Motion flavours, and Lift is shadow, rim or auto: auto on a dark page recedes the other panes (InactiveDim)

Motion off|crisp|smooth|bouncy|playful is one parameter set (animation.Motion)
every fx animation reads. One focus spring per pane drives both the lift and
the dim, at the flavour's pace; a grid snaps.

Lift drops glow and surface. A shadow falls on pane bodies and rails only,
capped so text and the selection keep min(contrast, 4.5); rim is a hairline
along the focused tag's top. auto is a shadow on a light page; on a dark page
the core recedes the unfocused panes' text (InactiveDim, ported from 2e4d97f,
default 30 under auto) with the same floor. Tests: focused text contrast is
never below unfocused in any style, dim or theme; the focused pane's cells and
tag are untouched by a dim.

Shared files: src/config.zig, src/builtins.zig, src/ninep/ctl.zig,
src/surface.zig, src/detached/wire.zig, docs/config.md,
test/snapshots/builtins.snap (one more wheel for the longer help).

1 files changed, 2 insertions, 0 deletions

diff --git a/src/ninep/ctl.zig b/src/ninep/ctl.zig
index 46c451ed..1c21d314 100644
--- a/src/ninep/ctl.zig
+++ b/src/ninep/ctl.zig
@@ -306,6 +306,8 @@ fn writeSettings(p: *Pardes, w: *std.Io.Writer) !void {
             .shader => for (s.post.list()) |entry| if (entry.scene == null) try w.print("{s} {s}\n", .{ word, entry.path.get() }),
             .shader_animation => try w.print("{s} {s}\n", .{ word, @tagName(s.shader_animation) }),
             .lift => try w.print("{s} {s}\n", .{ word, @tagName(s.lift) }),
+            .motion => try w.print("{s} {s}\n", .{ word, @tagName(s.motion) }),
+            .inactive_dim => try w.print("{s} {d}\n", .{ word, s.inactive_dim }),
         }
     }
     try w.writeAll("LocationsConfig ");