feat: interactive /settings modal and quick /p persona command with fuzzy prefix matching

src/tui/app.rs

@@ -41,6 +41,7 @@ pub enum TuiMode {
     PipelineSelect,
     SessionSelect,
     ThemeSelect,
+    Settings,
 }
 
 #[derive(Debug, Clone)]
@@ -110,6 +111,10 @@ pub const ALL_COMMANDS: &[CommandSuggestion] = &[
         name: "/persona",
         description: "Select active persona or pass name",
     },
+    CommandSuggestion {
+        name: "/p",
+        description: "Quick switch persona (e.g. /p coder, /p next)",
+    },
     CommandSuggestion {
         name: "/pipeline",
         description: "Select active pipeline or pass name",
@@ -267,6 +272,9 @@ pub struct AppState {
     // Options
     pub allow_stealth: bool,
     pub escalate: bool,
+    pub complexity_threshold: u8,
+    pub tool_execution_enabled: bool,
+    pub selected_setting_idx: usize,
 
     // UX & Theme
     pub expand_tool_outputs: bool,
@@ -283,6 +291,7 @@ impl AppState {
         daily_limit: usize,
         config_dir: PathBuf,
         initial_theme: String,
+        complexity_threshold: u8,
     ) -> Self {
         let mut persona_items = Vec::new();
         // Item 0 is always the smart Auto-Router
@@ -334,6 +343,9 @@ impl AppState {
             tokens_out: 0,
             allow_stealth: false,
             escalate: false,
+            complexity_threshold,
+            tool_execution_enabled: true,
+            selected_setting_idx: 0,
             expand_tool_outputs: false,
             current_theme: initial_theme,
             selected_suggestion_idx: 0,
@@ -388,6 +400,59 @@ impl AppState {
         self.selected_persona_idx == 0
     }
 
+    pub fn cycle_persona(&mut self) {
+        if !self.persona_items.is_empty() {
+            self.selected_persona_idx = (self.selected_persona_idx + 1) % self.persona_items.len();
+            self.active_pipeline_for_prompt = None;
+        }
+    }
+
+    pub fn set_persona_by_name(&mut self, query: &str) -> Result<String, String> {
+        let q = query.trim().to_lowercase();
+        if q.is_empty() {
+            return Err("Persona name cannot be empty".to_string());
+        }
+
+        // Exact match
+        if let Some(pos) = self
+            .persona_items
+            .iter()
+            .position(|p| p.name.to_lowercase() == q)
+        {
+            self.selected_persona_idx = pos;
+            self.active_pipeline_for_prompt = None;
+            return Ok(self.current_persona_name().to_string());
+        }
+
+        // Prefix match
+        if let Some(pos) = self
+            .persona_items
+            .iter()
+            .position(|p| p.name.to_lowercase().starts_with(&q))
+        {
+            self.selected_persona_idx = pos;
+            self.active_pipeline_for_prompt = None;
+            return Ok(self.current_persona_name().to_string());
+        }
+
+        // Substring match
+        if let Some(pos) = self
+            .persona_items
+            .iter()
+            .position(|p| p.name.to_lowercase().contains(&q))
+        {
+            self.selected_persona_idx = pos;
+            self.active_pipeline_for_prompt = None;
+            return Ok(self.current_persona_name().to_string());
+        }
+
+        let names: Vec<String> = self.persona_items.iter().map(|p| p.name.clone()).collect();
+        Err(format!(
+            "No persona matching '{query}'. Available: {}",
+            names.join(", ")
+        ))
+    }
+
     pub fn log_working_event(&mut self, text: &str) {
         let now = chrono::Local::now().format("%H:%M:%S").to_string();
         self.workings.events.push(format!("{now} {text}"));
@@ -772,6 +837,7 @@ mod tests {
             50,
             PathBuf::from("/tmp/brokecrew_test"),
             "opencode".to_string(),
+            7,
         );
         assert!(app.is_start_screen());
 
