Built-in settings dialog opened from a panel gear button

- New spawn_settings action + '≡ Inställningar' button in the default
  panel (≡ instead of ⚙ which has ambiguous character width): opens a
  singleton settings window
- Rows: theme (cycles built-in + themes/*.toml), panel (cycles
  panels/*.toml), shadow and scrollbar toggles — keyboard (arrows/
  Enter/Esc) and mouse (click selects, click again activates)
- Shows where config.toml, themes/ and panels/ live
- Changes apply immediately and persist to config.toml via toml_edit;
  the hot-reload watcher picks up the file writes for panels
- README and --help updated with switcher/snap/copy-mode/theme docs
- Integration suite: 30/30 (gear click, dialog opens, shadow toggle
  persisted to config.toml)

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

src/app.rs

@@ -301,6 +301,11 @@ pub enum WindowContent {
         input: String,
         cursor_pos: usize,
     },
+    /// Inbyggd inställningsdialog (tema, panel, skugga, scrollbar)
+    Settings {
+        /// Markerad rad (0=tema, 1=panel, 2=skugga, 3=scrollbar)
+        selected: usize,
+    },
     PopupDialog {
         message: String,
         buttons: Vec<String>,
@@ -709,6 +714,7 @@ impl App {
             WindowContent::Terminal { alive, .. } => *alive,
             WindowContent::RunDialog { .. } => true,
             WindowContent::PopupDialog { .. } => true,
+            WindowContent::Settings { .. } => true,
         });
         let alive_ids: Vec<usize> = self.windows.iter().map(|w| w.id).collect();
         self.focus_history.retain(|h| alive_ids.contains(h));
@@ -832,6 +838,16 @@ impl App {
             }
         }
 
+        // 2a2. Inställningsdialogen hanterar sina egna tangenter
+        if let Some(id) = self.focused_id {
+            let is_settings = self.windows.iter()
+                .any(|w| w.id == id && matches!(w.content, WindowContent::Settings { .. }));
+            if is_settings {
+                self.handle_settings_key(id, key);
+                return;
+            }
+        }
+
         // 2b. PopupDialog hanterar sina egna tangenter
         if let Some(id) = self.focused_id {
             let is_popup = self
@@ -1275,6 +1291,34 @@ impl App {
             return;
         }
 
+        // 4b. Klick i inställningsdialogen: välj rad, aktivera vid andra klicket
+        let settings_hit = self
+            .windows
+            .iter()
+            .rev()
+            .find(|w| w.in_content(col, row) && matches!(w.content, WindowContent::Settings { .. }))
+            .map(|w| (w.id, w.content_rect()));
+        if let Some((id, cr)) = settings_hit {
+            self.focus_window(id);
+            // rad 1..=4 i innehållet motsvarar inställningsrad 0..=3
+            let rel = row.saturating_sub(cr.y);
+            if (1..=4).contains(&rel) {
+                let target = (rel - 1) as usize;
+                let mut activate = false;
+                if let Some(WindowContent::Settings { selected }) = self.settings_content(id) {
+                    if *selected == target {
+                        activate = true;
+                    } else {
+                        *selected = target;
+                    }
+                }
+                if activate {
+                    self.settings_activate(id, true);
+                }
+            }
+            return;
+        }
+
         // 5. Innehållsyta → fokus + vidarebefordra musklick till terminal
         let hit = self.windows.iter().rev().find(|w| w.in_content(col, row)).map(|w| {
             let (mode, encoding) = match &w.content {
@@ -1429,6 +1473,7 @@ impl App {
             MenuAction::Submenu { .. } => {}
             MenuAction::WindowSwitcher => self.switcher_open_or_advance(),
             MenuAction::CopyMode => self.enter_copy_mode(),
+            MenuAction::SpawnSettings => self.spawn_settings(),
             MenuAction::SnapLeft => self.snap_focused(true),
             MenuAction::SnapRight => self.snap_focused(false),
             MenuAction::Maximize => self.toggle_maximize_focused(),
@@ -1657,6 +1702,132 @@ impl App {
         id
     }
 
