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Félix MalfaitandGitHub 865ca697ca Fix AI permission gating: use Ask AI for chat UI, AI Settings for admin endpoints (#21030 )

## Summary

Closes #20662.

Two AI permission flags exist:
- **`AI`** (label "Ask AI") — user-facing: chat with AI agents, use AI
features
- **`AI_SETTINGS`** (label "AI") — admin: create and configure AI agents

After auditing every use of these flags I found:

### Frontend — chat UI gated by the admin permission (user-facing bug
from the issue)
A user granted only `Ask AI` could not see chat tabs, the "new chat"
button (desktop & mobile), or the chat content pane; thread
initialization was also skipped, leaving the chat in a half-initialized
state and producing intermittent `THREAD_NOT_FOUND` errors. Switched
these to `AI`:
- `MainNavigationDrawerTabsRow.tsx`
- `MainNavigationDrawer.tsx`
- `MobileNavigationBar.tsx`
- `AgentChatThreadInitializationEffect.tsx`

### Backend — admin-only resolvers gated by the user permission
(privilege escalation)
Two resolvers had a class-level guard of `AI`, letting any user with the
user-facing flag reach admin endpoints (skill CRUD, eval runs). Switched
the class-level guards to `AI_SETTINGS`:
- `SkillResolver` — create/update/delete/activate/deactivate skills
- `AgentTurnResolver` — read turns, run/grade evaluations

### Left as-is (already correct)
- `AgentResolver` — class-level `AI` for reads (workflow editors and
admin pages both need them), mutation-level `AI_SETTINGS` overrides for
writes
- `AgentChatResolver` & `AgentChatSubscriptionResolver` — already `AI`
- `AiGenerateTextController` — already `AI`
- Workspace AI config fields in `workspace.service.ts` — already
`AI_SETTINGS`

## Test plan

- [ ] As a user with `Ask AI` only (no `AI_SETTINGS`): chat tabs, "new
chat" button, and chat history pane are visible on desktop + mobile;
sending a message works; no `THREAD_NOT_FOUND` errors
- [ ] As a user with `AI_SETTINGS` but no `Ask AI`: chat UI is hidden
- [ ] As a user with `Ask AI` only: calling `skills` / `createSkill` /
`agentTurns` / `runEvaluationInput` via GraphQL returns permission
denied
- [ ] As an admin (`AI_SETTINGS`): skill settings and agent eval pages
still work

2026-05-28 20:21:58 +02:00