@@ -798,6 +864,7 @@ mod tests {
             50,
             PathBuf::from("/tmp/brokecrew_test"),
             "opencode".to_string(),
+            7,
         );
         assert_eq!(app.current_theme, "opencode");
         app.cycle_theme();
@@ -824,6 +891,7 @@ mod tests {
             50,
             temp_dir.path().to_path_buf(),
             "opencode".to_string(),
+            7,
         );
         app.add_user_message("Hello from user".to_string());
         app.start_assistant_message("coder", "qwen-coder", Tier::Free);
@@ -838,4 +906,33 @@ mod tests {
         let json_path = app.export_active_session_json().expect("export json");
         assert!(json_path.exists());
     }
+
+    #[test]
+    fn test_persona_quick_switch() {
+        let personas = vec![
+            ("coder".to_string(), "coding assistant".to_string()),
+            ("reviewer".to_string(), "review assistant".to_string()),
+        ];
+        let mut app = AppState::new(
+            personas,
+            vec![],
+            20,
+            50,
+            PathBuf::from("/tmp/brokecrew_test"),
+            "opencode".to_string(),
+            7,
+        );
+        assert_eq!(app.current_persona_name(), "auto");
+
+        assert_eq!(app.set_persona_by_name("c").unwrap(), "coder");
+        assert_eq!(app.current_persona_name(), "coder");
+
+        assert_eq!(app.set_persona_by_name("rev").unwrap(), "reviewer");
+        assert_eq!(app.current_persona_name(), "reviewer");
+
+        assert_eq!(app.set_persona_by_name("auto").unwrap(), "auto");
+        assert_eq!(app.current_persona_name(), "auto");
+
+        assert!(app.set_persona_by_name("nonexistent").is_err());
+    }
 }

src/tui/mod.rs

@@ -132,6 +132,7 @@ pub async fn run_tui(
         daily_limit,
         config.config_dir.clone(),
         config.theme.clone(),
+        config.complexity_threshold,
     );
     app.allow_stealth = allow_stealth || config.allow_stealth;
     app.escalate = escalate;
@@ -561,11 +562,126 @@ async fn handle_key_event(
             _ => {}
         },
 
