStore(s => s.me?.isAdmin ?? false)
+  // P1-B 裁定：宿主覆盖设置（含模型与密钥）仅项目负责人/系统管理员可查看与修改；
+  // RDM 页签（成员/文档职责/项目权限）不在此列——数据面由 RDM 权限自行收敛，
+  // 授权的职责管理者仍可进入。
+  const projectPrivileged = !!project && (project.owner === owner || isAdmin)
   const [tab, setTab] = useState('project')
   const [schema, setSchema] = useState<SettingDesc[]>([])
   const [draft, setDraft] = useState<Record<string, any>>({})
@@ -85,6 +90,8 @@ export function ProjectSettingsModal() {
         </>}
         {tab !== 'members' && tab !== 'duties' && tab !== 'matrix' && !loaded ? (
           <EmptyState icon="settings">{error || '加载中…'}</EmptyState>
+        ) : tab !== 'members' && tab !== 'duties' && tab !== 'matrix' && !projectPrivileged ? (
+          <EmptyState icon="settings">项目覆盖设置（含模型与密钥）仅项目负责人或系统管理员可查看与修改。</EmptyState>
         ) : tab !== 'members' && tab !== 'duties' && tab !== 'matrix' ? (
           <>
             <div className="empty-note" style={{ marginBottom: 10 }}>