feat(pineagents): 模型静态展示目录(描述/价格/分类/标签) + ModelInfo 扩展

- ModelInfo 追加可选 description/price/category/tags(默认为空,不破坏现有构造,经
  model_dump + response_model 自动透传前端,无需改序列化)。
- 新增 providers/pineagents_catalog.py:按模型 id 的静态展示目录(覆盖 Qwen/DeepSeek/
  GLM/Kimi/MiniMax/MiMo/ModelScope 等) + enrich_catalog() 在拉取结果上回填;未命中
  优雅降级为仅名+能力标签,不修改调用参数。
- provider_manager.list_provider_info:pineagents 拉取成功后回填目录元数据。
- 新增 tests/test_pineagents_catalog.py(命中/免费/未命中/空/大小写),6 passed。

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

tests/test_pineagents_catalog.py

@@ -0,0 +1,67 @@
+# -*- coding: utf-8 -*-
+"""PineAgents 模型静态展示目录单测。"""
+import pytest
+
+from pineagents.providers.pineagents_catalog import (
+    PINEAGENTS_MODEL_CATALOG as _catalog_pub,
+    enrich_catalog,
+)
+from pineagents.providers.provider import ModelInfo
+
+
+pytestmark = pytest.mark.unit
+
+
+def test_enrich_catalog_hit_fills_metadata():
+    """命中目录：回填描述/价格/分类/标签/is_free，且不改调用参数。"""
+    src = [
+        ModelInfo(
+            id="qwen3.7-max",
+            name="Qwen3.7 Max",
+            supports_image=False,
+            supports_video=False,
+            thinking_enabled=True,
+        )
+    ]
+    out = enrich_catalog(src)
+    m = out[0]
+    assert m.description
+    assert m.price
+    assert m.category == "文本"
+    assert m.tags
+    # 调用参数保持不变
+    assert m.thinking_enabled is True
+    assert m.supports_multimodal is None
+
+
+def test_enrich_catalog_free_model():
+    """免费模型 is_free 命中为 True。"""
+    out = enrich_catalog([ModelInfo(id="Qwen/Qwen3.5-122B-A10B", name="Q3.5")])
+    assert out[0].is_free is True
+    assert out[0].price == "免费"
+
+
+def test_enrich_catalog_miss_degrades():
+    """未命中目录：原样返回，不填充展示字段。"""
+    out = enrich_catalog([ModelInfo(id="unknown-model-xyz", name="X")])
+    m = out[0]
+    assert m.id == "unknown-model-xyz"
+    assert m.name == "X"
+    assert m.description is None
+    assert m.price is None
+    assert m.tags == []
+
+
+def test_enrich_catalog_empty():
+    assert enrich_catalog([]) == []
+
+
+def test_enrich_catalog_case_insensitive():
+    """id 大小写不同仍能命中（查找表已归一化）。"""
+    out = enrich_catalog([ModelInfo(id="MINIMAX-M2.5", name="MM")])
+    assert out[0].category == "文本"
+
+
+def test_catalog_public_entries():
+    """公共目录表不应为空（供回填使用）。"""
+    assert len(_catalog_pub) > 0