fix(canvas): resolve TS errors in test fixtures — budgetLimit and AuthGate mock types

- Add budgetLimit: null to WorkspaceNodeData fixtures in canvas-capabilities,
  canvas-events, canvas-events-pan, and canvas.test.ts (inline objects)
- Add budget_limit: null to WorkspaceData fixtures in canvas-topology,
  canvas.test.ts makeWS, and ProvisioningTimeout.test.tsx
- Fix AuthGate.test.tsx TS2348: cast vi.fn() mocks to explicit call
  signatures inside vi.mock() factories (Procedure | Constructable issue)
- npx tsc --noEmit: 0 errors; 689/689 tests passing

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

canvas/src/components/__tests__/AuthGate.test.tsx

@@ -19,12 +19,14 @@ beforeEach(() => {
 });
 
 vi.mock("@/lib/auth", () => ({
-  fetchSession: (...args: unknown[]) => mockFetchSession(...args),
-  redirectToLogin: (...args: unknown[]) => mockRedirectToLogin(...args),
+  // Cast required: vi.fn() returns Mock<Procedure | Constructable> which TypeScript
+  // won't call directly inside a factory closure (TS2348). Cast to Function resolves it.
+  fetchSession: (...args: unknown[]) => (mockFetchSession as unknown as (...a: unknown[]) => unknown)(...args),
+  redirectToLogin: (...args: unknown[]) => (mockRedirectToLogin as unknown as (...a: unknown[]) => unknown)(...args),
 }));
 
 vi.mock("@/lib/tenant", () => ({
-  getTenantSlug: (...args: unknown[]) => mockGetTenantSlug(...args),
+  getTenantSlug: (...args: unknown[]) => (mockGetTenantSlug as unknown as (...a: unknown[]) => unknown)(...args),
 }));
 
 // Import after mocks are set up

canvas/src/components/__tests__/ProvisioningTimeout.test.tsx

@@ -28,6 +28,7 @@ function makeWS(overrides: Partial<WorkspaceData> & { id: string }): WorkspaceDa
     y: 0,
     collapsed: false,
     runtime: "",
+    budget_limit: null,
     ...overrides,
   };
 }

canvas/src/store/__tests__/canvas-capabilities.test.ts

@@ -22,6 +22,7 @@ function makeNodeData(overrides: Partial<WorkspaceNodeData> = {}): WorkspaceNode
     currentTask: "",
     needsRestart: false,
     runtime: "",
+    budgetLimit: null,
     ...overrides,
   };
 }

canvas/src/store/__tests__/canvas-events-pan.test.ts

@@ -34,6 +34,7 @@ function makeNode(
       currentTask: "",
       needsRestart: false,
       runtime: "",
+      budgetLimit: null,
       ...overrides,
     },
   };

canvas/src/store/__tests__/canvas-events.test.ts

@@ -31,6 +31,7 @@ function makeNode(
       currentTask: "",
       needsRestart: false,
       runtime: "",
+      budgetLimit: null,
       ...overrides,
     },
   };

canvas/src/store/__tests__/canvas-topology.test.ts

@@ -24,6 +24,7 @@ function makeWS(overrides: Partial<WorkspaceData> & { id: string }): WorkspaceDa
     y: 0,
     collapsed: false,
     runtime: "",
+    budget_limit: null,
     ...overrides,
   };
 }

canvas/src/store/__tests__/canvas.test.ts

@@ -27,6 +27,7 @@ function makeWS(overrides: Partial<WorkspaceData> & { id: string }): WorkspaceDa
     y: 0,
     collapsed: false,
     runtime: "",
+    budget_limit: null,
     ...overrides,
   };
 }
@@ -172,6 +173,7 @@ describe("summarizeWorkspaceCapabilities", () => {
       currentTask: "Reviewing docs",
       needsRestart: false,
       runtime: "claude-code",
+      budgetLimit: null,
     });
 
     expect(summary.runtime).toBe("claude-code");
@@ -197,6 +199,7 @@ describe("summarizeWorkspaceCapabilities", () => {
       currentTask: "   ",
       needsRestart: false,
       runtime: "",
+      budgetLimit: null,
     });
 
     expect(summary.runtime).toBeNull();
@@ -554,6 +557,7 @@ describe("context menu", () => {
       currentTask: "",
       needsRestart: false,
       runtime: "",
+      budgetLimit: null,
     },
   };