Make the macOS shell a first-class host

Pty children are exec'd with their own TERM/COLORTERM/TERM_PROGRAM instead of
inheriting a .app launch's empty environment, and ttyTaken finally answers on
darwin — libproc walks the tty's foreground process group — so Escape reaches
the child and Exec stops believing every pane sits at its prompt. The
occupancy suite runs on both platforms now.

The workspace tag row moves into the native menu bar as a Builtins menu.
-Dworkspace-tag (default off for -Dplatform=macos, on everywhere else) drives
it, and Pardes.topBarHeight replaces the TOPBAR_H constant so the core stops
reserving the row.

The view pins every variable-font axis to the file's own default (Maple Mono
came up Thin otherwise), shapes ligatures, carries per-shape pointer cursors,
and draws the look-hover affordance as refracted glass. Tag rows fill edge to
edge, with the anchor box painted back on top of that fill and its mode glyph
centred on the same square. Theme accents re-saturated across the set.

Co-Authored-By: Claude Opus 5 (1M context) <[email protected]>

1 files changed, 4 insertions, 4 deletions

diff --git a/src/layout.zig b/src/layout.zig
index 47b2c1a4..c6cb7503 100644
--- a/src/layout.zig
+++ b/src/layout.zig
@@ -8,7 +8,7 @@ pub const Rect = struct { x: u16 = 0, y: u16 = 0, w: u16 = 0, h: u16 = 0 };
 pub const Snapshot = struct { serial: u32, box: Box };
 const MAX_COLS = pardes.MAX_COLS;
 const MAX_PANES = pardes.MAX_PANES;
-const TOPBAR_H = pardes.TOPBAR_H;
+
 const BOX_H = pardes.BOX_H;
 
 pub const Presentation = struct {
@@ -795,7 +795,7 @@ pub fn movePlacement(p: *Pardes, id: usize, cur_x: u16, cur_y: u16) ?MovePlaceme
         const sib = if (src.idx > 0) p.col_panes[src.col][src.idx - 1] else p.col_panes[src.col][src.idx + 1];
         heights[sib] +|= p.rects[id].h;
     }
-    var y: u16 = TOPBAR_H + p.columnBarHeight();
+    var y: u16 = p.topBarHeight() + p.columnBarHeight();
     var last: ?MovePlacement = null;
     for (0..p.col_n[tc]) |k| {
         const pid = p.col_panes[tc][k];
@@ -1123,7 +1123,7 @@ fn collapseNeighbor(p: *Pardes, col: usize, index: usize) ?usize {
 }
 
 fn computeCollapsedColumn(p: *Pardes, c: usize, x: u16, width: u16, folded: usize) void {
-    var y: u16 = TOPBAR_H + p.columnBarHeight();
+    var y: u16 = p.topBarHeight() + p.columnBarHeight();
     const available = p.screen_h -| y;
     var expanded_left: usize = 0;
     var weight: f32 = 0;
@@ -1196,7 +1196,7 @@ pub fn compute(p: *Pardes) void {
         }
         if (vsum <= 0) vsum = 1;
 
-        var y: u16 = TOPBAR_H + p.columnBarHeight();
+        var y: u16 = p.topBarHeight() + p.columnBarHeight();
         const avail_h = p.screen_h -| y;
         for (0..p.col_n[c]) |k| {
             const id = p.col_panes[c][k];