Add Ollama model selector dropdown and improve automatic tool detection

- Add `listModels()`, `setModel()`, and `getModel()` methods to `OllamaClient`
- Populate model dropdown in chat view from `/api/tags` endpoint
- Synchronize model selection across main and agent clients
- Detect user intent for vault operations from message content
- Expand action phrase matching for `shouldAutoRunReadTools()`
- Streamline retry logic and suppress "Let me..." text with actual tool calls
- Improve fallback search query generation by removing more filler words

styles.css

@@ -314,6 +314,25 @@
   border-color: var(--interactive-accent);
 }
 
+/* Model Selector */
+.ollama-model-selector {
+  padding: var(--size-4-1) var(--size-4-2);
+  border-radius: var(--ollama-radius);
+  border: 1px solid var(--ollama-border);
+  background-color: var(--background-modifier-form-field);
+  color: var(--text-normal);
+  font-size: var(--font-ui-small);
+  cursor: pointer;
+  max-width: 10rem;
+  overflow: hidden;
+  text-overflow: ellipsis;
+}
+
+.ollama-model-selector:focus {
+  outline: none;
+  border-color: var(--interactive-accent);
+}
+
 /* Chat History Selector */
 .ollama-history-selector {
   padding: var(--size-4-1) var(--size-4-2);