style(prompts): format prompt text as code blocks for monospace rendering

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

prompts/01-create-todo.md

@@ -2,11 +2,10 @@
 
 Copy and paste this into Claude Code:
 
----
-
+```
 Create a todo app as a single index.html file.
 
-**Functionality:**
+Functionality:
 - Add new tasks with a text input and an "Add" button (also works on Enter)
 - Mark tasks as complete (strikethrough + muted color, completed tasks move to bottom)
 - Delete tasks with a button that only appears on hover
@@ -16,7 +15,7 @@ Create a todo app as a single index.html file.
 - Smooth staggered fade-in animation when tasks render
 - No external dependencies except one Google Font
 
-**Design (this matters, make it look like a real app):**
+Design (this matters, make it look like a real app):
 - Dark mode with a true warm dark background, NOT cold navy or blue-tinted
 - Use Plus Jakarta Sans from Google Fonts
 - Warm color palette: copper/peach for the primary accent, sage green for completed checkmarks, warm off-white for text
@@ -26,8 +25,7 @@ Create a todo app as a single index.html file.
 - Subtle radial gradient on the page background for depth
 - Generous spacing, refined focus states with soft glow
 - The app should feel premium and intentional, not like a tutorial demo
-
----
+```
 
 ## What Happens