A Theme hint drops whole names to fit, never cutting one mid-word

The names were written into a fixed room until it ran out, the last one cut, and the click's form ran past the 128 bytes a 9P error carries. Each name now goes in whole or not at all, and both forms are sized to fit.

Co-Authored-By: Claude Opus 5.5 <[email protected]>

1 files changed, 6 insertions, 2 deletions

diff --git a/src/exec.zig b/src/exec.zig
index cf4e01ab..88c0705d 100644
--- a/src/exec.zig
+++ b/src/exec.zig
@@ -918,9 +918,13 @@ pub fn applySettingBuiltin(p: *Pardes, setting: config.Runtime.Setting, arg: ?[]
             // A config line is not answered on screen (applyStartupConfig
             // runs with announce off); a click or a ctl write is.
             if (!p.announce) return;
-            var near: [170]u8 = undefined;
+            // All of it within the 128 bytes a 9P error carries, so a write
+            // failing with it is cut nowhere: the names get what is left.
+            const shown = want[0..@min(want.len, 40)];
+            const room = 128 -| ("Theme: no theme \"\"; like it: ; Themes lists all".len + shown.len);
+            var near: [128]u8 = undefined;
             var text: [256]u8 = undefined;
-            return p.reportFailure(p.active, std.fmt.bufPrint(&text, "Theme: no theme \"{s}\"; like it: {s}; Themes lists all", .{ want[0..@min(want.len, 40)], colors.themesNear(&near, want) }) catch "Theme: no such theme");
+            return p.reportFailure(p.active, std.fmt.bufPrint(&text, "Theme: no theme \"{s}\"; like it: {s}; Themes lists all", .{ shown, colors.themesNear(near[0..@min(room, near.len)], want) }) catch "Theme: no such theme");
         },
         .font => {
             if (comptime !font_picker) return;