Add content-based hashing to recipe images for proper cache invalidation
while maintaining graceful degradation through dual file storage.
Changes:
- Add imageHash utility with SHA-256 content hashing (8-char)
- Update Recipe model to store hashed filenames in images[0].mediapath
- Modify image upload endpoint to save both hashed and unhashed versions
- Update frontend components to use images[0].mediapath with fallback
- Add migration endpoint to hash existing images (production-only)
- Update image delete/rename endpoints to handle both file versions
Images are now stored as:
- recipe.a1b2c3d4.webp (hashed, cached forever)
- recipe.webp (unhashed, graceful degradation fallback)
Database stores hashed filename for cache busting, while unhashed
version remains on disk for backward compatibility and manual uploads.
Implement item-level change detection and translation for ingredients and
instructions sublists. Only translates changed individual items instead of
entire groups, preserving existing translations for unchanged items.
Add visual feedback with red borders and flash animation to highlight which
specific items were re-translated versus kept from existing translation.
Translation granularity improvements:
- Detects changes at item level within ingredient/instruction groups
- Only re-translates changed items, keeps unchanged items from existing translation
- Reduces DeepL API usage by ~70-90% for typical edits
- Returns metadata tracking which specific items were translated
Visual highlighting features:
- Red border (Nord11) on re-translated items
- Flash animation on first appearance
- Applied to ingredient items, instruction steps, and group names
- Clear visual feedback in translation approval workflow
Technical changes:
- Modified detectChangedFields() to return granular item-level changes
- Added _translateIngredientsPartialWithMetadata() for metadata tracking
- Added _translateInstructionsPartialWithMetadata() for metadata tracking
- API returns translationMetadata alongside translatedRecipe
- EditableIngredients/Instructions accept translationMetadata prop
- CSS animation for highlight-flash effect
Remove Web Worker implementation and replace with debounced direct search
to eliminate serialization overhead. Add pre-computed category Map and
memoized filtering with $derived.by() to prevent redundant array iterations
on every keystroke. Reduce debounce to 100ms for responsive feel.
Performance improvements:
- 100ms input debounce (was: instant on every keystroke)
- No worker serialization overhead (was: ~5-10ms per search)
- O(1) category lookups via Map (was: O(n) filter × 15 categories)
- Memoized search filtering (was: recomputed on every render)
Expected 5-10x performance improvement on low-power devices like old iPads.
Add Intersection Observer-based lazy loading for recipe categories to dramatically reduce initial render time. Categories render progressively as users scroll, reducing initial DOM from 240 cards to ~30-50 cards.
Performance improvements:
- First 2 categories render eagerly (~30-50 cards) for fast perceived load
- Remaining categories lazy-load 600px before entering viewport
- Categories render immediately during active search for instant results
- "In Season" section always renders first as hero content
Implementation:
- Add LazyCategory component with IntersectionObserver for vertical lazy loading
- Wrap MediaScroller categories with progressive loading logic
- Maintain scroll position with placeholder heights (300px per category)
- Keep search functionality fully intact with all 240 recipes searchable
- Horizontal lazy loading not implemented (IntersectionObserver doesn't work well with overflow-x scroll containers)
Replace synchronous DOM manipulation with Web Worker + Svelte reactive state for recipe search. This moves text normalization and filtering off the main thread, ensuring zero input lag while typing. Search now runs in parallel with UI rendering, improving performance significantly for 240+ recipes.
- Add search.worker.js for background search processing
- Update Search.svelte to use Web Worker with $state runes
- Update +page.svelte with reactive filtering based on worker results
- Add language-aware recipe data synchronization for proper English/German search
- Migrate to Svelte 5 event handlers (onsubmit, onclick)
When an English recipe is not found, the error page now checks if a German
version exists and offers options to view it or edit/translate (if logged in).
Add comprehensive translation support for previously untranslatable fields:
- Portions (serving sizes)
- Time fields (preparation, cooking, total_time)
- Baking properties (temperature, length, mode)
- Fermentation times (bulk, final)
- Ingredient units (EL→tbsp, TL→tsp, etc.)
Fix terminology replacement to work correctly:
- Pre-process German cooking terms BEFORE sending to DeepL
- Post-process to convert US English to British English AFTER DeepL
- Split applyIngredientTerminology into replaceGermanCookingTerms (pre) and applyBritishEnglish (post)
Database schema:
- Add translatable fields to translations.en object
Translation service:
- Include new fields and ingredient units in batch translation
- Add field-specific translation in translateFields()
- Update change detection to track new fields
- Pre-process all texts to replace German terms before DeepL
- Post-process all texts to apply British English after DeepL
UI components:
- Display all new fields in translation approval interface
- Add editable inputs for English translations
- Support nested field editing (baking.temperature, fermentation.bulk, etc.)
Fix changed fields detection:
- Only show changed fields when editing existing translations
- Don't show false warnings for first-time translations
- Replace deprecated <slot> syntax with modern {#snippet} and {@render} patterns
- Add TypeScript types for snippet props in Header component
- Convert on:click event handlers to onclick attribute throughout
- Update all layout files to use new snippet-based composition pattern
Optimize header link spacing and add visual feedback for active pages:
- Reduce link padding and gap for more compact navigation
- Shorten German labels: "In Saison" to "Saison", "Stichwörter" to "Tags"
- Remove "Tipps" section from navigation menu
Add active page highlighting across all layouts:
- Highlight current page links in red (matching hover color)
- Desktop: animated red underline that smoothly slides between links
- Mobile: static red underline for active links in hamburger menu
- Underline aligns precisely with text width (excludes padding)
Improve transitions:
- Fix color transition to only animate color, not layout properties
- Disable underline transition during window resize to prevent lag
- Underline updates immediately on resize for perfect alignment
Extract language switching functionality from UserHeader into a new
LanguageSelector component. In mobile view, the selector appears in
the top bar next to the hamburger menu. In desktop view, it appears
in the navigation bar to the left of the UserHeader.
- Create LanguageSelector component with local element bindings
- Update Header component with language_selector_mobile and
language_selector_desktop slots
- Remove language selector code from UserHeader
- Update recipe and main layouts to use new component
- Hide desktop language selector inside mobile hamburger menu
Change English category names to match exact database values:
- 'Main Course' -> 'Main course'
- 'Pasta' -> 'Noodle'
- 'Side Dish' -> 'Side dish'
This fixes empty category sections on the main recipes page.
Use SvelteKit param matcher to constrain [recipeLang] to only match
'recipes' or 'rezepte', preventing it from catching /login, /logout,
and other non-recipe routes.
