feat(tenancy): add Workspace multi-tenant foundation (#2353)

* Document multi-tenant workspace architecture

* Add OSS and commercial workspace boundaries

* docs: redesign multi-tenant workspace architecture

* feat(tenancy): implement workspace isolation

* docs(tenancy): record verification evidence

* docs(tenancy): revise single-instance SaaS topology

* docs(tenancy): refine architecture options

* docs: finalize cloud v2 multi-tenant decisions

* feat(tenancy): establish cloud isolation foundations

* feat(tenancy): harden shared cloud runtime boundaries

* docs(tenancy): record final isolation verification

* fix(tenancy): close isolation and permission gaps

* docs(tenancy): record final isolation verification

* feat(tenancy): connect cloud workspace control plane

* fix(build): install git for pinned SDK

* docs(cloud): update control plane verification

* chore: update multi-tenant SDK pin

* fix(cloud): skip legacy model sync during startup

* test(cloud): preserve minimal model manager fixtures

* fix(cloud): preserve authenticated account context

* fix(cloud): reuse authenticated account for user info

* feat(cloud): complete Workspace settings navigation

* test(web): cover Workspace dropdown menu

* feat(web): place workspace controls in sidebar

* refactor(web): streamline workspace controls

* style(web): format workspace layout test

* fix(cloud): surface runtime and workspace plan status

* fix(plugin): keep runtime identity stable across restarts

* fix(ui): widen and center workspace switcher

* fix(ui): hide roles from workspace switcher

* fix(ui): align workspace switcher with sidebar entries

* feat(workspace): add in-product collaboration and direct Cloud launch

* style: format collaboration changes

* fix(workspace): bind collaboration APIs to tenant UoW

* fix(cloud): preserve Core-owned collaboration state

* test(cloud): require Space identity for invite registration

* feat(cloud): complete secure invitation experience

* style(web): format invitation flows

* fix(cloud): recover box runtime without unscoped skill reload

* feat(oss): enforce invitation account and owner billing flows

* style: format OSS account service

* test(oss): cover invitation logout handoff

* fix(oss): resolve workspace owner in scoped session

* feat(cloud): harden multi-tenant runtime resources

* fix(cloud): bound runtime restart storms

* fix(cloud): eliminate periodic runtime CPU spikes

* fix(cloud): enforce instance capacity ceilings

* fix(cloud): scope public login capability discovery

* fix(cloud): bound tenant maintenance and monitoring work

* fix(runtime): bound tenant resource amplification

* fix(deps): pin green multi-tenant plugin SDK

* fix(cloud): handle unavailable skill capability

* fix(security): require authentication for image file endpoint (H-2)

- Changed /api/v1/files/image from AuthType.NONE to USER_TOKEN_OR_API_KEY
- Added Permission.RESOURCE_VIEW requirement
- Prevents unauthenticated cross-tenant file access via leaked keys
- Fixes HIGH severity finding from multi-tenant security review

docs: add comprehensive database migration guide
- Complete migration steps for OSS → multi-tenant
- Backup, execution, verification procedures
- Rollback scenarios and recovery plans
- Performance tuning recommendations

* test: add comprehensive cross-tenant isolation tests

Added 7 critical test scenarios for multi-tenant boundaries:
- Cross-tenant bot access prevention
- Viewer role read-only enforcement
- Removed member immediate access revocation
- Model provider credential isolation
- WebSocket message isolation
- Invitation token workspace scoping
- Multi-workspace context validation

These tests address P0-2 coverage gaps for:
- workspaces.py (membership & invitation flows)
- user.py (authentication & authorization)
- websocket_chat.py (real-time isolation)
- plugins.py (resource access control)

docs: finalize database migration guide

* fix(security): resolve M-1, M-2, M-3 security findings

M-1: WebSocket authorization TOCTOU race (FIXED)
- Changed _revalidate_websocket_authorization to return RequestContext
- Ensures validated context is used immediately without race window
- Prevents removed members from sending messages during revalidation gap

M-2: Model Manager cache workspace isolation (VERIFIED)
- Confirmed _CacheKey already uses 4-tuple: (instance, workspace, generation, resource)
- Cache is properly scoped per workspace, no cross-tenant leakage possible
- No code change needed, documented as working correctly

M-3: Invitation lock workspace scoping (FIXED)
- Changed lock key from token_digest to workspace_uuid:token_digest
- Prevents DoS where attacker locks token in Workspace A to block Workspace B
- Locks now isolated per workspace

All MEDIUM severity findings from security review now resolved.

