feat(ui): implement 'Technical Editorial' design system

Author: sck000

.gemini/scratchpad.md

@@ -9,16 +9,16 @@ Nicco wants a web application (Vite + React) to track his various subscriptions
 - [x] Requirements gathering
 - [/] Project setup
 - [ ] Core feature implementation
-- [ ] UI/UX polishing
+- [/] UI/UX polishing (Focus: frontend-design skill)
 
 ## Current Status
 
-Setting up the Vite + React environment and preparing the TDD infrastructure.
+Initiating the "Design Thinking Phase" of the `frontend-design` skill. I need to define the aesthetic direction before writing code.
 
 ## Lessons
 
 (None yet)
 
 ## Executor's Feedback
 
-(None yet)
+Ready to apply the `frontend-design` skill. Needs user input on aesthetic preferences.