feat: auto-detect ollama models

src-tauri/src/llm/ollama.rs

@@ -13,6 +13,40 @@ impl OllamaProvider {
     pub fn new(base_url: String) -> Self {
         Self { base_url }
     }
+
+    pub async fn get_models(base_url: &str) -> Result<Vec<String>, String> {
+        let client = reqwest::Client::new();
+        let url = format!("{}/api/tags", base_url.trim_end_matches('/'));
+
+        let res = client
+            .get(&url)
+            .send()
+            .await
+            .map_err(|e| format!("Request failed: {}", e))?;
+
+        if !res.status().is_success() {
+            let status = res.status();
+            let text = res.text().await.unwrap_or_default();
+            return Err(format!("Ollama API error {}: {}", status, text));
+        }
+
+        let body: OllamaTagsResponse = res
+            .json()
+            .await
+            .map_err(|e| format!("Failed to parse response: {}", e))?;
+
+        Ok(body.models.into_iter().map(|m| m.name).collect())
+    }
+}
+
+#[derive(Deserialize)]
+struct OllamaTagsResponse {
+    models: Vec<OllamaModelTag>,
+}
+
+#[derive(Deserialize)]
+struct OllamaModelTag {
+    name: String,
 }
 
 // --- Request Types ---