feat(KB-503): add multi-project CLI support with project subcommands

- Add project subcommands: list, add, remove, show, set-default, detect
- Add --project flag support for all task commands
- Create project-context.ts utilities for project resolution
- Add defaultProjectId to GlobalSettings type
- Implement project auto-detection from cwd
- Update CLI argument parsing for global --project flag
- Add multi-project CLI documentation to AGENTS.md

packages/dashboard/app/hooks/__tests__/useAgentLogs.test.ts

@@ -74,7 +74,7 @@ describe("useAgentLogs", () => {
 
     expect(mockFetchAgentLogs).toHaveBeenCalledWith("FN-001");
     expect(MockEventSource.instances).toHaveLength(1);
-    expect(MockEventSource.instances[0].url).toBe("/api/tasks/KB-001/logs/stream");
+    expect(MockEventSource.instances[0].url).toBe("/api/tasks/FN-001/logs/stream");
   });
 
   it("appends live SSE entries to historical entries", async () => {