v4.1.1: pointer-first betting and visible payouts in the GUI

The felt snaps the hover to the shared fine lattice: inner half of a cell is a straight, an edge a split, a crossing a corner. A translucent chip previews the target and the covered cells tint. Left click adds the selected chip, right or middle click takes one back through the new Bets::reduce; C or CLEAR empties the slip, and SPIN stays disabled with no chips.

The result now pays out: the wheel leaves the winning pocket under the pointer, the winning cell and pocket get a gold outline, and the sidebar reports the amount returned and the net for the round (NO WIN on a loss). Placing a chip after a result starts the next round without losing the wheel position.

The column row now spans the full width like a real table instead of hugging the left edge. Adds tests for lattice snapping, target naming and taking chips back.

1 files changed, 6 insertions, 2 deletions

diff --git a/src/client/games/roulette.rs b/src/client/games/roulette.rs
index ec9573c..f0ed816 100644
--- a/src/client/games/roulette.rs
+++ b/src/client/games/roulette.rs
@@ -95,7 +95,7 @@ impl Cursor {
     pub fn target(&self) -> Option<BetTarget> {
         match self {
             Cursor::Zero => Some(BetTarget::Straight { number: 0 }),
-            Cursor::Lattice { x, y } => felt_target(*x, *y),
+            Cursor::Lattice { x, y } => target_at(*x, *y),
             Cursor::Dozen(index) => Some(BetTarget::Dozen {
                 index: *index as u8,
             }),
@@ -171,7 +171,11 @@ fn cell_number(column: usize, row: usize) -> Option<u8> {
 }
 
 /// Bet under a point of the fine grid.
-fn felt_target(x: usize, y: usize) -> Option<BetTarget> {
+///
+/// Both frontends use this: the terminal moves a cursor over the lattice, and
+/// the GUI snaps a mouse position to it. Odd coordinates are cell centres,
+/// even coordinates are the lines where a split or corner chip sits.
+pub fn target_at(x: usize, y: usize) -> Option<BetTarget> {
     if !(1..=FELT_X_MAX).contains(&x) || !(1..=FELT_Y_MAX).contains(&y) {
         return None;
     }