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, 11 insertions, 1 deletions

diff --git a/src/macos/pardes.h b/src/macos/pardes.h
index df3ba04f..f74330e5 100644
--- a/src/macos/pardes.h
+++ b/src/macos/pardes.h
@@ -76,6 +76,11 @@ typedef struct {
 
 #define PARDES_CELL_DEFAULT 0x01u
 #define PARDES_CELL_TAGLINE 0x02u
+// The look-hover affordance: the word under the pointer is a real Look or
+// Exec operand. Hosts that draw the affordance as more than the quiet tint
+// (macOS composes a liquid-glass overlay) read this instead of guessing
+// from the background colour, which a real selection shares.
+#define PARDES_CELL_HOVER 0x04u
 
 // One coherent snapshot for the full-window shader pass. The bitmask lets the
 // host run CRT, ripple and glitch in one kernel instead of stacking filters;
@@ -323,6 +328,10 @@ uint32_t pardes_topbar_pane_border_rgb(void);
 // pardes.TOPBAR_H, and src/macos.zig asserts the two agree.
 #define PARDES_TOPBAR_H 1u
 
+// The active pane's tag row background, for hosts that afford the active
+// tagline more than a tint — macOS raises it like an old-school bevel.
+uint32_t pardes_tag_active_bg(void);
+
 // Persistent full-window effect switches and their display-clock time. A zero
 // flags word means draw the CoreText frame directly; any nonzero combination
 // is one postprocess pass. Snapshot by value, with no borrowed storage.
@@ -510,7 +519,8 @@ bool pardes_active_dirty(void);
 int32_t pardes_cursor_x(void);
 int32_t pardes_cursor_y(void);
 bool pardes_cursor_bar(void);
-// Mouse pointer affordance: 0 = default text pointer, 1 = link hand.
+// Mouse pointer affordance: 0 = default text pointer, 1 = link hand,
+// 2 = a validated Look/Exec target under the pointer (the acme arrow).
 uint32_t pardes_pointer_shape(void);
 
 // The Look or Exec the core performed since this was last asked, and clears