Added Zustand caches for course modules, lesson posts, and game scores to avoid redundant Firestore reads, Fixed PERMISSION_DENIED errors on progress and courses collections by splitting allow read into get/list rules, Fixed PERMISSION_DENIED for unviewed posts by guarding null resource in progress allow get rule, Fixed circular import between Firebase.ts and authUtils.ts by extracting token-refresh helpers into sessionTokens.ts, Fixed module accordion collapsing after lessons loaded by adding a ref-based re-entry guard in DynamicCourseModules

Improved home and drawer navigation flow to reduce route stacking and preserve user context, Expanded profile editing with learner preference capture and stronger save/error handling, Enhanced game feedback with contextual game-over messaging and motivational replay guidance, Added start-game historical metrics (best score, last score, and latest 5 entries) with empty-state guidance

Firestore-backed course progress persistence with viewed/in-progress/completed states, progress indicators in catalog, module list, lesson rows, and post cards, progress snapshot and resume-target computation for course/module/lesson hierarchy, complete course and lesson detail flows with module expansion, lesson posts, and improved back navigation, Firestore integration for course modules, lessons, posts, likes, and admin write/update workflows.