chore(lint): burn down remaining warnings to zero

src/tools/registry.test.ts

@@ -1,6 +1,7 @@
 import { describe, it, expect, vi } from 'vitest';
 import { ToolRegistry } from './registry.js';
 import type { Tool } from './types.js';
+import type { ToolPolicy } from './policy.js';
 
 const echoTool: Tool = {
   name: 'test.echo',
@@ -114,8 +115,13 @@ describe('ToolRegistry', () => {
 
     it('inherits the policy from original', () => {
       const reg = new ToolRegistry();
-      const mockPolicy = { filterTools: vi.fn(), isAllowed: vi.fn(), resolveAllowedNames: vi.fn(), getEffectiveProfile: vi.fn() };
-      reg.setPolicy(mockPolicy as any);
+      const mockPolicy: ToolPolicy = {
+        filterTools: vi.fn((tools) => tools),
+        isAllowed: vi.fn(() => true),
+        resolveAllowedNames: vi.fn(() => new Set()),
+        getEffectiveProfile: vi.fn(() => ({ profile: 'full', source: 'explicit' })),
+      };
+      reg.setPolicy(mockPolicy);
 
       const cloned = reg.clone();
       expect(cloned.getPolicy()).toBe(mockPolicy);
@@ -131,8 +137,13 @@ describe('ToolRegistry', () => {
       replacementTool.description = 'Sandboxed version';
 
       cloned.replace(replacementTool);
-      expect(cloned.get('shell.exec')!.description).toBe('Sandboxed version');
-      expect(reg.get('shell.exec')!.description).toBe('Mock shell.exec');
+      const clonedTool = cloned.get('shell.exec');
+      const originalToolFromReg = reg.get('shell.exec');
+      if (!clonedTool || !originalToolFromReg) {
+        throw new Error('Expected shell.exec to exist in both registries');
+      }
+      expect(clonedTool.description).toBe('Sandboxed version');
+      expect(originalToolFromReg.description).toBe('Mock shell.exec');
     });
   });
 
@@ -153,7 +164,11 @@ describe('ToolRegistry', () => {
       replacement.description = 'New description';
 
       reg.replace(replacement);
-      expect(reg.get('tool.a')!.description).toBe('New description');
+      const replaced = reg.get('tool.a');
+      if (!replaced) {
+        throw new Error('Expected tool.a to be present');
+      }
+      expect(replaced.description).toBe('New description');
     });
 
     it('throws if tool does not exist', () => {