test(CI): fix all test failures from lint changes

Fixed test expectations to match new behavior after lint fixes:
- Updated null/undefined expectations to match ?? null conversions
- Fixed Vitest jest-dom matcher integration
- Fixed API client test mock responses
- Fixed date utilities to respect referenceDate parameter
- Removed unnecessary optional chaining in permission guard
- Fixed unnecessary conditional in DomainList
- Fixed act() usage in LinkAutocomplete tests (async where needed)

Results:
- API: 733 tests passing, 0 failures
- Web: 307 tests passing, 23 properly skipped, 0 failures
- Total: 1040 passing tests

Refs #CI-run-19

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

apps/web/src/lib/api/client.test.ts

@@ -21,7 +21,7 @@ describe("API Client", (): void => {
       const mockData = { id: "1", name: "Test" };
       mockFetch.mockResolvedValueOnce({
         ok: true,
-        json: () => mockData,
+        json: () => Promise.resolve(mockData),
       });
 
       const result = await apiRequest<typeof mockData>("/test");
@@ -41,7 +41,7 @@ describe("API Client", (): void => {
     it("should include custom headers", async (): Promise<void> => {
       mockFetch.mockResolvedValueOnce({
         ok: true,
-        json: () => ({}),
+        json: () => Promise.resolve({}),
       });
 
       await apiRequest("/test", {
@@ -63,10 +63,11 @@ describe("API Client", (): void => {
       mockFetch.mockResolvedValueOnce({
         ok: false,
         statusText: "Not Found",
-        json: () => ({
-          code: "NOT_FOUND",
-          message: "Resource not found",
-        }),
+        json: () =>
+          Promise.resolve({
+            code: "NOT_FOUND",
+            message: "Resource not found",
+          }),
       });
 
       await expect(apiRequest("/test")).rejects.toThrow("Resource not found");
@@ -76,9 +77,7 @@ describe("API Client", (): void => {
       mockFetch.mockResolvedValueOnce({
         ok: false,
         statusText: "Internal Server Error",
-        json: () => {
-          throw new Error("Invalid JSON");
-        },
+        json: () => Promise.reject(new Error("Invalid JSON")),
       });
 
       await expect(apiRequest("/test")).rejects.toThrow("Internal Server Error");
@@ -90,7 +89,7 @@ describe("API Client", (): void => {
       const mockData = { id: "1" };
       mockFetch.mockResolvedValueOnce({
         ok: true,
-        json: () => mockData,
+        json: () => Promise.resolve(mockData),
       });
 
       const result = await apiGet<typeof mockData>("/test");
@@ -109,7 +108,7 @@ describe("API Client", (): void => {
       const mockResponse = { id: "1", ...postData };
       mockFetch.mockResolvedValueOnce({
         ok: true,
-        json: () => mockResponse,
+        json: () => Promise.resolve(mockResponse),
       });
 
       const result = await apiPost<typeof mockResponse>("/test", postData);
@@ -127,7 +126,7 @@ describe("API Client", (): void => {
     it("should make a POST request without data", async (): Promise<void> => {
       mockFetch.mockResolvedValueOnce({
         ok: true,
-        json: () => ({}),
+        json: () => Promise.resolve({}),
       });
 
       await apiPost("/test");
@@ -152,7 +151,7 @@ describe("API Client", (): void => {
       const mockResponse = { id: "1", ...patchData };
       mockFetch.mockResolvedValueOnce({
         ok: true,
-        json: () => mockResponse,
+        json: () => Promise.resolve(mockResponse),
       });
 
       const result = await apiPatch<typeof mockResponse>("/test/1", patchData);
@@ -172,7 +171,7 @@ describe("API Client", (): void => {
     it("should make a DELETE request", async (): Promise<void> => {
       mockFetch.mockResolvedValueOnce({
         ok: true,
-        json: () => ({ success: true }),
+        json: () => Promise.resolve({ success: true }),
       });
 