+    /// Öppna inställningsdialogen (eller fokusera en redan öppen).
+    fn spawn_settings(&mut self) {
+        if let Some(w) = self.windows.iter().find(|w| matches!(w.content, WindowContent::Settings { .. })) {
+            let id = w.id;
+            self.focus_window(id);
+            return;
+        }
+        let ca = self.content_area;
+        let w = 62u16.min(ca.width.saturating_sub(2));
+        let h = 13u16.min(ca.height.saturating_sub(2));
+        let x = ca.x as i32 + ((ca.width.saturating_sub(w)) / 2) as i32;
+        let y = ca.y as i32 + ((ca.height.saturating_sub(h)) / 2) as i32;
+        let id = self.next_id;
+        self.next_id += 1;
+        self.windows.push(FloatingWindow {
+            id,
+            x,
+            y,
+            width: w,
+            height: h,
+            content: WindowContent::Settings { selected: 0 },
+            dragging: None,
+            resizing: None,
+            resizable: false,
+            mouse_mode: vt100::MouseProtocolMode::None,
+            mouse_encoding: vt100::MouseProtocolEncoding::Default,
+            mouse_seq_carry: Vec::new(),
+            selection: None,
+            kitty_gfx_carry: Vec::new(),
+            pending_graphics: Vec::new(),
+            scrollback_total: 0,
+            prev_geom: None,
+        });
+        self.focus_window(id);
+    }
+
+    fn handle_settings_key(&mut self, id: usize, key: KeyEvent) {
+        const ROWS: usize = 4;
+        match key.code {
+            KeyCode::Esc | KeyCode::Char('q') => self.close_window(id),
+            KeyCode::Up => {
+                if let Some(WindowContent::Settings { selected }) = self.settings_content(id) {
+                    *selected = (*selected + ROWS - 1) % ROWS;
+                }
+            }
+            KeyCode::Down | KeyCode::Tab => {
+                if let Some(WindowContent::Settings { selected }) = self.settings_content(id) {
+                    *selected = (*selected + 1) % ROWS;
+                }
+            }
+            KeyCode::Right | KeyCode::Enter | KeyCode::Char(' ') => self.settings_activate(id, true),
+            KeyCode::Left => self.settings_activate(id, false),
+            _ => {}
+        }
+    }
+
+    fn settings_content(&mut self, id: usize) -> Option<&mut WindowContent> {
+        self.windows.iter_mut().find(|w| w.id == id).map(|w| &mut w.content)
+    }
+
+    /// Lista *.toml i en katalog (relativa sökvägar, sorterade).
+    fn list_toml(dir: &str) -> Vec<String> {
+        let mut out: Vec<String> = std::fs::read_dir(dir)
+            .map(|rd| {
+                rd.filter_map(|e| e.ok())
+                    .filter(|e| e.path().extension().is_some_and(|x| x == "toml"))
+                    .map(|e| format!("{}/{}", dir, e.file_name().to_string_lossy()))
+                    .collect()
+            })
+            .unwrap_or_default();
+        out.sort();
+        out
+    }
+
+    /// Aktivera/cykla den markerade inställningsraden.
+    /// Ändringar skrivs till config.toml — hot-reload plockar upp dem
+    /// direkt, men tema/flaggor appliceras även omedelbart i minnet.
+    fn settings_activate(&mut self, id: usize, forward: bool) {
+        let Some(WindowContent::Settings { selected }) = self.settings_content(id) else { return };
+        let row = *selected;
+        match row {
+            0 => {
+                // Tema: cykla inbyggt + themes/*.toml
+                let mut options: Vec<Option<String>> = vec![None];
+                options.extend(Self::list_toml("themes").into_iter().map(Some));
+                let cur = options
+                    .iter()
+                    .position(|o| o.as_deref() == self.config.theme.as_deref())
+                    .unwrap_or(0);
+                let next = if forward {
+                    (cur + 1) % options.len()
+                } else {
+                    (cur + options.len() - 1) % options.len()
+                };
+                self.config.theme = options[next].clone();
+                self.theme = Theme::load_or_default(self.config.theme.as_deref());
+                let _ = Config::save_top_level_str("config.toml", "theme", self.config.theme.as_deref());
+            }
+            1 => {
+                // Panel: cykla panels/*.toml för panel 0
+                let options = Self::list_toml("panels");
+                if options.is_empty() || self.config.panels.is_empty() {
+                    return;
+                }
+                let cur_file = self.config.panels[0].file.clone().unwrap_or_default();
+                let cur = options.iter().position(|o| *o == cur_file).unwrap_or(0);
+                let next = if forward {
+                    (cur + 1) % options.len()
+                } else {
+                    (cur + options.len() - 1) % options.len()
+                };
+                let _ = Config::save_panel_file("config.toml", 0, &options[next]);
+                // panel-innehållet läses om av hot-reloaden
+            }
+            2 => {
+                self.config.shadow = !self.config.shadow;
+                let _ = Config::save_top_level_bool("config.toml", "shadow", self.config.shadow);
+            }
+            3 => {
+                self.config.show_scrollbar = !self.config.show_scrollbar;
+                let _ = Config::save_top_level_bool("config.toml", "show_scrollbar", self.config.show_scrollbar);
+            }
+            _ => {}
+        }
+    }
+
     /// Gå in i copy-mode för det fokuserade terminalfönstret.
     fn enter_copy_mode(&mut self) {
         let Some(id) = self.focused_id else { return };
@@ -2232,6 +2403,7 @@ fn action_display(action: &MenuAction) -> &'static str {
         MenuAction::SpawnRunDialog => "Kommandodialog",
         MenuAction::WindowSwitcher => "Fönsterväxlare",
         MenuAction::CopyMode => "Copy-mode",
+        MenuAction::SpawnSettings => "Inställningar",
         MenuAction::SnapLeft => "Fäst vänster",
         MenuAction::SnapRight => "Fäst höger",
         MenuAction::Maximize => "Maximera/återställ",

