feat(baoyu-image-cards): add sketch-notes style, palette system, and 3 new presets

skills/baoyu-image-cards/references/palettes/macaron.md

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+# Macaron Palette
+
+Soft pastel color blocks on warm cream background. Gentle, approachable, educational feel.
+
+## Background
+
+- Color: Warm cream (#F5F0E8)
+- Texture: Subtle paper grain, warm tone
+
+## Colors
+
+| Role | Color | Hex | Usage |
+|------|-------|-----|-------|
+| Background | Warm Cream | #F5F0E8 | Primary background |
+| Text | Deep Charcoal | #2C3E50 | Titles, main content |
+| Secondary Text | Warm Gray | #6B6B6B | Annotations, labels |
+| Zone 1 | Macaron Blue | #A8D8EA | Information blocks |
+| Zone 2 | Macaron Lavender | #D5C6E0 | Information blocks |
+| Zone 3 | Macaron Mint | #B5E5CF | Information blocks |
+| Zone 4 | Macaron Peach | #F8D5C4 | Information blocks |
+| Accent | Coral Red | #E8655A | Emphasis, highlights |
+
+## Semantic Constraint
+
+Soft pastel macaron color palette. Use zone colors as rounded card backgrounds for distinct information blocks. Accent coral red sparingly for emphasis on key terms only. All colors should feel gentle and approachable — no saturated or neon tones.
+
+## Best Paired With
+
+- `sketch-notes` — natural pairing for hand-drawn educational content
+- `notion` — macaron accents soften the monochrome aesthetic
+- `chalkboard` — pastel chalk tones replace standard chalk colors
+- `warm` — reinforces the cozy, friendly feel
+- `fresh` — complements the clean, natural aesthetic

skills/baoyu-image-cards/references/palettes/neon.md

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+# Neon Palette
+
+Vibrant neon colors on dark background. High-energy, futuristic, eye-catching.
+
+## Background
+
+- Color: Dark Purple (#1A1025)
+- Texture: Smooth, deep
+
+## Colors
+
+| Role | Color | Hex | Usage |
+|------|-------|-----|-------|
+| Background | Dark Purple | #1A1025 | Primary background |
+| Text | Bright White | #F0F0F0 | Titles, main content |
+| Secondary Text | Light Lavender | #B8B8D4 | Annotations, labels |
+| Zone 1 | Neon Cyan | #00F5FF | Information blocks |
+| Zone 2 | Neon Magenta | #FF00FF | Information blocks |
+| Zone 3 | Neon Green | #39FF14 | Information blocks |
+| Zone 4 | Neon Pink | #FF6EC7 | Information blocks |
+| Accent | Electric Yellow | #FFFF00 | Emphasis, highlights |
+
+## Semantic Constraint
+
+Vibrant neon color palette on dark background. Colors should glow against the dark base. High contrast, futuristic feel. Use neon sparingly — too many glowing elements become chaotic. Let dark background breathe.
+
+## Best Paired With
+
+- `bold` — amplifies high-impact energy
+- `pop` — neon takes the vibrancy further
+- `minimal` — neon accents on dark create striking contrast
+- `notion` — futuristic knowledge card aesthetic

skills/baoyu-image-cards/references/palettes/warm.md

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+# Warm Palette
+
+Warm earth tones on soft peach background. Cozy, inviting, no cool colors.
+
+## Background
+
+- Color: Soft Peach (#FFECD2)
+- Texture: Warm, slightly textured
+
+## Colors
+
+| Role | Color | Hex | Usage |
+|------|-------|-----|-------|
+| Background | Soft Peach | #FFECD2 | Primary background |
+| Text | Deep Brown | #744210 | Titles, main content |
+| Secondary Text | Warm Brown | #9C6644 | Annotations, labels |
+| Zone 1 | Warm Orange | #ED8936 | Information blocks |
+| Zone 2 | Terracotta | #C05621 | Information blocks |
+| Zone 3 | Golden Yellow | #F6AD55 | Information blocks |
+| Zone 4 | Dusty Rose | #D4A09A | Information blocks |
+| Accent | Burnt Sienna | #A0522D | Emphasis, highlights |
+
+## Semantic Constraint
+
+Warm-only color palette, no cool colors (no blue, green, purple). Earth tones throughout. Evokes comfort, warmth, and trust. All colors should feel like autumn sunlight.
+
+## Best Paired With
+
+- `warm` — natural pairing, amplifies cozy feel
+- `cute` — warm pastels enhance the sweet aesthetic
+- `retro` — earth tones complement vintage style
+- `sketch-notes` — warm educational feel