merge: AgentProject membership — the junction is now load-bearing

Merges feat/agent-project-membership (task 166/152). An agent can finally join
many projects: membership routes, per-membership role and optional brain
override, chat resolving context from the membership, and CLI attach-agent /
detach-agent / get memberships. The legacy Agent.projectId fallback is kept for
this release as the schema comment promises.

Conflict resolved in main.ts: that branch added its RBAC case to
mapUrlToPermission inline, while this branch had extracted the function to
middleware/url-permission.ts so it could be tested. Kept the extraction and
ported the case into it — joining a team is `edit:agents:<name>`, not
`create:agents`, which is the authority to mint a whole agent.

Also fixes something the extraction makes possible. security.test.ts contained a
hand-copied reproduction of mapUrlToPermission, because main.ts self-invokes
main() and nothing in it was importable. A security test asserting against a
copy stops testing the system the moment the real one changes, and this copy had
already drifted. It now imports the real function; all 18 assertions still pass,
against the code that actually runs.

Local: build clean, workspace 2550 passed, lint unchanged at 794 errors.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01N4wNHWf7xSwnZCWpJcyv9p

.taskmaster/tasks/task_069.md

@@ -0,0 +1,59 @@
+# Task ID: 69
+
+**Title:** Add CLI unit tests for new prompt and project flags
+
+**Status:** done
+
+**Dependencies:** 59 ✓, 60 ✓, 61 ✓, 62 ✓
+
+**Priority:** medium
+
+**Description:** Create unit tests for the new CLI flags: --priority, --link for prompts, -A for get, and gated field for projects.
+
+**Details:**
+
+1. Add tests in `/src/cli/tests/commands/prompt.test.ts`:
+   ```typescript
+   describe('create prompt command', () => {
+     it('--priority sets prompt priority', async () => {
+       await cli('create prompt test --priority 8');
+       expect(mockApi.post).toHaveBeenCalledWith(
+         '/api/v1/prompts',
+         expect.objectContaining({ priority: 8 })
+       );
+     });
+     
+     it('--priority validates range 1-10', async () => {
+       await expect(cli('create prompt test --priority 15'))
+         .rejects.toThrow('Priority must be between 1 and 10');
+     });
+     
+     it('--link sets linkTarget', async () => {
+       await cli('create prompt test --link proj/srv:uri');
+       expect(mockApi.post).toHaveBeenCalledWith(
+         '/api/v1/prompts',
+         expect.objectContaining({ linkTarget: 'proj/srv:uri' })
+       );
+     });
+   });
+   
+   describe('get prompt command', () => {
+     it('-A shows all projects', async () => {
+       await cli('get prompt -A');
+       expect(mockApi.get).toHaveBeenCalledWith('/api/v1/prompts?all=true');
+     });
+   });
+   ```
+
+2. Add tests for project gated field editing
+
+3. Add tests for describe project output
+
+**Test Strategy:**
+
+This task IS the test implementation. Verify:
+- Flag parsing tests pass
+- Validation tests cover edge cases
+- API call tests verify correct parameters
+- Output formatting tests verify columns
+- Tests mock API properly