fix: address review feedback — restore V3 as legacy, fix zai base_url

- Restore deepseek-chat-v3-0324 and deepseek-reasoner with '(legacy)' labels;
  these are deprecated 2026-07-24 but still live until then
- Fix zai (Z.AI/GLM) default_base_url: use /api/paas/v4 instead of /api/coding/paas/v4;
  the coding plan path is for the glmcode custom provider, not the general API
- Update test assertions to match

api/config.py

@@ -503,6 +503,8 @@ _FALLBACK_MODELS = [
     # DeepSeek
     {"provider": "DeepSeek",  "id": "deepseek/deepseek-v4-flash",          "label": "DeepSeek V4 Flash"},
     {"provider": "DeepSeek",  "id": "deepseek/deepseek-v4-pro",            "label": "DeepSeek V4 Pro"},
+    {"provider": "DeepSeek",  "id": "deepseek/deepseek-chat-v3-0324",      "label": "DeepSeek V3 (legacy)"},
+    {"provider": "DeepSeek",  "id": "deepseek/deepseek-r1",                "label": "DeepSeek R1 (legacy)"},
     # Qwen (Alibaba) — strong coding and general models
     {"provider": "Qwen",      "id": "qwen/qwen3-coder",                   "label": "Qwen3 Coder"},
     {"provider": "Qwen",      "id": "qwen/qwen3.6-plus",                  "label": "Qwen3.6 Plus"},
@@ -655,6 +657,8 @@ _PROVIDER_MODELS = {
     "deepseek": [
         {"id": "deepseek-v4-flash", "label": "DeepSeek V4 Flash"},
         {"id": "deepseek-v4-pro", "label": "DeepSeek V4 Pro"},
+        {"id": "deepseek-chat-v3-0324", "label": "DeepSeek V3 (legacy)"},
+        {"id": "deepseek-reasoner", "label": "DeepSeek Reasoner (legacy)"},
     ],
     "nous": [
         {"id": "@nous:anthropic/claude-opus-4.6",     "label": "Claude Opus 4.6 (via Nous)"},

api/onboarding.py

@@ -112,7 +112,7 @@ _SUPPORTED_PROVIDER_SETUPS = {
         "label": "Z.AI / GLM (智谱)",
         "env_var": "GLM_API_KEY",
         "default_model": "glm-5.1",
-        "default_base_url": "https://open.bigmodel.cn/api/coding/paas/v4",
+        "default_base_url": "https://open.bigmodel.cn/api/paas/v4",
         "requires_base_url": False,
         "models": list(_PROVIDER_MODELS.get("zai", [])),
         "category": "specialized",

static/index.html

@@ -381,6 +381,7 @@
                 <option value="google/gemini-3-flash-preview">Gemini 3 Flash Preview</option>
                 <option value="deepseek/deepseek-v4-flash">DeepSeek V4 Flash</option>
                 <option value="deepseek/deepseek-v4-pro">DeepSeek V4 Pro</option>
+                <option value="deepseek/deepseek-chat-v3-0324">DeepSeek V3 (legacy)</option>
                 <option value="meta-llama/llama-4-scout">Llama 4 Scout</option>
               </optgroup>
             </select>