src/config.rs

@@ -125,6 +125,8 @@ pub enum MenuAction {
     Maximize,
     /// Copy-mode: bläddra/söka i fokuserat fönsters historik
     CopyMode,
+    /// Öppnar den inbyggda inställningsdialogen
+    SpawnSettings,
     /// Gör ingenting – används för display-only rader i menyer
     NoOp,
 }
@@ -271,6 +273,44 @@ impl Config {
         }
     }
 
+    /// Sätt/ta bort en toppnivå-strängnyckel i config-filen (TOML).
+    pub fn save_top_level_str(path: &str, key: &str, val: Option<&str>) -> anyhow::Result<()> {
+        let content = fs::read_to_string(path).unwrap_or_default();
+        let mut doc: toml_edit::DocumentMut = content.parse().unwrap_or_default();
+        match val {
+            Some(v) => {
+                doc[key] = toml_edit::value(v);
+            }
+            None => {
+                doc.remove(key);
+            }
+        }
+        fs::write(path, doc.to_string())?;
+        Ok(())
+    }
+
+    /// Sätt en toppnivå-boolnyckel i config-filen (TOML).
+    pub fn save_top_level_bool(path: &str, key: &str, val: bool) -> anyhow::Result<()> {
+        let content = fs::read_to_string(path).unwrap_or_default();
+        let mut doc: toml_edit::DocumentMut = content.parse().unwrap_or_default();
+        doc[key] = toml_edit::value(val);
+        fs::write(path, doc.to_string())?;
+        Ok(())
+    }
+
+    /// Sätt fil-referensen för panel nummer `index` i config-filen.
+    pub fn save_panel_file(path: &str, index: usize, file: &str) -> anyhow::Result<()> {
+        let content = fs::read_to_string(path).unwrap_or_default();
+        let mut doc: toml_edit::DocumentMut = content.parse().unwrap_or_default();
+        if let Some(arr) = doc.get_mut("panel").and_then(|p| p.as_array_of_tables_mut()) {
+            if let Some(tbl) = arr.get_mut(index) {
+                tbl["file"] = toml_edit::value(file);
+            }
+        }
+        fs::write(path, doc.to_string())?;
+        Ok(())
+    }
+
     /// Uppdatera background_image i config-filen (TOML)
     pub fn save_background(path: &str, image_path: Option<&str>) -> anyhow::Result<()> {
         let content = fs::read_to_string(path).unwrap_or_default();

src/main.rs

@@ -97,8 +97,18 @@ KONFIGURATION (./config.toml + panels/*.toml):
 TANGENTER (standard, ändras via [[keybind]] i config.toml):
     ctrl+space    Kommandodialog — skriv t.ex. `htop` och tryck Enter
     alt+enter     Ny terminal
+    alt+tab/alt+w Fönsterväxlare (MRU) — Tab stegar, Enter väljer
+    alt+left/right  Fäst fönster som vänster/höger halvskärm
+    alt+up        Maximera/återställ (även dubbelklick på titelraden)
+    alt+c         Copy-mode: bläddra/söka i historiken (/ n N q)
     ctrl+q        Avsluta (från en ansluten klient: kopplar bara ner den)
 
