Unify activity templates and add frequency words practice

fix: accept equivalent duplicate parts in order answers

fix: handle duplicate parts in order activities

chore: retire public activity editor

content: add colours-build-the-word

content: add colours-build-the-word

content: add colours-spelling-practice

content: add colours-spelling-practice

fix: normalize generated activity model newline

feat: export activity model and source metadata for editor

Update: presentContinuousActivity.test.ts

content: update present-continuous-practice

content: update family-members

feat: export activity catalog for editor

fix: use hash navigation in activity admin

fix: set GitVerse Pages production base path

feat: add local activity editor workflow

Refine wildlife letter cards and replace dodo illustration

Add AS6 wildlife vocabulary letter-order activity

Fix browser fetch context for assignment results