chore: release v1.4.0

skills/baoyu-cover-image/references/styles/chalkboard.md

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+# chalkboard
+
+Black chalkboard background with colorful chalk drawing style
+
+## Color Palette
+
+- Primary: Chalk White (#F5F5F5), Chalk Yellow (#FFE566), Chalk Pink (#FF9999)
+- Background: Chalkboard Black (#1A1A1A), Dark Green-Black (#1C2B1C)
+- Accents: Chalk Blue (#66B3FF), Chalk Green (#90EE90), Chalk Orange (#FFB366)
+
+## Visual Elements
+
+- Chalkboard texture with subtle dust and smudges
+- Hand-drawn chalk illustrations with sketchy lines
+- Chalk dust effects around text and drawings
+- Imperfect lines with visible texture
+- Doodles, arrows, underlines, stars
+- Eraser marks and chalk residue
+
+## Typography
+
+- Hand-drawn chalk lettering, slightly uneven, with chalk texture
+
+## Best For
+
+Educational content, tutorials, classroom themes, back-to-school, teaching materials