* fix(cloud): unblock tenant CI and enforce knowledge quotas

* fix(tenancy): scope rerank model sync

---------

Co-authored-by: dadachann <185672915+dadachann@users.noreply.github.com>

web/src/app/home/components/settings-dialog/SettingsDialog.tsx

@@ -1,6 +1,12 @@
 import { useEffect, useState } from 'react';
 import { useTranslation } from 'react-i18next';
-import { KeyRound, Sparkles, Settings, HardDrive } from 'lucide-react';
+import {
+  HardDrive,
+  KeyRound,
+  Settings,
+  Sparkles,
+  UsersRound,
+} from 'lucide-react';
 import {
   Dialog,
   DialogContent,
@@ -22,10 +28,13 @@ import AccountSettingsPanel from '@/app/home/components/account-settings-dialog/
 import ApiIntegrationPanel from '@/app/home/components/api-integration-dialog/ApiIntegrationPanel';
 import ModelsPanel from '@/app/home/components/models-dialog/ModelsPanel';
 import StorageAnalysisPanel from '@/app/home/components/storage-analysis-dialog/StorageAnalysisPanel';
+import WorkspaceSettingsPanel from '@/app/home/components/workspace-settings/WorkspaceSettingsPanel';
+import { useCurrentWorkspace } from '@/app/infra/http';
 
 // The set of settings sections shown in the unified dialog. The string values
 // are also reused as the ?action= query param suffix so deep links keep working.
 export type SettingsSection =
+  | 'workspace'
   | 'account'
   | 'apiIntegration'
   | 'models'
@@ -35,6 +44,7 @@ export type SettingsSection =
 // (showAccountSettings, showApiIntegrationSettings, showModelSettings,
 // showStorageAnalysis) continue to resolve to the right section.
 export const SETTINGS_ACTION_BY_SECTION: Record<SettingsSection, string> = {
+  workspace: 'showWorkspaceSettings',
   account: 'showAccountSettings',
   apiIntegration: 'showApiIntegrationSettings',
   models: 'showModelSettings',
@@ -63,6 +73,7 @@ export default function SettingsDialog({
   onSectionChange,
 }: SettingsDialogProps) {
   const { t } = useTranslation();
+  const currentWorkspace = useCurrentWorkspace();
   // A nested modal (e.g. the provider form) can request that we ignore
   // outer-close until it is dismissed.
   const [blocking, setBlocking] = useState(false);
@@ -76,13 +87,20 @@ export default function SettingsDialog({
     }
   }, [section, open]);
 
-  const navItems: {
+  const allNavItems: {
     id: SettingsSection;
     label: string;
     title: string;
     description: string;
     icon: React.ReactNode;
   }[] = [
+    {
+      id: 'workspace',
+      label: t('settingsDialog.nav.workspace'),
+      title: t('workspace.title'),
+      description: t('workspace.description'),
+      icon: <UsersRound className="size-4" />,
+    },
     {
       id: 'models',
       label: t('settingsDialog.nav.models'),
@@ -112,6 +130,27 @@ export default function SettingsDialog({
       icon: <Settings className="size-4" />,
     },
   ];
+  const permissions = currentWorkspace?.permissions ?? [];
+  const canManageApiKeys = permissions.includes('api_key.manage');
+  const canViewAudit = permissions.includes('audit.view');
+  const navItems = allNavItems.filter((item) => {
+    if (item.id === 'apiIntegration') {
+      return canManageApiKeys;
+    }
+    if (item.id === 'storageAnalysis') {
+      return canViewAudit;
+    }
+    return true;
+  });
+
+  useEffect(() => {
+    const forbiddenSection =
+      (section === 'apiIntegration' && !canManageApiKeys) ||
+      (section === 'storageAnalysis' && !canViewAudit);
+    if (open && forbiddenSection) {
+      onSectionChange('workspace');
+    }
+  }, [canManageApiKeys, canViewAudit, open, section, onSectionChange]);
 
   const activeItem = navItems.find((item) => item.id === section);
   const activeLabel = activeItem?.title ?? t('settingsDialog.title');
@@ -201,6 +240,11 @@ export default function SettingsDialog({
             </div>
 
             <div className="flex min-h-0 flex-1 flex-col overflow-hidden">
+              {section === 'workspace' && (
+                <WorkspaceSettingsPanel
+                  active={open && section === 'workspace'}
+                />
+              )}
               {section === 'models' && (
                 <ModelsPanel
                   active={open && section === 'models'}