refactor(ollama)!: remove Ollama provider crate and implementation

Deletes the `owlen-ollama` Cargo.toml and source files, fully removing the Ollama provider from the workspace. This aligns the project with the MCP‑only architecture and eliminates direct provider dependencies.

crates/owlen-tui/src/ui.rs

@@ -1390,16 +1390,17 @@ fn render_model_selector(frame: &mut Frame<'_>, app: &ChatApp) {
                         .add_modifier(Modifier::BOLD),
                 ))
             }
-            ModelSelectorItemKind::Model {
-                provider: _,
-                model_index,
-            } => {
+            ModelSelectorItemKind::Model { model_index, .. } => {
                 if let Some(model) = app.model_info_by_index(*model_index) {
-                    let tool_indicator = if model.supports_tools { "🔧 " } else { "   " };
-                    let label = if model.name.is_empty() {
-                        format!("  {}{}", tool_indicator, model.id)
+                    let mut badges = Vec::new();
+                    if model.supports_tools {
+                        badges.push("🔧");
+                    }
+
+                    let label = if badges.is_empty() {
+                        format!("  {}", model.id)
                     } else {
-                        format!("  {}{} — {}", tool_indicator, model.id, model.name)
+                        format!("  {} - {}", model.id, badges.join(" "))
                     };
                     ListItem::new(Span::styled(
                         label,