fix: normalize stale copilot raptor-mini model

tests/unit/copilot/copilot-model-normalizer.test.ts

@@ -0,0 +1,58 @@
+import { describe, expect, it } from 'bun:test';
+import { DEFAULT_COPILOT_CONFIG } from '../../../src/config/unified-config-types';
+import {
+  DEPRECATED_COPILOT_MODEL_IDS,
+  normalizeCopilotConfig,
+  normalizeCopilotModelId,
+  normalizeCopilotSettings,
+} from '../../../src/copilot/copilot-model-normalizer';
+
+describe('copilot-model-normalizer', () => {
+  it('tracks raptor-mini as deprecated', () => {
+    expect(DEPRECATED_COPILOT_MODEL_IDS).toContain('raptor-mini');
+  });
+
+  it('normalizes deprecated model IDs to the safe default', () => {
+    expect(normalizeCopilotModelId('raptor-mini')).toBe(DEFAULT_COPILOT_CONFIG.model);
+  });
+
+  it('normalizes Copilot config tier mappings', () => {
+    const normalized = normalizeCopilotConfig({
+      ...DEFAULT_COPILOT_CONFIG,
+      model: 'raptor-mini',
+      opus_model: 'raptor-mini',
+      sonnet_model: 'raptor-mini',
+      haiku_model: 'raptor-mini',
+    });
+
+    expect(normalized.model).toBe('gpt-4.1');
+    expect(normalized.opus_model).toBe('gpt-4.1');
+    expect(normalized.sonnet_model).toBe('gpt-4.1');
+    expect(normalized.haiku_model).toBe('gpt-4.1');
+  });
+
+  it('normalizes raw settings payloads without dropping unrelated env keys', () => {
+    const normalized = normalizeCopilotSettings(
+      {
+        env: {
+          ANTHROPIC_BASE_URL: 'http://127.0.0.1:4141',
+          ANTHROPIC_MODEL: 'raptor-mini',
+          ANTHROPIC_DEFAULT_OPUS_MODEL: 'raptor-mini',
+          ANTHROPIC_DEFAULT_SONNET_MODEL: 'raptor-mini',
+          ANTHROPIC_DEFAULT_HAIKU_MODEL: 'raptor-mini',
+          EXTRA_FLAG: 'keep-me',
+        },
+      },
+      {
+        ...DEFAULT_COPILOT_CONFIG,
+        model: 'raptor-mini',
+      }
+    );
+
+    expect(normalized.env?.ANTHROPIC_MODEL).toBe('gpt-4.1');
+    expect(normalized.env?.ANTHROPIC_DEFAULT_OPUS_MODEL).toBe('gpt-4.1');
+    expect(normalized.env?.ANTHROPIC_DEFAULT_SONNET_MODEL).toBe('gpt-4.1');
+    expect(normalized.env?.ANTHROPIC_DEFAULT_HAIKU_MODEL).toBe('gpt-4.1');
+    expect(normalized.env?.EXTRA_FLAG).toBe('keep-me');
+  });
+});