Improve LogOutputChannel mock completeness in tests

Co-authored-by: eleanorjboyd <26030610+eleanorjboyd@users.noreply.github.com>

Author: Copilot

src/test/managers/builtin/helpers.shouldUseUv.unit.test.ts

@@ -16,11 +16,23 @@ suite('Helpers - shouldUseUv', () => {
             get: sinon.stub(),
         };
         getConfigurationStub.returns(mockConfig);
+        // Create a more complete mock for LogOutputChannel
         mockLog = {
             info: sinon.stub(),
             error: sinon.stub(),
             warn: sinon.stub(),
             append: sinon.stub(),
+            debug: sinon.stub(),
+            trace: sinon.stub(),
+            show: sinon.stub(),
+            hide: sinon.stub(),
+            dispose: sinon.stub(),
+            clear: sinon.stub(),
+            replace: sinon.stub(),
+            appendLine: sinon.stub(),
+            name: 'test-log',
+            logLevel: 1,
+            onDidChangeLogLevel: sinon.stub() as any,
         } as unknown as LogOutputChannel;
     });