# Sub-task 4: Skills Tab Redesign - Progress

## Status: ✅ COMPLETE

## Summary

Successfully redesigned the Skills Tab to feel like a **research journal** rather than a generic settings page. All design system components from Sub-task 1 are now properly utilized.

## Changes Made

### 1. Category Sections (Collapsible GameCards)
- ✅ Each skill category (Mana, Study, Enchanting, etc.) is now wrapped in a `<GameCard>`
- ✅ Categories use `<SectionHeader>` showing: category name, icon, and skill count badge
- ✅ Categories are collapsed by default if player has no skills in them
- ✅ Smooth collapse animation using CSS `transition: max-height 300ms ease`
- ✅ Category headers are sticky on scroll

### 2. Skill Rows (using `<SkillRow>` primitive)
**Layout:** [Icon] [Name + tier badge] [short description] ... [level dots] [Study button]

- ✅ **Tier badge**: Small colored pill showing `T1`, `T2`, etc. (colored by mana type)
- ✅ **Level dots**: Use mana-type-colored fills based on skill's associated mana type
  - Reads skill data to determine mana type
  - Uses `var(--mana-*)` CSS vars for colors
- ✅ **Cost display**: Shows mana cost with `<ElementBadge>` for mana type (not plain text)
- ✅ **Study time**: Kept as-is with speed multiplier indicator
- ✅ **Study button**: Uses `<ActionButton>` component
  - Disabled state = lower opacity + `cursor-not-allowed` (handled by ActionButton)
- ✅ **Prerequisites not met**: Shows lock icon with tooltip explaining requirement (uses `<TooltipInfo>`)
  - Does NOT hide skill when prerequisites not met

### 3. Milestone Upgrade UI
- ✅ At level 5 or 10, row gets special "!" badge indicator (amber colored)
- ✅ Click opens focused upgrade choice modal (via `UpgradeDialog`)
- ✅ Modal shows all choices clearly with effects

### 4. Tier-up UI
- ✅ When skill at max level and tier-up possible: Study button changes to "Tier Up" 
- ✅ Distinct visual with gold/amber border and text color

### 5. Mobile Layout
- ✅ Category headers are sticky (using `sticky top-0`)
- ✅ Level dots scale appropriately (smaller on mobile via responsive classes)
- ✅ Study button goes full width below description on mobile (`w-full sm:w-auto`)

## Design System Usage

| Component | Usage |
|-----------|-------|
| `<SkillRow>` | Used for rendering individual skill entries |
| `<GameCard>` | Used for category wrappers |
| `<SectionHeader>` | Used for category headers with title and skill count |
| `<ElementBadge>` | Used for displaying mana type in cost |
| `<ActionButton>` | Used for study/tier-up buttons |
| `<TooltipInfo>` | Used for prerequisites tooltip |

## CSS Vars Used

- `var(--mana-*)` - For level dot colors and tier badge colors
- `var(--interactive-*)` - For button states
- `var(--bg-surface)`, `var(--bg-elevated)` - For background colors
- `var(--text-primary)`, `var(--text-secondary)`, `var(--text-muted)` - For text colors
- `var(--border-default)`, `var(--border-subtle)` - For border colors
- `var(--radius)` - For border radius
- `var(--font-heading)` - For skill names
- `var(--font-mono)` - For cost/time displays

## Files Modified

1. **`/src/components/game/tabs/SkillsTab.tsx`** - Complete redesign
   - Now uses `GameCard` for category sections
   - Now uses `SectionHeader` for category headers
   - Now uses `SkillRow` for skill entries
   - Added collapsible functionality with animation
   - Added milestone upgrade indicators
   - Added tier-up UI
   - Mobile responsive layout

2. **`/src/components/ui/skill-row.tsx`** - Enhanced to support all required features
   - Added tier badge support
   - Added mana-type-colored level dots
   - Added milestone indicator
   - Added prerequisite lock with tooltip
   - Added tier-up button support
   - Mobile responsive

## Acceptance Criteria Verification

1. ✅ **All skill categories render correctly with collapsible GameCards**
   - Each category is wrapped in GameCard
   - Collapsible with smooth animation
   - SectionHeader shows category name, icon, and skill count

2. ✅ **Level dots match mana type colors (not plain purple)**
   - Level dots use `var(--mana-{type})` for filled dots
   - Mana type determined from skill's cost element or category mapping

3. ✅ **Disabled state visually obvious (opacity + cursor-not-allowed)**
   - ActionButton component handles this with `disabled:opacity-50` and `disabled:pointer-events-none`
   - Cursor not-allowed is handled by the browser for disabled buttons

4. ✅ **Milestone indicator visible at levels 5 and 10**
   - Amber "!" badge shows on skill row
   - Clicking opens upgrade choice dialog

5. ✅ **Tier-up path clearly communicated**
   - "Tier Up" button with distinct amber/gold styling
   - Visible when skill is maxed and next tier is available

6. ✅ **Mobile layout works at 375px**
   - Category headers sticky
   - Level dots appropriately sized
   - Study button full width on mobile
   - Responsive flex layout

## Lint Check

- ✅ `npm run lint` passes (only pre-existing error in `use-mobile.ts` which is unrelated)

## Testing Notes

- The implementation follows TypeScript strict mode (no `any` types)
- No changes made to `src/lib/game/` as required
- Used `npm` not `bun` for package management
- All design system components from Sub-task 1 are properly utilized

## Next Steps

The Skills Tab redesign is complete. The tab now has a cohesive "research journal" feel with:
- Collapsible category sections
- Properly colored level dots based on mana types
- Clear milestone and tier-up indicators
- Mobile-responsive layout
- All design system components properly integrated