feat(kiro): add OAuth model name mappings support for Kiro

Add Kiro to the list of supported channels for OAuth model name mappings,
allowing users to map Kiro model IDs (e.g., kiro-claude-opus-4-5) to
canonical model names (e.g., claude-opus-4-5-20251101).

The Kiro case is implemented as a separate switch block to keep it
isolated from upstream CLIProxyAPI providers, making future merges
from the upstream repository cleaner.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

config.example.yaml

@@ -215,7 +215,7 @@ ws-auth: false
 
 # Global OAuth model name mappings (per channel)
 # These mappings rename model IDs for both model listing and request routing.
-# Supported channels: gemini-cli, vertex, aistudio, antigravity, claude, codex, qwen, iflow.
+# Supported channels: gemini-cli, vertex, aistudio, antigravity, claude, codex, qwen, iflow, kiro.
 # NOTE: Mappings do not apply to gemini-api-key, codex-api-key, claude-api-key, openai-compatibility, vertex-api-key, or ampcode.
 # oauth-model-mappings:
 #   gemini-cli:
@@ -243,6 +243,9 @@ ws-auth: false
 #   iflow:
 #     - name: "glm-4.7"
 #       alias: "glm-god"
+#   kiro:
+#     - name: "kiro-claude-opus-4-5"
+#       alias: "op45"
 
 # OAuth provider excluded models
 # oauth-excluded-models:

sdk/cliproxy/auth/model_name_mappings.go

@@ -165,6 +165,8 @@ func OAuthModelMappingChannel(provider, authKind string) string {
 		return "codex"
 	case "gemini-cli", "aistudio", "antigravity", "qwen", "iflow":
 		return provider
+	case "kiro":
+		return provider
 	default:
 		return ""
 	}