fix: resolve TypeScript errors in test files

- Add type assertions for factory options arrays
- Add 'this' type annotations to mock functions
- Fix missing required properties in test objects
- Change Mock to MockInstance for Vitest compatibility
- Add non-null assertions where needed

All 943 tests now passing

tests/unit/database/__mocks__/better-sqlite3.ts

@@ -13,30 +13,31 @@ export class MockDatabase {
   
   prepare(sql: string) {
     const key = this.extractTableName(sql);
+    const self = this;
     
     return {
-      all: vi.fn(() => this.data.get(key) || []),
+      all: vi.fn(() => self.data.get(key) || []),
       get: vi.fn((id: string) => {
-        const items = this.data.get(key) || [];
+        const items = self.data.get(key) || [];
         return items.find(item => item.id === id);
       }),
       run: vi.fn((params: any) => {
-        const items = this.data.get(key) || [];
+        const items = self.data.get(key) || [];
         items.push(params);
-        this.data.set(key, items);
+        self.data.set(key, items);
         return { changes: 1, lastInsertRowid: items.length };
       }),
       iterate: vi.fn(function* () {
-        const items = this.data.get(key) || [];
+        const items = self.data.get(key) || [];
         for (const item of items) {
           yield item;
         }
       }),
-      pluck: vi.fn(function() { return this; }),
-      expand: vi.fn(function() { return this; }),
-      raw: vi.fn(function() { return this; }),
+      pluck: vi.fn(function(this: any) { return this; }),
+      expand: vi.fn(function(this: any) { return this; }),
+      raw: vi.fn(function(this: any) { return this; }),
       columns: vi.fn(() => []),
-      bind: vi.fn(function() { return this; })
+      bind: vi.fn(function(this: any) { return this; })
     };
   }
   

tests/unit/database/database-adapter-unit.test.ts

@@ -65,11 +65,11 @@ describe('Database Adapter - Unit Tests', () => {
         get: vi.fn(),
         all: vi.fn(() => []),
         iterate: vi.fn(function* () {}),
-        pluck: vi.fn(function() { return this as any; }),
-        expand: vi.fn(function() { return this as any; }),
-        raw: vi.fn(function() { return this as any; }),
+        pluck: vi.fn(function(this: any) { return this; }),
+        expand: vi.fn(function(this: any) { return this; }),
+        raw: vi.fn(function(this: any) { return this; }),
         columns: vi.fn(() => []),
-        bind: vi.fn(function() { return this as any; })
+        bind: vi.fn(function(this: any) { return this; })
       };
       
       expect(mockStmt).toBeDefined();

tests/unit/database/template-repository-core.test.ts

@@ -136,13 +136,14 @@ describe('TemplateRepository - Core Functionality', () => {
         name: 'Test Workflow',
         description: 'A test workflow',
         user: {
+          id: 1,
           name: 'John Doe',
           username: 'johndoe',
           verified: true
         },
         nodes: [
-          { name: 'n8n-nodes-base.httpRequest', position: [0, 0] },
-          { name: 'n8n-nodes-base.slack', position: [100, 0] }
+          { id: 1, name: 'n8n-nodes-base.httpRequest', icon: 'fa:globe' },
+          { id: 2, name: 'n8n-nodes-base.slack', icon: 'fa:slack' }
         ],
         totalViews: 1000,
         createdAt: '2024-01-01T00:00:00Z'
@@ -150,6 +151,10 @@ describe('TemplateRepository - Core Functionality', () => {
       
       const detail: TemplateDetail = {
         id: 123,
+        name: 'Test Workflow',
+        description: 'A test workflow',
+        views: 1000,
+        createdAt: '2024-01-01T00:00:00Z',
         workflow: {
           nodes: [],
           connections: {},