fix(ui/tree): no fingerer-ring bleed at the bottom of the modal

src/ui/mod.rs

@@ -384,8 +384,11 @@ pub fn draw(
         Mode::Tree => {
             // Full-screen modal — the tree renderer takes the WHOLE frame
             // area, not just the sidebar column, so the player gets the
-            // full canvas to pan around.
-            let out = tree::draw(frame, area, state, mouse_pos, tree_render);
+            // full canvas to pan around. Pass the live `help_height` so
+            // the modal covers exactly down to the help bar; hardcoding
+            // a `2` here used to leak a one-row strip of biscuit when
+            // the help text wrapped to a single row.
+            let out = tree::draw(frame, area, state, mouse_pos, tree_render, help_height);
             tree_node_rects = out.node_rects;
             tree_action_button = out.action_button;
         }

src/ui/tree.rs

@@ -55,10 +55,6 @@ const PAN_SNAP_EPSILON: f32 = 0.5;
 /// of edges.
 const VISIBLE_RADIUS_LOTS: i32 = 6;
 
-/// Help bar height reserved at the bottom — `ui::mod.rs` rendered the help
-/// text there before we got the frame, so we leave those rows alone.
-const HELP_BAR_HEIGHT: u16 = 2;
-
 const INFO_PANE_HEIGHT: u16 = 8;
 const HEADER_HEIGHT: u16 = 3;
 
@@ -68,8 +64,16 @@ pub fn draw(
     state: &GameState,
     mouse_pos: Option<(u16, u16)>,
     tree_render: &mut TreeRenderState,
+    help_bar_height: u16,
 ) -> TreeDrawOutput {
-    let modal_h = area.height.saturating_sub(HELP_BAR_HEIGHT);
+    // `help_bar_height` is the actual `wrapped_height(help_text, ...)`
+    // ui::mod.rs reserved for the bottom help row(s). When the help
+    // text fits in a single row it's 1, otherwise 2; passing the live
+    // value lets the modal hug exactly the row above the help bar,
+    // so the biscuit + hands rendered into `left[1]` underneath stay
+    // fully covered. A previous hardcoded `2` left a one-row strip
+    // exposed whenever `help_bar_height == 1`.
+    let modal_h = area.height.saturating_sub(help_bar_height);
     if modal_h < HEADER_HEIGHT + INFO_PANE_HEIGHT + 4 {
         // Terminal too small; bail out gracefully.
         return TreeDrawOutput {