feat: add Claude and OpenRouter AI providers

OpenRouter is used when no provider flag is set. Claude is selected with .cl, and GLM stays available via .glm.

app/config.py

@@ -63,6 +63,18 @@ class AiConfig:
             model="deepseek-v4-flash",
         )
     )
+    claude: AiProviderConfig = field(
+        default_factory=lambda: AiProviderConfig(
+            api_url="https://api.anthropic.com",
+            model="claude-haiku-5-5",
+        )
+    )
+    openrouter: AiProviderConfig = field(
+        default_factory=lambda: AiProviderConfig(
+            api_url="https://openrouter.ai/api/v1",
+            model="anthropic/claude-haiku-5.5",
+        )
+    )
     prompt_dir: Path = Path("prompts")
     base_dir: Path = Path(".")
     max_context_messages: int = 100
@@ -215,6 +227,18 @@ def _parse_ai_config(raw: Any) -> AiConfig:
         default_model="deepseek-v4-flash",
         env_prefix="DEEPSEEK",
     )
+    claude = parse_provider(
+        "claude",
+        default_url="https://api.anthropic.com",
+        default_model="claude-haiku-5-5",
+        env_prefix="CLAUDE",
+    )
+    openrouter = parse_provider(
+        "openrouter",
+        default_url="https://openrouter.ai/api/v1",
+        default_model="anthropic/claude-haiku-5.5",
+        env_prefix="OPENROUTER",
+    )
     max_context_messages = _parse_int(
         raw_config.get("max_context_messages", 100),
         field_name="ai.max_context_messages",
@@ -294,6 +318,8 @@ def _parse_ai_config(raw: Any) -> AiConfig:
     return AiConfig(
         glm=glm,
         deepseek=deepseek,
+        claude=claude,
+        openrouter=openrouter,
         prompt_dir=prompt_dir,
         max_context_messages=max_context_messages,
         max_media_bytes=max_media_bytes,