Move cospend routes to parameterized [cospendRoot=cospendRoot] supporting
both /cospend (DE) and /expenses (EN). Add cospendI18n.ts with 100+
translation keys covering all pages, components, categories, frequency
descriptions, and error messages. Translate BarChart legend, ImageUpload,
UsersList, SplitMethodSelector, DebtBreakdown, EnhancedBalance, and
PaymentModal. Update LanguageSelector and hooks.server.ts for /expenses.
Add type annotations, JSDoc types, null checks, and proper generics
to eliminate all svelte-check errors. Key changes include:
- Type $state(null) variables to avoid 'never' inference
- Add JSDoc typedefs for plain <script> components
- Fix mongoose model typing with Model<any> to avoid union complexity
- Add App.Error/App.PageState interfaces in app.d.ts
- Fix tuple types to array types in types.ts
- Type catch block errors and API handler params
- Add null safety for DOM queries and optional chaining
- Add standard line-clamp property alongside -webkit- prefix
Move components from flat src/lib/components/ into recipes/, faith/, and
cospend/ subdirectories. Replace ~144 relative imports across API routes
and lib files with $models, $utils, $types, and $lib aliases. Add $types
alias to svelte.config.js. Remove unused EditRecipe.svelte.
