Follow the tag gap in the Look hover preview test

The tag's first character moved to TAG_TEXT_INSET when the grip's hit area was
separated from the text by a gap; the assertion kept reading GUTTER, which is
now the gap itself and carries the plain tag background. The test's own point —
that a preview on the tag's first character is paintable at tag column zero,
PREFIX_W being a body concern — is unchanged; only where column zero is moved.

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

1 files changed, 5 insertions, 3 deletions

diff --git a/src/pardes.zig b/src/pardes.zig
index c1a6b038..94f67ced 100644
--- a/src/pardes.zig
+++ b/src/pardes.zig
@@ -4280,10 +4280,12 @@ test "Look hover waits without mutating the pane and input cancels it" {
     try std.testing.expect(!p.animationActive());
 
     // File PREFIX_W belongs only to body line numbers. A preview on the tag's
-    // first character must be paintable all the way at tag column zero.
+    // first character must be paintable all the way at tag column zero — which
+    // is TAG_TEXT_INSET, not GUTTER: the grip keeps the gutter and the gap
+    // beside it separates the grip's hit area from the text.
     const tag_y = if (p.settings.tag_bottom) rect.y + rect.h - BOX_H else rect.y;
     p.look_hover_preview = .{
-        .col = rect.x + config.GUTTER,
+        .col = rect.x + TAG_TEXT_INSET,
         .row = tag_y,
         .pane = p.active,
         .serial = pane.serial,
@@ -4291,7 +4293,7 @@ test "Look hover waits without mutating the pane and input cancels it" {
     };
     _ = frame.reset(.retain_capacity);
     const tag_surface = try p.render(frame.allocator());
-    try std.testing.expectEqual(Color{ .rgb = expected_bg }, tag_surface.at(rect.x + config.GUTTER, tag_y).style.bg);
+    try std.testing.expectEqual(Color{ .rgb = expected_bg }, tag_surface.at(rect.x + TAG_TEXT_INSET, tag_y).style.bg);
 
     p.look_hover_preview = null;
     p.update(motion);