+        TuiMode::Settings => match key.code {
+            KeyCode::Esc => {
+                app.mode = TuiMode::Normal;
+            }
+            KeyCode::Up | KeyCode::Char('k') => {
+                app.selected_setting_idx = app.selected_setting_idx.saturating_sub(1);
+            }
+            KeyCode::Down | KeyCode::Char('j') => {
+                if app.selected_setting_idx + 1 < 7 {
+                    app.selected_setting_idx += 1;
+                }
+            }
+            KeyCode::Enter | KeyCode::Char(' ') => match app.selected_setting_idx {
+                0 => {
+                    app.cycle_theme();
+                    let theme_name = app.current_theme.clone();
+                    let _ = AppConfig::save_theme(&app.config_dir, &theme_name);
+                    app.log_working_event(&format!("[settings] theme switched to {theme_name}"));
+                }
+                1 => {
+                    app.allow_stealth = !app.allow_stealth;
+                    app.log_working_event(&format!(
+                        "[settings] stealth models: {}",
+                        app.allow_stealth
+                    ));
+                }
+                2 => {
+                    app.escalate = !app.escalate;
+                    app.log_working_event(&format!(
+                        "[settings] complexity escalate: {}",
+                        app.escalate
+                    ));
+                }
+                3 => {
+                    app.complexity_threshold = if app.complexity_threshold >= 10 {
+                        1
+                    } else {
+                        app.complexity_threshold + 1
+                    };
+                    app.log_working_event(&format!(
+                        "[settings] complexity threshold: {}",
+                        app.complexity_threshold
+                    ));
+                }
+                4 => {
+                    app.tool_execution_enabled = !app.tool_execution_enabled;
+                    app.log_working_event(&format!(
+                        "[settings] tool execution: {}",
+                        app.tool_execution_enabled
+                    ));
+                }
+                5 => {
+                    app.expand_tool_outputs = !app.expand_tool_outputs;
+                    app.log_working_event(&format!(
+                        "[settings] expand tool output: {}",
+                        app.expand_tool_outputs
+                    ));
+                }
+                6 => {
+                    app.cycle_persona();
+                    let persona = app.current_persona_name().to_string();
+                    app.log_working_event(&format!("[settings] persona set to {persona}"));
+                }
+                _ => {}
+            },
+            KeyCode::Left | KeyCode::Char('h') => match app.selected_setting_idx {
+                0 => {
+                    let current_pos = app::THEMES
+                        .iter()
+                        .position(|(name, _)| *name == app.current_theme)
+                        .unwrap_or(0);
+                    let prev_pos = if current_pos == 0 {
+                        app::THEMES.len() - 1
+                    } else {
+                        current_pos - 1
+                    };
+                    app.current_theme = app::THEMES[prev_pos].0.to_string();
+                    app.selected_theme_idx = prev_pos;
+                    let theme_name = app.current_theme.clone();
+                    let _ = AppConfig::save_theme(&app.config_dir, &theme_name);
+                    app.log_working_event(&format!("[settings] theme switched to {theme_name}"));
+                }
+                3 if app.complexity_threshold > 1 => {
+                    app.complexity_threshold -= 1;
+                    app.log_working_event(&format!(
+                        "[settings] complexity threshold: {}",
+                        app.complexity_threshold
+                    ));
+                }
+                _ => {}
+            },
+            KeyCode::Right | KeyCode::Char('l') => match app.selected_setting_idx {
+                0 => {
+                    app.cycle_theme();
+                    let theme_name = app.current_theme.clone();
+                    let _ = AppConfig::save_theme(&app.config_dir, &theme_name);
+                    app.log_working_event(&format!("[settings] theme switched to {theme_name}"));
+                }
+                3 if app.complexity_threshold < 10 => {
+                    app.complexity_threshold += 1;
+                    app.log_working_event(&format!(
+                        "[settings] complexity threshold: {}",
+                        app.complexity_threshold
+                    ));
+                }
+                _ => {}
+            },
+            _ => {}
+        },
+
         TuiMode::Normal => {
             // Mode switching and shortcuts
             if key.modifiers.contains(KeyModifiers::CONTROL) {
                 app.esc_pressed_at = None;
                 match key.code {
+                    KeyCode::Char(',') => {
+                        app.selected_setting_idx = 0;
+                        app.mode = TuiMode::Settings;
+                        return false;
+                    }
                     KeyCode::Char('p') => {
                         app.mode = TuiMode::PipelineSelect;
                         return false;
@@ -961,13 +1077,8 @@ async fn handle_slash_command(
             app.mode = TuiMode::ThemeSelect;
         }
         "/settings" => {
-            app.add_system_message(format!(
-                "Runtime Settings:\n  Stealth Models:       {} (toggle with /stealth)\n  Complexity Escalate:  {} (toggle with /escalate)\n  Active Persona:       {}\n  Active Pipeline:      {}",
-                if app.allow_stealth { "enabled" } else { "disabled" },
-                if app.escalate { "enabled" } else { "disabled" },
-                app.current_persona_name(),
-                app.active_pipeline_for_prompt.as_deref().unwrap_or("none")
-            ));
+            app.selected_setting_idx = 0;
+            app.mode = TuiMode::Settings;
         }
         "/stealth" => {
             app.allow_stealth = !app.allow_stealth;
@@ -990,26 +1101,25 @@ async fn handle_slash_command(
         "/clear" => {
             app.clear_chat();
         }
-        "/persona" | "/personas" => {
+        "/p" | "/persona" | "/personas" => {
             if let Some(target) = parts.get(1) {
-                let target_lower = target.to_lowercase();
-                if let Some(pos) = app
-                    .persona_items
-                    .iter()
-                    .position(|p| p.name.to_lowercase() == target_lower)
-                {
-                    app.selected_persona_idx = pos;
-                    app.active_pipeline_for_prompt = None;
+                if target.eq_ignore_ascii_case("next") {
+                    app.cycle_persona();
                     let persona_name = app.current_persona_name().to_string();
                     app.add_system_message(format!("Switched active persona to: {persona_name}"));
                     app.log_working_event(&format!("[persona] switched to {persona_name}"));
                 } else {
-                    let available: Vec<String> =
-                        app.persona_items.iter().map(|p| p.name.clone()).collect();
-                    app.add_system_message(format!(
-                        "Persona '{target}' not found. Available personas:\n  {}",
-                        available.join(", ")
-                    ));
+                    match app.set_persona_by_name(target) {
+                        Ok(persona_name) => {
+                            app.add_system_message(format!(
+                                "Switched active persona to: {persona_name}"
+                            ));
+                            app.log_working_event(&format!("[persona] switched to {persona_name}"));
+                        }
+                        Err(e) => {
+                            app.add_system_message(format!("! {e}"));
+                        }
+                    }
                 }
             } else {
                 app.mode = TuiMode::PersonaSelect;
@@ -1067,6 +1177,7 @@ fn spawn_dispatch_task(
     let direct_persona = app.current_persona_name().to_string();
     let allow_stealth = app.allow_stealth;
     let escalate = app.escalate;
+    let tool_execution_enabled = app.tool_execution_enabled;
 
     let persona_registry = config.persona_registry.clone();
     let pipelines = config.pipelines.clone();
@@ -1319,7 +1430,11 @@ fn spawn_dispatch_task(
 