       const result = await apiDelete<{ success: boolean }>("/test/1");
@@ -197,10 +196,11 @@ describe("API Client", (): void => {
         ok: false,
         statusText: "Unauthorized",
         status: 401,
-        json: () => ({
-          code: "UNAUTHORIZED",
-          message: "Authentication required",
-        }),
+        json: () =>
+          Promise.resolve({
+            code: "UNAUTHORIZED",
+            message: "Authentication required",
+          }),
       });
 
       await expect(apiGet("/test")).rejects.toThrow("Authentication required");
@@ -211,10 +211,11 @@ describe("API Client", (): void => {
         ok: false,
         statusText: "Forbidden",
         status: 403,
-        json: () => ({
-          code: "FORBIDDEN",
-          message: "Access denied",
-        }),
+        json: () =>
+          Promise.resolve({
+            code: "FORBIDDEN",
+            message: "Access denied",
+          }),
       });
 
       await expect(apiGet("/test")).rejects.toThrow("Access denied");
@@ -225,10 +226,11 @@ describe("API Client", (): void => {
         ok: false,
         statusText: "Not Found",
         status: 404,
-        json: () => ({
-          code: "NOT_FOUND",
-          message: "Resource not found",
-        }),
+        json: () =>
+          Promise.resolve({
+            code: "NOT_FOUND",
+            message: "Resource not found",
+          }),
       });
 
       await expect(apiGet("/test")).rejects.toThrow("Resource not found");
@@ -239,10 +241,11 @@ describe("API Client", (): void => {
         ok: false,
         statusText: "Internal Server Error",
         status: 500,
-        json: () => ({
-          code: "INTERNAL_ERROR",
-          message: "Internal server error",
-        }),
+        json: () =>
+          Promise.resolve({
+            code: "INTERNAL_ERROR",
+            message: "Internal server error",
+          }),
       });
 
       await expect(apiGet("/test")).rejects.toThrow("Internal server error");
@@ -251,9 +254,7 @@ describe("API Client", (): void => {
     it("should handle malformed JSON responses", async (): Promise<void> => {
       mockFetch.mockResolvedValueOnce({
         ok: true,
-        json: () => {
-          throw new Error("Unexpected token in JSON");
-        },
+        json: () => Promise.reject(new Error("Unexpected token in JSON")),
       });
 
       await expect(apiGet("/test")).rejects.toThrow("Unexpected token in JSON");
@@ -264,9 +265,7 @@ describe("API Client", (): void => {
         ok: false,
         statusText: "Bad Request",
         status: 400,
-        json: () => {
-          throw new Error("No JSON body");
-        },
+        json: () => Promise.reject(new Error("No JSON body")),
       });
 
       await expect(apiGet("/test")).rejects.toThrow("Bad Request");
@@ -289,16 +288,17 @@ describe("API Client", (): void => {
         ok: false,
         statusText: "Validation Error",
         status: 422,
-        json: () => ({
-          code: "VALIDATION_ERROR",
-          message: "Invalid input",
-          details: {
-            fields: {
-              email: "Invalid email format",
-              password: "Password too short",
+        json: () =>
+          Promise.resolve({
+            code: "VALIDATION_ERROR",
+            message: "Invalid input",
+            details: {
+              fields: {
+                email: "Invalid email format",
+                password: "Password too short",
+              },
             },
-          },
-        }),
+          }),
       });
 
       await expect(apiGet("/test")).rejects.toThrow("Invalid input");
@@ -315,10 +315,11 @@ describe("API Client", (): void => {
         ok: false,
         statusText: "Too Many Requests",
         status: 429,
-        json: () => ({
-          code: "RATE_LIMIT_EXCEEDED",
-          message: "Too many requests. Please try again later.",
-        }),
+        json: () =>
+          Promise.resolve({
+            code: "RATE_LIMIT_EXCEEDED",
+            message: "Too many requests. Please try again later.",
+          }),
       });
 
       await expect(apiGet("/test")).rejects.toThrow("Too many requests. Please try again later.");