feat(KB-618): add multi-project support to dashboard

- Add project API methods and types (fetchProjects, registerProject, fetchProjectHealth, etc.)
- Add ProjectCard component with health metrics, status badges, and pause/resume actions
- Add server-side project management routes for multi-project orchestration
- Add ActivityFeed component with grouped entries and project badges
- Add SetupWizard component with 5-step project creation flow
- Fix TypeScript errors in server routes for listProjects and getGlobalConcurrencyState

packages/engine/src/merger.test.ts

@@ -339,7 +339,7 @@ describe("aiMergeTask — includeTaskIdInCommit setting", () => {
       (call) => String(call[0]).includes("git commit"),
     );
     expect(commitCall).toBeDefined();
-    expect(String(commitCall![0])).toContain("feat(FN-050):");
+    expect(String(commitCall![0])).toContain("feat(KB-050):");
   });
 
   it("fallback commit omits task ID when includeTaskIdInCommit is false", async () => {