feat: category/collection detail screens + Inter font loading

New screens:
- Category detail (workout/category/[id]): filtered workout list
  with SwiftUI segmented Picker for level sub-filter
- Collection detail (collection/[id]): hero header with gradient,
  stats (workouts/minutes/calories), numbered workout list

Root layout:
- Inter font loading (400-900 weights) via @expo-google-fonts
- SplashScreen integration for font loading gate
- Route config for all screens with appropriate animations

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

app/CLAUDE.md

@@ -0,0 +1,26 @@
+<claude-mem-context>
+# Recent Activity
+
+<!-- This section is auto-generated by claude-mem. Edit content outside the tags. -->
+
+### Feb 19, 2026
+
+| ID | Time | T | Title | Read |
+|----|------|---|-------|------|
+| #5001 | 9:35 AM | 🔵 | Host Wrapper Located at Root Layout Level | ~153 |
+| #4964 | 9:23 AM | 🔴 | Added Host Wrapper to Root Layout | ~228 |
+| #4963 | 9:22 AM | ✅ | Root layout wraps Stack in View with pure black background | ~279 |
+| #4910 | 8:16 AM | 🟣 | Added Workout Detail and Complete Screen Routes | ~348 |
+
+### Feb 20, 2026
+
+| ID | Time | T | Title | Read |
+|----|------|---|-------|------|
+| #5224 | 1:24 PM | ✅ | Stage v1.1 files prepared for git commit - SwiftUI Button refactoring complete | ~434 |
+| #5206 | 1:03 PM | ⚖️ | SwiftUI component usage mandated for TabataFit app | ~349 |
+| #5115 | 8:57 AM | 🔵 | Root Layout Stack Configuration with Screen Animations | ~256 |
+| #5061 | 8:47 AM | 🔵 | Expo Router Tab Navigation Structure Found | ~196 |
+| #5053 | 8:23 AM | ✅ | Completed removal of all Host wrappers from application | ~255 |
+| #5052 | " | ✅ | Removed Host wrapper from root layout entirely | ~224 |
+| #5019 | 8:13 AM | 🔵 | Root layout properly wraps Stack with Host component | ~198 |
+</claude-mem-context>