Pixel-art mouse pointers and hand actions

- pointing monster hand with the active tool's icon, grabbing hand / fist, animated backhand and punch
- active tool highlighted in the toolbar (pulsing frame, arrow)
- hand: pick up unconscious heroes on own ground, drop prisoners anywhere on own ground
  (onto a free torture place = locked up), Shift+click backhand (speed-up) / punch (stun)
- fix: hint slots overflowed with the new hints; hint times are no longer saved
- test for the hand rules

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

src/gfx.rs

@@ -52,6 +52,7 @@ pub const D_ALTAR: u32 = 88;
 pub struct Gfx {
     pub atlas: Texture2D,
     pub sprites: Texture2D,
+    pub cursors: Texture2D, // mouse pointer frames, 16x16 each (see CURSOR_*)
     pub font: Texture2D, // DINOBYTE, CP437, 16x16 glyphs of 6x8 px
 }
 
@@ -746,6 +747,109 @@ fn gen_sprites() -> Image {
     img
 }
 
+// ------------------------------------------------------------------ mouse pointers (16x16)
+
+pub const CURSOR_POINT: u32 = 0; // pointing monster hand (hot spot: finger tip)
+pub const CURSOR_OPEN: u32 = 1; // open grabbing hand (hot spot: palm centre)
+pub const CURSOR_FIST: u32 = 2; // holding something
+pub const CURSOR_BACKHAND: u32 = 3; // slap, with motion streaks
+pub const CURSOR_PUNCH: u32 = 4; // punch, with impact star
+pub const CURSOR_HOT: [(f32, f32); 5] = [(2.0, 1.0), (7.0, 7.0), (7.0, 7.0), (7.0, 7.0), (7.0, 7.0)];
+
+const CUR_POINT: [&str; 16] = [
+    "..kk............",
+    ".kwwk...........",
+    ".kggk...........",
+    ".kggk...........",
+    ".kggkkk.........",
+    ".kggkggkkk......",
+    ".kggkggkggkk....",
+    "kkggggggggggk...",
+    "kgkgggggggggk...",
+    "kggggggggggGk...",
+    ".kgggggggggGk...",
+    "..kggggggggGk...",
+    "..kgggggggGk....",
+    "...kGGGGGGk.....",
+    "...kkkkkkkk.....",
+    "................",
+];
+const CUR_OPEN: [&str; 16] = [
+    "................",
+    ".kw.kw.kw.......",
+    ".kgkkgkkgk..kw..",
+    ".kgkkgkkgk.kgk..",
+    ".kgkkgkkgkkggk..",
+    ".kgggggggggggk..",
+    "kkgggggggggggk..",
+    "kgkggggggggggk..",
+    "kggkgggggggGk...",
+    ".kggggggggggk...",
+    "..kgggggggGk....",
+    "...kggggggGk....",
+    "...kgggggGk.....",
+    "....kGGGGk......",
+    "....kkkkkk......",
+    "................",
+];
+const CUR_FIST: [&str; 16] = [
+    "................",
+    "................",
+    "................",
+    "...kkkkkkkk.....",
+    "..kgkgkgkgGk....",
+    "..kgkgkgkgGk....",
+    ".kkggggggggGk...",
+    "kggkgggggggGk...",
+    "kgggggggggGGk...",
+    ".kggggggggGk....",
+    "..kgggggggGk....",
+    "...kggggggGk....",
+    "...kGGGGGGk.....",
+    "....kkkkkk......",
+    "................",
+    "................",
+];
+
+fn cursor_pal(ch: char) -> Option<Color> {
+    Some(match ch {
+        'k' => c(20, 16, 18),
+        'g' => c(112, 152, 84),
+        'G' => c(70, 100, 56),
+        'w' => c(236, 230, 208),
+        'y' => c(255, 220, 80),
+        's' => c(255, 255, 255),
+        _ => return None,
+    })
+}
+
+fn gen_cursors() -> Image {
+    let mut img = Image::gen_image_color(16 * 5, 16, Color::new(0.0, 0.0, 0.0, 0.0));
+    let mut put = |frame: u32, rows: &[&str; 16], mirror: bool| {
+        for (y, row) in rows.iter().enumerate() {
+            for (x, ch) in row.chars().enumerate() {
+                if let Some(col) = cursor_pal(ch) {
+                    let xx = if mirror { 15 - x } else { x };
+                    img.set_pixel(frame * 16 + xx as u32, y as u32, col);
+                }
+            }
+        }
+    };
+    put(CURSOR_POINT, &CUR_POINT, false);
+    put(CURSOR_OPEN, &CUR_OPEN, false);
+    put(CURSOR_FIST, &CUR_FIST, false);
+    put(CURSOR_BACKHAND, &CUR_OPEN, true);
+    put(CURSOR_PUNCH, &CUR_FIST, false);
+    // motion streaks for the backhand, impact star for the punch
+    for &(x, y) in &[(0, 5), (1, 5), (0, 7), (1, 7), (2, 7), (0, 9), (1, 9)] {
+        img.set_pixel(CURSOR_BACKHAND * 16 + x, y, c(255, 255, 255));
+    }
+    for &(x, y) in &[(0, 0), (2, 1), (1, 2), (0, 3), (3, 0), (4, 2), (2, 4)] {
+        img.set_pixel(CURSOR_PUNCH * 16 + x, y, c(255, 220, 80));
+    }
+    img
+}
+
 impl Gfx {
     pub fn new() -> Gfx {
         let atlas = Texture2D::from_image(&gen_atlas());
@@ -760,7 +864,9 @@ impl Gfx {
         }
         let font = Texture2D::from_image(&img);
         font.set_filter(FilterMode::Nearest);
-        Gfx { atlas, sprites, font }
+        let cursors = Texture2D::from_image(&gen_cursors());
+        cursors.set_filter(FilterMode::Nearest);
+        Gfx { atlas, sprites, cursors, font }
     }
 
     pub fn cell(id: u32) -> Rect {