feat: add provider-aware model name resolution for attribution (cherry-pick 771e3db + f7f69b7)

- Add attributionModel.ts: getRealModelName() resolves model names for
  OpenAI/Gemini providers, so Git commit sign-off shows correct model
  name (DeepSeek/GPT/Gemini) instead of Anthropic default.
- Wire into attribution.ts: replace multi-branch fallback logic with
  simple getRealModelName() call.
- CCP's APIProvider doesn't include 'grok' — skipped that case.

src/utils/attribution.ts

@@ -21,6 +21,7 @@ import {
   isInternalModelRepoCached,
   sanitizeModelName,
 } from './commitAttribution.js'
+import { getRealModelName } from './attributionModel.js'
 import { logForDebugging } from './debug.js'
 import { parseJSONL } from './json.js'
 import { logError } from './log.js'
@@ -68,14 +69,8 @@ export function getAttributionTexts(): AttributionTexts {
   }
 
   // @[MODEL LAUNCH]: Update the hardcoded fallback model name below (guards against codename leaks).
-  // For internal repos, use the real model name. For external repos,
-  // fall back to "Claude Opus 4.6" for unrecognized models to avoid leaking codenames.
-  const model = getMainLoopModel()
-  const isKnownPublicModel = getPublicModelDisplayName(model) !== null
-  const modelName =
-    isInternalModelRepoCached() || isKnownPublicModel
-      ? getPublicModelName(model)
-      : 'Claude Opus 4.6'
+  // Uses getRealModelName() for provider-aware model resolution (DeepSeek/Gemini/Grok → correct name).
+  const modelName = getRealModelName() || 'Claude Opus 4.6'
   const defaultAttribution = `🤖 Generated with [Claude Code](${PRODUCT_URL})`
   const defaultCommit = `Co-Authored-By: ${modelName} <noreply@anthropic.com>`
 

src/utils/attributionModel.ts

@@ -0,0 +1,18 @@
+import { resolveGeminiModel, resolveOpenAIModel } from '@ant/model-provider'
+import { getMainLoopModel } from './model/model.js'
+import { getAPIProvider } from './model/providers.js'
+
+function resolveProviderModel(anthropicModel: string): string {
+  switch (getAPIProvider()) {
+    case 'openai':
+      return resolveOpenAIModel(anthropicModel)
+    case 'gemini':
+      return resolveGeminiModel(anthropicModel)
+    default:
+      return anthropicModel
+  }
+}
+
+export function getRealModelName(): string {
+  return resolveProviderModel(getMainLoopModel())
+}