feat(schema): Wave 2 — add generator categories, Organization schema, 404 pages

- Add category field to generatorSchema (required, 5 values)
- Assign categories to all 28 generators
- Add Organization JSON-LD schema to BaseLayout
- Create custom 404 pages (EN + RU)
- Add not-found and blog translation keys

.sisyphus/evidence/task-10-404.txt

@@ -0,0 +1,28 @@
+Task 10: Custom 404 Pages (EN + RU)
+Date: 2026-05-14
+Status: COMPLETE
+
+Files created:
+- src/pages/404.astro
+- src/pages/ru/404.astro
+
+Files modified:
+- src/i18n/translations.ts (added notFoundTitle, notFoundMessage, backToHome, blog keys)
+
+Build verification:
+- npm run build: PASS
+- Total pages: 64 (62 existing + 2x 404)
+- dist/404.html exists (Astro outputs root 404 as 404.html for static host compatibility)
+- dist/ru/404/index.html exists
+
+Content verified:
+- EN page contains "Page Not Found"
+- RU page contains "Страница не найдена"
+- Both pages include breadcrumb back to home, friendly message, and links to home + blog
+
+Key patterns used:
+- BaseLayout with title/description props
+- Locale detection via Astro.currentLocale
+- Translation keys via useT(lang)
+- Identical EN/RU template files (locale-aware links computed from lang variable)
+- JSON-LD WebPage schema injected via slot="head"

.sisyphus/evidence/task-8-build.txt

@@ -0,0 +1,12 @@
+Build output for Task 8 (Add category field to all generators + make required in schema)
+
+Command: npm run build
+Result: PASS
+
+Key metrics:
+- 64 pages built
+- 0 Zod validation errors
+- 0 build errors
+- All 28 generator JSON files validated successfully with required category field
+
+Timestamp: 2026-05-14

.sisyphus/evidence/task-9-org.txt

@@ -0,0 +1,16 @@
+Organization Schema Verification
+================================
+
+Build: PASS
+File modified: src/layouts/BaseLayout.astro
+
+Organization schema found in dist/index.html:
+{"@context":"https://schema.org","@type":"Organization","name":"Randify","url":"https://randify.pro","logo":"https://randify.pro/favicon.png"}
+
+Presence verified across built pages:
+- dist/index.html
+- dist/ru/index.html
+- dist/ru/privacy/index.html
+- dist/ru/generators/yesno/index.html
+- dist/ru/generators/wheel/index.html
+(and all other 63 built pages)