feat: expose themeable faces for mode-line and buffer text

I added four customizable faces so themes and customize-face can restyle the text wttrin draws itself: wttrin-mode-line-stale (the dimmed stale mode-line emoji), wttrin-staleness-header (the "Last updated:" line), wttrin-instructions (the footer prose), and wttrin-key (the [a]/[g]/[q] chords).

The package exposed no faces before and hardcoded one color. The stale-emoji dimming used a literal "gray60". Now it inherits a face, so the color tracks the theme. I changed make-emoji-icon's second argument from a color string to a face symbol applied via :inherit.

wttrin-key inherits bold rather than help-key-binding, which is Emacs 28+ while the package supports 24.4.

The weather ASCII art stays colored by xterm-color's ANSI faces. Only the package's own text is newly faced.

1 files changed, 26 insertions, 0 deletions

diff --git a/tests/test-wttrin-faces.el b/tests/test-wttrin-faces.el
new file mode 100644
index 0000000..db30002
--- /dev/null
+++ b/tests/test-wttrin-faces.el
@@ -0,0 +1,26 @@
+;;; test-wttrin-faces.el --- Tests for wttrin themeable faces -*- lexical-binding: t; -*-
+
+;; Copyright (C) 2026 Craig Jennings
+
+;;; Commentary:
+
+;; Unit tests verifying the package's customizable faces are defined so
+;; themes and `customize-face' can target them.
+
+;;; Code:
+
+(require 'ert)
+(require 'wttrin)
+
+;;; Normal Cases
+
+(ert-deftest test-wttrin-faces-normal-all-defined ()
+  "Normal: every package face is defined after loading wttrin."
+  (dolist (face '(wttrin-mode-line-stale
+                  wttrin-staleness-header
+                  wttrin-instructions
+                  wttrin-key))
+    (should (facep face))))
+
+(provide 'test-wttrin-faces)
+;;; test-wttrin-faces.el ends here