Touch interface for phones and tablets; category toolbar for mouse and touch

- touch.rs: gesture recognition (tap, double tap, long press, drag, two-finger pan/pinch/rotate)
- Touch mode: Auto (touch device or first touch) / On / Off in Settings -> Game
- Larger interface factor on touch screens, top bar wraps, smaller minimap, fewer messages
- Toolbar grouped into categories with pop-up rows and a menu button, also on the desktop
- Long press shows information or drops held units; double tap with the hand slaps
- Savegame name via the browser's text dialog when the name field is tapped
- Touch help texts (EN/DE)

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/menu.rs

@@ -40,6 +40,7 @@ pub enum Item {
     RenderScale,
     GameSpeed,
     Hints,
+    TouchUi,
 }
 
 fn tab_items(tab: usize) -> &'static [Item] {
@@ -48,7 +49,7 @@ fn tab_items(tab: usize) -> &'static [Item] {
         0 => &[Language, Volume, MusicVolume, Mute],
         1 => &[RotateSpeed, ZoomSpeed, EdgeScroll, InvertMouse],
         2 => &[Outlines, WallDetail, Lights, UiScale, RenderScale],
-        3 => &[GameSpeed, Hints],
+        3 => &[GameSpeed, Hints, TouchUi],
         _ => &[],
     }
 }
@@ -70,6 +71,7 @@ fn item_label(it: Item) -> String {
         Item::RenderScale => "set.render_scale",
         Item::GameSpeed => "set.game_speed",
         Item::Hints => "set.hints",
+        Item::TouchUi => "set.touch_ui",
     })
 }
 
@@ -108,6 +110,11 @@ fn item_value(it: Item, s: &Settings) -> String {
         Item::RenderScale => format!("1/{}", s.render_scale.max(1)),
         Item::GameSpeed => format!("{}x", s.game_speed as i32),
         Item::Hints => onoff(s.hints),
+        Item::TouchUi => match s.touch_ui {
+            1 => tr("val.on"),
+            2 => tr("val.off"),
+            _ => trf("val.auto_state", &[tr(if crate::ui::touch_ui() { "val.on" } else { "val.off" })]),
+        },
     }
 }
 
@@ -142,6 +149,7 @@ fn item_change(it: Item, s: &mut Settings, d: i32) {
         Item::RenderScale => s.render_scale = cycle(&(1u8..=16).collect::<Vec<u8>>(), s.render_scale.clamp(1, 16), d),
         Item::GameSpeed => s.game_speed = cycle(&[1.0f32, 2.0], s.game_speed, d),
         Item::Hints => s.hints = !s.hints,
+        Item::TouchUi => s.touch_ui = cycle(&[0u8, 1, 2], s.touch_ui, d),
     }
 }
 
@@ -176,6 +184,7 @@ enum Btn {
     Scroll(i32),
     FileSave,
     FileLoad,
+    NameField,
 }
 
 pub enum MenuAction {
@@ -194,6 +203,7 @@ pub enum MenuAction {
     CloudSave(Option<String>, String), // (id to overwrite, name)
     CloudLoad(String),
     CloudDelete(String),
+    EditName, // the name field was tapped (touch: ask with a browser dialog)
 }
 
 pub struct Menu {
@@ -364,6 +374,7 @@ impl Menu {
                 self.scroll_by(d * self.rows_visible.max(1) as i32, cloud.list.len());
                 MenuAction::Consumed
             }
+            Some(Btn::NameField) => MenuAction::EditName,
             Some(Btn::FileSave) => MenuAction::FileSave,
             Some(Btn::FileLoad) => MenuAction::FileLoad,
         }
@@ -599,6 +610,7 @@ impl Menu {
             let fw = (inner_w - (fx - inner_x) - bw - CW()).max(CW() * 8.0);
             draw_rectangle(fx, top, fw, CH() * 2.0, Color::new(0.02, 0.01, 0.02, 1.0));
             draw_rectangle_lines(fx, top, fw, CH() * 2.0, 2.0, FRAME_HI);
+            self.buttons.push((Rect::new(fx, top, fw, CH() * 2.0), Btn::NameField));
             let blink = if (get_time() * 2.0) as i64 % 2 == 0 { "_" } else { " " };
             let maxc = ((fw - CW() * 2.0) / CW()).max(1.0) as usize;
             let shown: String = {