Add delivery cleanup design document

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

docs/plans/2026-02-22-delivery-cleanup-design.md

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+# FoamKing Delivery Cleanup Design
+
+Date: 2026-02-22
+
+## Goal
+
+Prepare the FoamKing calculator for zip delivery to customer. Clean up routes, security, auth, DB, and strip debug/dev artifacts. Customer will integrate into their own infrastructure.
+
+## 1. Route Restructure
+
+| Before | After | Access |
+|--------|-------|--------|
+| `/` | `/` | Public — calculator |
+| `/tilbud/[slug]` | `/tilbud/[slug]` | Public — quote view |
+| `/admin` | `/intern/beregner` | Protected — detailed calculator breakdown |
+| `/dashboard` | `/intern` | Protected — quote management (kanban) |
+| `/historik` | `/intern/historik` | Protected — quote archive |
+| `/login` | `/intern/login` | Public — login page |
+
+Middleware protects `/intern/*` except `/intern/login`.
+
+## 2. Authentication
+
+**Replace DB-based auth with env-based single admin user.**
+
+`lib/auth.ts` exports:
+- `checkAuth(request)` — single function, clear comments for JWT/OAuth swap
+- `login(email, password)` — compares against `ADMIN_EMAIL`/`ADMIN_PASSWORD` env vars
+- `logout(token)` — clears session
+
+Implementation: in-memory session Map or signed cookie. No DB tables for users/sessions.
+
+Remove:
+- `users` table
+- `sessions` table
+- `/api/auth/setup` endpoint
+- `bcrypt` dependency
+
+`.env` config:
+```
+ADMIN_EMAIL=admin@example.com
+ADMIN_PASSWORD=changeme
+```
+
+## 3. Database Cleanup
+
+**Keep SQLite (`better-sqlite3`), clean schema, add seed script.**
+
+Single table:
+```sql
+CREATE TABLE quotes (
+  id INTEGER PRIMARY KEY AUTOINCREMENT,
+  postal_code TEXT NOT NULL,
+  address TEXT,
+  area REAL NOT NULL,
+  height REAL NOT NULL,
+  include_floor_heating INTEGER DEFAULT 1,
+  flooring_type TEXT DEFAULT 'STANDARD',
+  customer_name TEXT NOT NULL,
+  customer_email TEXT NOT NULL,
+  customer_phone TEXT NOT NULL,
+  remarks TEXT,
+  total_excl_vat REAL NOT NULL,
+  total_incl_vat REAL NOT NULL,
+  status TEXT DEFAULT 'new',
+  created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+  email_opened_at TEXT
+);
+```
+
+- Quote IDs start at 1000
+- No migration hacks (clean CREATE TABLE only)
+- `lib/db.ts` opens DB and exports connection — no schema creation on import
+
+**Seed script** (`npm run setup`):
+- Creates `data/` directory
+- Creates quotes table
+- Sets auto-increment start to 1000
+- Prints success message
+
+## 4. Security Hardening
+
+- Remove all hardcoded credentials from codebase
+- Remove `docs/mail.txt` from delivery
+- Rate limiting on `/api/quote-request` and `/api/auth/login` (simple in-memory counter)
+- Validate/sanitize all inputs server-side
+- Cookies: `httpOnly`, `secure`, `sameSite: strict`
+- Remove `/api/auth/setup` endpoint
+
+## 5. Debug Stripping
+
+- Remove all `console.log` statements
+- Remove "Admin Mode" toggle from public pages
+- Remove dev-only comments and TODO markers
+
+## 6. Distance Calculation
+
+Unchanged — dual approach:
+- **Default:** Hardcoded postal code lookup table (no API key needed)
+- **Optional:** OpenRouteService API for precise driving distances (free tier, 2000 req/day)
+
+## 7. Build & Zip Delivery
+
+**`scripts/build-release.sh`:**
+
+1. Create temp directory `/tmp/foamking-release-<timestamp>/`
+2. Copy shipping files:
+   - `app/`, `components/`, `lib/`, `public/`, `scripts/setup.js`
+   - `middleware.ts`
+   - `package.json`, `tsconfig.json`, `tailwind.config.ts`
+   - `postcss.config.mjs`, `eslint.config.mjs`, `next.config.ts`
+   - `.env.example`, `OPSÆTNING.md`, `SETUP.md`
+3. Run `npm install` + `npm run build` to verify compilation
+4. Remove `node_modules/` and `.next/` from temp dir
+5. Zip as `foamking-beregner-<date>.zip`
+
+**Excluded from zip:**
+- `.git/`, `docs/`, `node_modules/`, `.next/`, `data/`
+- `.env.local`, `CLAUDE.md`, `README.md`, `package-lock.json`
+
+## 8. Setup Documentation
+
+**`OPSÆTNING.md`** (Danish) + **`SETUP.md`** (English) covering:
+
+1. Prerequisites (Node.js, npm)
+2. Install dependencies (`npm install`)
+3. Configure `.env.local`:
+   - `ADMIN_EMAIL` / `ADMIN_PASSWORD` (required)
+   - SMTP: Office 365 — `smtp.office365.com:587` with STARTTLS, enable SMTP AUTH for `tilbud@foamking.dk` in Exchange Admin Center (required)
+   - `OPENROUTE_API_KEY` (optional — for precise distance calculation)
+4. Run `npm run setup` (creates database)
+5. Build and start (`npm run build && npm start`)
+6. Route overview: `/` = public calculator, `/intern` = admin dashboard
+7. Auth customization: how to replace `checkAuth()` in `lib/auth.ts` for JWT/OAuth