Add unit tests for skill capabilities, skill planner, and UV setup

- Implement tests for random ID generation, ensuring preference for crypto.randomUUID.
- Create tests for runtime context capabilities, validating the injection of enabled skill capabilities.
- Add tests for skill capability parsing, including classification and command example extraction.
- Introduce tests for the skill planner, verifying tool call planning based on user requests and attachment requirements.
- Establish tests for UV setup, ensuring proper handling of Python installation scenarios and environment checks.

tests/gateway-startup-helpers.test.ts

@@ -33,6 +33,7 @@ import { GatewayLifecycleController, LifecycleSupersededError } from '../electro
 import { GatewayConnectionMonitor } from '../electron/gateway/connection-monitor';
 import { GatewayRestartController } from '../electron/gateway/restart-controller';
 import { GatewayRestartGovernor } from '../electron/gateway/restart-governor';
+import { createRandomId } from '../electron/gateway/random-id';
 import {
   DEFAULT_GATEWAY_RELOAD_POLICY,
   parseGatewayReloadPolicy,
@@ -69,6 +70,52 @@ describe('startup-stderr helpers', () => {
   });
 });
 
+describe('random-id helpers', () => {
+  it('prefers crypto.randomUUID when available', () => {
+    const originalCrypto = Object.getOwnPropertyDescriptor(globalThis, 'crypto');
+
+    try {
+      Object.defineProperty(globalThis, 'crypto', {
+        value: {
+          randomUUID: () => 'uuid-from-crypto',
+        },
+        configurable: true,
+      });
+
+      expect(createRandomId()).toBe('uuid-from-crypto');
+    } finally {
+      if (originalCrypto) {
+        Object.defineProperty(globalThis, 'crypto', originalCrypto);
+      } else {
+        Reflect.deleteProperty(globalThis, 'crypto');
+      }
+    }
+  });
+
+  it('falls back to a deterministic local id when crypto.randomUUID is unavailable', () => {
+    const originalCrypto = Object.getOwnPropertyDescriptor(globalThis, 'crypto');
+    const dateNowSpy = vi.spyOn(Date, 'now').mockReturnValue(1760000000000);
+    const mathRandomSpy = vi.spyOn(Math, 'random').mockReturnValue(0.5);
+
+    try {
+      Object.defineProperty(globalThis, 'crypto', {
+        value: undefined,
+        configurable: true,
+      });
+
+      expect(createRandomId()).toMatch(/^id-1760000000000-/);
+    } finally {
+      dateNowSpy.mockRestore();
+      mathRandomSpy.mockRestore();
+      if (originalCrypto) {
+        Object.defineProperty(globalThis, 'crypto', originalCrypto);
+      } else {
+        Reflect.deleteProperty(globalThis, 'crypto');
+      }
+    }
+  });
+});
+
 describe('startup-recovery helpers', () => {
   it('retries transient startup errors before max attempts', () => {
     expect(getGatewayStartupRecoveryAction({