Lift takes a style: shadow, surface, rim, glow or auto

The user wants Lift to read on dark themes, where a shadow has nothing to
darken. `Lift shadow|surface|rim|glow|auto` (`on` is auto, bare flips
auto and off): surface lightens the lifted part's ground about 5.5%
(Material-dark), rim is a thin soft light off its top and left edges,
glow a faint halo in the theme's accent (Chrome.accent, the focused box
colour), auto a shadow on a light page and surface with half a rim on a
dark one (by the page's luminance). Rim and glow are the soft kernel in a
light colour (no pre-warp: coloured light is laid on as is, within §8.2's
budget); each style is capped per theme so text keeps min(its contrast,
4.5) (tests: darkening and lightening over the native themes). The style
travels in the palette (Chrome.lift_style, one byte on the wire). Config
reports and ctl reads `Lift <style>`.

Shared files touched: config.zig, builtins.zig, ninep/ctl.zig,
detached/wire.zig (palette byte), gui.zig. Not touched: pardes.zig,
Messages.zig, mouse.zig.

1 files changed, 4 insertions, 0 deletions

diff --git a/src/detached/wire.zig b/src/detached/wire.zig
index 6e3b2d01..0a066410 100644
--- a/src/detached/wire.zig
+++ b/src/detached/wire.zig
@@ -267,6 +267,8 @@ pub const Frame = struct {
                     rgb.* = .{ 0, 0, 0 };
                     for (&rgb.*.?) |*channel| channel.* = try r.getByte();
                 }
+            } else if (field.type == u8) {
+                rgb.* = try r.getByte();
             } else for (rgb) |*channel| channel.* = try r.getByte();
         }
         try r.end();
@@ -816,6 +818,8 @@ pub fn encodeFrameLayers(out: []u8, cols: u16, rows: u16, cursor: ?Cursor, point
             if (field.type == ?[3]u8) {
                 try w.putBool(rgb != null);
                 if (rgb) |value| for (value) |channel| try w.putByte(channel);
+            } else if (field.type == u8) {
+                try w.putByte(rgb);
             } else for (rgb) |channel| try w.putByte(channel);
         }
     }