static/ui.js

@@ -701,7 +701,7 @@ function getModelLabel(modelId){
   // Check dynamic labels first, then fall back to splitting the ID
   if(_dynamicModelLabels[modelId]) return _dynamicModelLabels[modelId];
   // Static fallback for common models
-  const STATIC_LABELS={'openai/gpt-5.4-mini':'GPT-5.4 Mini','openai/gpt-4o':'GPT-4o','openai/o3':'o3','openai/o4-mini':'o4-mini','anthropic/claude-sonnet-4.6':'Sonnet 4.6','anthropic/claude-sonnet-4-5':'Sonnet 4.5','anthropic/claude-haiku-3-5':'Haiku 3.5','google/gemini-3.1-pro-preview':'Gemini 3.1 Pro','google/gemini-3-flash-preview':'Gemini 3 Flash','google/gemini-3.1-flash-lite-preview':'Gemini 3.1 Flash Lite','google/gemini-2.5-pro':'Gemini 2.5 Pro','google/gemini-2.5-flash':'Gemini 2.5 Flash','deepseek/deepseek-v4-flash':'DeepSeek V4 Flash','deepseek/deepseek-v4-pro':'DeepSeek V4 Pro','meta-llama/llama-4-scout':'Llama 4 Scout'};
+  const STATIC_LABELS={'openai/gpt-5.4-mini':'GPT-5.4 Mini','openai/gpt-4o':'GPT-4o','openai/o3':'o3','openai/o4-mini':'o4-mini','anthropic/claude-sonnet-4.6':'Sonnet 4.6','anthropic/claude-sonnet-4-5':'Sonnet 4.5','anthropic/claude-haiku-3-5':'Haiku 3.5','google/gemini-3.1-pro-preview':'Gemini 3.1 Pro','google/gemini-3-flash-preview':'Gemini 3 Flash','google/gemini-3.1-flash-lite-preview':'Gemini 3.1 Flash Lite','google/gemini-2.5-pro':'Gemini 2.5 Pro','google/gemini-2.5-flash':'Gemini 2.5 Flash','deepseek/deepseek-v4-flash':'DeepSeek V4 Flash','deepseek/deepseek-v4-pro':'DeepSeek V4 Pro','deepseek/deepseek-chat-v3-0324':'DeepSeek V3 (legacy)','meta-llama/llama-4-scout':'Llama 4 Scout'};
   if(STATIC_LABELS[modelId]) return STATIC_LABELS[modelId];
   // Safe Ollama-tag fallback formatter before generic split('/').pop()
   let _last = modelId.split('/').pop() || modelId;

tests/test_custom_providers_in_panel.py

@@ -226,20 +226,20 @@ class TestDeepSeekV4Models:
     """Verify DeepSeek V4 models are in the model lists, V3 is removed."""
 
     def test_v4_models_in_provider_models(self):
-        """_PROVIDER_MODELS['deepseek'] should contain v4-flash and v4-pro only."""
+        """_PROVIDER_MODELS['deepseek'] should contain v4 and legacy v3 entries."""
         from api.config import _PROVIDER_MODELS
         ds_models = _PROVIDER_MODELS.get("deepseek", [])
         ids = {m["id"] for m in ds_models}
 
-        assert "deepseek-v4-flash" in ids, f"v4-flash missing from deepseek models: {ids}"
-        assert "deepseek-v4-pro" in ids, f"v4-pro missing from deepseek models: {ids}"
+        assert "deepseek-v4-flash" in ids, f"v4-flash missing: {ids}"
+        assert "deepseek-v4-pro" in ids, f"v4-pro missing: {ids}"
 
-        # V3 / legacy models should be gone
-        assert "deepseek-chat-v3-0324" not in ids, (
-            f"deprecated V3 should not be in model list: {ids}"
+        # Legacy models still present (deprecated 2026-07-24, not yet removed)
+        assert "deepseek-chat-v3-0324" in ids, (
+            f"V3 legacy should remain until deprecation date: {ids}"
         )
-        assert "deepseek-reasoner" not in ids, (
-            f"deprecated reasoner should not be in model list: {ids}"
+        assert "deepseek-reasoner" in ids, (
+            f"Reasoner legacy should remain until deprecation date: {ids}"
         )
 
     def test_zai_models_include_glm_series(self):
@@ -265,7 +265,7 @@ class TestDeepSeekV4Models:
         assert zai["label"] == "Z.AI / GLM (智谱)"
         assert zai["env_var"] == "GLM_API_KEY"
         assert zai["default_model"] == "glm-5.1"
-        assert zai["default_base_url"] == "https://open.bigmodel.cn/api/coding/paas/v4"
+        assert zai["default_base_url"] == "https://open.bigmodel.cn/api/paas/v4"
 
     def test_deepseek_onboarding_default_is_v4(self):
         """DeepSeek onboarding default should be v4-flash, not V3."""