+TEMA & INSTÄLLNINGAR:
+    theme = \"themes/dark.toml\" i config.toml väljer tema (egna teman =
+    egna TOML-filer). Kugghjulet ≡ i panelen öppnar inbyggda
+    inställningar (tema, panel, skugga, scrollbar). config.toml,
+    panel- och temafiler hot-reloadas när de ändras.
+
 MUS:
     Dra titelraden = flytta fönster    Dra kant/hörn = ändra storlek
     Scroll = historik (skal) eller vidarebefordras (appar med mus-stöd)
@@ -491,6 +501,7 @@ fn handle_ipc_event(
                                 WindowContent::PopupDialog { message, .. } => {
                                     format!("[Popup: {}]", &message[..message.len().min(20)])
                                 }
+                                WindowContent::Settings { .. } => "[Inställningar]".to_string(),
                             };
                             Some(WindowInfo {
                                 id: w.id,

src/render.rs

@@ -77,6 +77,7 @@ fn render_switcher(frame: &mut Frame, app: &App, sw: &crate::app::SwitcherState)
                     }
                     WindowContent::RunDialog { .. } => "Kommandodialog".to_string(),
                     WindowContent::PopupDialog { .. } => "Popup".to_string(),
+                    WindowContent::Settings { .. } => "Inställningar".to_string(),
                 })
                 .unwrap_or_else(|| format!("fönster {}", id))
         })
@@ -298,6 +299,7 @@ fn render_window(frame: &mut Frame, window: &FloatingWindow, app: &App) {
         WindowContent::Terminal { title, .. } => format!(" {} ", title),
         WindowContent::RunDialog { .. } => " Tui-run ".to_string(),
         WindowContent::PopupDialog { .. } => " TUI-WM ".to_string(),
+        WindowContent::Settings { .. } => " Inställningar ".to_string(),
     };
 
     // Diskret skugga nedanför/till höger om fönstret (inte när en
@@ -386,6 +388,9 @@ fn render_window(frame: &mut Frame, window: &FloatingWindow, app: &App) {
         WindowContent::PopupDialog { .. } => {
             render_popup_dialog(frame, window, focused_id, th);
         }
+        WindowContent::Settings { selected } => {
+            render_settings_content(frame, cr, *selected, app, th);
+        }
     }
 
     // Copy-mode: statusrad + markering av sökträffar
@@ -506,6 +511,71 @@ fn highlight_matches(frame: &mut Frame, rect: Rect, query: &str, style: Style) {
     }
 }
 
+/// Innehållet i inställningsdialogen: interaktiva rader + info-sektion.
+fn render_settings_content(
+    frame: &mut Frame,
+    area: Rect,
+    selected: usize,
+    app: &App,
+    th: &crate::theme::Theme,
+) {
+    let theme_name = app.config.theme.as_deref().unwrap_or("(inbyggt)");
+    let panel_name = app
+        .config
+        .panels
+        .first()
+        .and_then(|p| p.file.as_deref())
+        .unwrap_or("(inline)");
+    let onoff = |b: bool| if b { "[x] på " } else { "[ ] av " };
+    let rows: Vec<(String, String)> = vec![
+        ("Tema".to_string(), format!("‹ {} ›", theme_name)),
+        ("Panel".to_string(), format!("‹ {} ›", panel_name)),
+        ("Skugga".to_string(), onoff(app.config.shadow).to_string()),
+        ("Scrollbar".to_string(), onoff(app.config.show_scrollbar).to_string()),
+    ];
+
+    let mut y = area.y + 1;
+    for (i, (label, value)) in rows.iter().enumerate() {
+        if y >= area.y + area.height {
+            break;
+        }
+        let style = if i == selected {
+            th.hover_highlight()
+        } else {
+            Style::default().fg(th.text).bg(Color::Black)
+        };
+        let line = format!(" {:<11}{}", format!("{}:", label), value);
+        frame.render_widget(
+            Paragraph::new(Span::styled(format!("{:<width$}", line, width = area.width as usize), style)),
+            Rect::new(area.x, y, area.width, 1),
+        );
+        y += 1;
+    }
+
+    // Info-sektion: var filerna finns
+    let config_path = std::fs::canonicalize("config.toml")
+        .map(|p| p.to_string_lossy().to_string())
+        .unwrap_or_else(|_| "config.toml".to_string());
+    let info = [
+        String::new(),
+        format!(" Config:  {}", config_path),
+        " Teman:   ./themes/*.toml".to_string(),
+        " Paneler: ./panels/*.toml".to_string(),
+        String::new(),
+        " ↑↓ välj   ←/→/Enter ändra   Esc stäng".to_string(),
+    ];
+    for line in info.iter() {
+        if y >= area.y + area.height {
+            break;
+        }
+        frame.render_widget(
+            Paragraph::new(Span::styled(line.clone(), Style::default().fg(th.hint))),
+            Rect::new(area.x, y, area.width, 1),
+        );
+        y += 1;
+    }
+}
+
 fn render_popup_dialog(
     frame: &mut Frame,
     window: &FloatingWindow,