docs: add project documentation and initial specs

docs/FEATURES.md

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+# Features
+
+## Current Implementation
+
+### Public site
+
+- Localized homepage with service positioning and marquee content
+- About page with profile-oriented content
+- Portfolio list with category filtering
+- Portfolio detail pages with multiple view modes:
+  - `GRID`
+  - `STORY`
+  - `CASE_STUDY`
+- Contact form with:
+  - validation
+  - optional Turnstile
+  - rate limiting
+  - email delivery
+- Success page after contact submission
+- Maintenance redirect flow
+
+### Admin
+
+- Password-based app login plus optional Basic Auth gateway
+- Dashboard summary cards
+- Portfolio category management
+- Portfolio project creation and editing
+- Section and asset management inside each project
+- Media library with usage bindings
+- Site settings management
+- SMTP settings and test email
+- Contact protection settings
+- Marquee settings
+- Maintenance toggle
+- UI Kit preview page
+
+## Present But Not Implemented As Full Features
+
+- `Products`
+  - only appears as a disabled navigation label
+- `Downloads`
+  - document assets can be opened from portfolio detail pages, but there is no standalone downloads domain
+
+## Not Currently Implemented
+
+- `Orders`
+- `Project Inquiry` as a separate workflow or model
+- Customer accounts
+- Checkout or payment handling
+
+## Recommended Improvements
+
+- Add explicit feature boundaries between
+
+`portfolio`
+
+content and future
+
+`products/orders/downloads`
+
+domains
+- Store inbound contact submissions if business follow-up requires history
+- Add tests for admin server actions and middleware routing