feat: timeline UI overhaul with project/resource panel redesign, quick filters, and API improvements

Redesigned timeline project and resource panels with expanded detail views,
added quick filter toolbar, improved drag handling, and enhanced vacation/entitlement
router logic. Includes e2e test updates and minor API fixes.

Co-Authored-By: claude-flow <ruv@ruv.net>

packages/api/src/__tests__/vacation-router.test.ts

@@ -203,6 +203,9 @@ describe("vacation router", () => {
         user: {
           findUnique: vi.fn().mockResolvedValue({ id: "user_1", systemRole: "USER" }),
         },
+        resource: {
+          findUnique: vi.fn().mockResolvedValue({ userId: "user_1" }),
+        },
         vacation: {
           findFirst: vi.fn().mockResolvedValue(null),
           create: vi.fn().mockResolvedValue(createdVacation),
@@ -270,6 +273,9 @@ describe("vacation router", () => {
         user: {
           findUnique: vi.fn().mockResolvedValue({ id: "user_1", systemRole: "USER" }),
         },
+        resource: {
+          findUnique: vi.fn().mockResolvedValue({ userId: "user_1" }),
+        },
         vacation: {
           findFirst: vi.fn().mockResolvedValue({ id: "existing_vac" }),
         },
@@ -314,6 +320,9 @@ describe("vacation router", () => {
         user: {
           findUnique: vi.fn().mockResolvedValue({ id: "user_1", systemRole: "USER" }),
         },
+        resource: {
+          findUnique: vi.fn().mockResolvedValue({ userId: "user_1" }),
+        },
         vacation: {
           findFirst: vi.fn().mockResolvedValue(null),
           create: vi.fn().mockResolvedValue(createdVacation),
@@ -469,6 +478,9 @@ describe("vacation router", () => {
       };
 
       const db = {
+        user: {
+          findUnique: vi.fn().mockResolvedValue({ id: "user_1", systemRole: "USER" }),
+        },
         vacation: {
           findUnique: vi.fn().mockResolvedValue(sampleVacation),
           update: vi.fn().mockResolvedValue(updatedVacation),