feat(tui): auto-correct base URL if required path suffix is missing

Providers that need /v1 (lmstudio, llamacpp, qwen) now declare a
url_suffix field. The AI settings save action appends it automatically
and notifies the user if they entered a URL without it.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/pyra/config/tui.py

@@ -171,6 +171,15 @@ class _AITab(VerticalScroll):
         base_url    = self.query_one("#ai-base-url", Input).value.strip() or None
         api_key     = self.query_one("#ai-key", Input).value.strip()
 
+        if base_url and provider.url_suffix and not base_url.rstrip("/").endswith(provider.url_suffix):
+            base_url = base_url.rstrip("/") + provider.url_suffix
+            self.query_one("#ai-base-url", Input).value = base_url
+            self.app.notify(
+                f"Base URL must end with '{provider.url_suffix}' for {provider.display_name} — corrected automatically.",
+                severity="warning",
+                timeout=6,
+            )
+
         cfg = load_config()
         cfg.ai.provider_id = provider_id
         cfg.ai.model = model

src/pyra/setup/providers.py

@@ -9,6 +9,7 @@ class Provider:
     default_model: str
     litellm_prefix: str
     base_url: str | None = None
+    url_suffix: str | None = None   # required path suffix for custom base URLs (e.g. "/v1")
     key_env_var: str | None = None
     connectivity_check: str | None = None
     group: str = "Cloud"
@@ -23,6 +24,7 @@ PROVIDERS: list[Provider] = [
         default_model="local-model",
         litellm_prefix="openai/",
         base_url="http://localhost:1234/v1",
+        url_suffix="/v1",
         connectivity_check="http://localhost:1234/v1/models",
         group="Local",
     ),
@@ -43,6 +45,7 @@ PROVIDERS: list[Provider] = [
         default_model="local-model",
         litellm_prefix="openai/",
         base_url="http://localhost:8080/v1",
+        url_suffix="/v1",
         connectivity_check="http://localhost:8080/v1/models",
         group="Local",
     ),
@@ -90,6 +93,7 @@ PROVIDERS: list[Provider] = [
         default_model="openai/qwen-plus",
         litellm_prefix="openai/",
         base_url="https://dashscope.aliyuncs.com/compatible-mode/v1",
+        url_suffix="/v1",
         key_env_var="DASHSCOPE_API_KEY",
         group="Cloud",
     ),