         match res {
             Ok(disp) => {
-                let commands = ToolEngine::extract_command_calls(&disp.reply);
+                let commands = if tool_execution_enabled {
+                    ToolEngine::extract_command_calls(&disp.reply)
+                } else {
+                    Vec::new()
+                };
                 if !commands.is_empty() {
                     let mut tool_results_summary = String::new();
                     for cmd in commands {

src/tui/ui.rs

@@ -138,6 +138,7 @@ pub fn render(frame: &mut Frame, app: &mut AppState) {
         TuiMode::PipelineSelect => render_pipeline_popup(frame, app, &palette),
         TuiMode::SessionSelect => render_session_popup(frame, app, &palette),
         TuiMode::ThemeSelect => render_theme_popup(frame, app, &palette),
+        TuiMode::Settings => render_settings_popup(frame, app, &palette),
         TuiMode::Normal => {}
     }
 }
@@ -1548,6 +1549,119 @@ fn render_theme_popup(frame: &mut Frame, app: &AppState, palette: &ThemePalette)
     frame.render_widget(list, area);
 }
 
+fn render_settings_popup(frame: &mut Frame, app: &AppState, palette: &ThemePalette) {
+    let area = centered_rect(68, 62, frame.area());
+    frame.render_widget(Clear, area);
+
+    let setting_items = [
+        (
+            "● Active Theme",
+            format!("{:<14} (enter/left/right cycle)", app.current_theme),
+        ),
+        (
+            "● Stealth Candidates",
+            if app.allow_stealth {
+                "[ENABLED]  (experimental free models included)".to_string()
+            } else {
+                "[DISABLED] (only catalog models)".to_string()
+            },
+        ),
+        (
+            "● Complexity Escalation",
+            if app.escalate {
+                "[ENABLED]  (escalate to paid on heavy tasks)".to_string()
+            } else {
+                "[DISABLED] (always prefer free models)".to_string()
+            },
+        ),
+        ("● Complexity Threshold", {
+            let filled = (app.complexity_threshold as usize).min(10);
+            let empty = 10 - filled;
+            format!(
+                "[{}{}] {} / 10 (left/right adjust)",
+                "■".repeat(filled),
+                "□".repeat(empty),
+                app.complexity_threshold
+            )
+        }),
+        (
+            "● Local Tool Execution",
+            if app.tool_execution_enabled {
+                "[AUTO-EXECUTE] (run <run> commands locally)".to_string()
+            } else {
+                "[DISABLED]     (commands rendered only)".to_string()
+            },
+        ),
+        (
+            "● Tool Output View",
+            if app.expand_tool_outputs {
+                "[EXPANDED]  (full stdout/stderr shown)".to_string()
+            } else {
+                "[COLLAPSED] (compact with ctrl+o expand)".to_string()
+            },
+        ),
+        (
+            "● Active Persona",
+            format!("{:<14} (enter/space to cycle)", app.current_persona_name()),
+        ),
+    ];
+
+    let items: Vec<ListItem> = setting_items
+        .iter()
+        .enumerate()
+        .map(|(idx, (name, val))| {
+            let is_selected = idx == app.selected_setting_idx;
+            let prefix = if is_selected { "→ " } else { "  " };
+
+            let line = Line::from(vec![
+                Span::styled(
+                    prefix,
+                    if is_selected {
+                        Style::default().fg(palette.accent).bold()
+                    } else {
+                        Style::default().fg(Color::DarkGray)
+                    },
+                ),
+                Span::styled(
+                    format!("{:<26} ", name),
+                    if is_selected {
+                        Style::default().fg(palette.accent).bold()
+                    } else {
+                        Style::default().fg(palette.text_bright)
+                    },
+                ),
+                Span::styled(
+                    val.clone(),
+                    if is_selected {
+                        Style::default().fg(palette.text_bright).bold()
+                    } else {
+                        Style::default().fg(palette.text_muted)
+                    },
+                ),
+            ]);
+
+            if is_selected {
+                ListItem::new(line).style(Style::default().bg(Color::Rgb(32, 38, 54)))
+            } else {
+                ListItem::new(line)
+            }
+        })
+        .collect();
+
+    let list = List::new(items).block(
+        Block::default()
+            .borders(Borders::ALL)
+            .border_type(BorderType::Rounded)
+            .border_style(Style::default().fg(palette.accent))
+            .title(Span::styled(
+                " settings [up/down navigate, enter/space toggle, left/right adjust, esc close] ",
+                Style::default().fg(palette.accent).bold(),
+            )),
+    );
+
+    frame.render_widget(list, area);
+}
+
 fn get_persona_color(name: &str) -> Color {
     match name.to_lowercase().as_str() {
         "coder" => Color::LightGreen,