docs: initialize umzugsliste

WordPress plugin for Siegel Umzüge moving list form.

Creates PROJECT.md with requirements and constraints.

.planning/PROJECT.md

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+# Umzugsliste
+
+## What This Is
+
+A WordPress plugin providing a digital moving list form for Siegel Umzüge. Customers calculate the volume of their move by entering inventory items room-by-room, then request quotes for moving services. This plugin migrates the legacy standalone `liste.php` script into a secure, integrated WordPress solution.
+
+## Core Value
+
+Email format identical to legacy — office staff workflow depends on the exact HTML table structure.
+
+## Requirements
+
+### Validated
+
+(None yet — ship to validate)
+
+### Active
+
+- [ ] Plugin infrastructure with CPT `umzugsliste_entry` for storing all submissions
+- [ ] Settings page with receiver email, captcha config (reCAPTCHA v2/v3/hCaptcha), thank you URL
+- [ ] Shortcode `[umzugsliste]` renders form matching legacy structure
+- [ ] Volume calculations (cbm) matching legacy logic exactly
+- [ ] Captcha integration with all three providers
+- [ ] Legacy HTML table email format generation
+- [ ] i18n support (German primary, English secondary)
+- [ ] Form submission saves to CPT before email (data safety)
+- [ ] Inline form validation (not JS alerts)
+
+### Out of Scope
+
+- PDF generation — email HTML is the only output format
+- Customer accounts — simple form submission, no login
+- Furniture list admin editing — future feature (extract as-is for v1)
+- Frontend redesign — keep existing form look, wrap it properly
+
+## Context
+
+**Legacy Code Location:** `/Users/vmiller/Local Sites/siegel-liste/app/public/liste/`
+- `liste.php` — Main form with email sending (PHPMailer/SMTP)
+- `liste_ENG.php` — English version
+- `functions.inc.php` — Email HTML generators, date selectors
+- `css/` — Foundation CSS + custom.css
+- `js/` — Foundation JS
+
+**Legacy Structure:**
+- 7 room sections: Wohnzimmer, Schlafzimmer, Arbeitszimmer, Bad, Küche/Esszimmer, Kinderzimmer, Keller
+- Each furniture item: quantity (v prefix), cbm value (q prefix), montage option (m prefix)
+- Additional work sections: Montage, Schrank, Elektriker, Dübelarbeiten, Packarbeiten, Anfahrt
+- Sonstiges free text section
+
+**Environment:**
+- Local by WP Engine for development
+- WordPress site uses Salient theme
+- Plugin directory: `wp-content/plugins/umzugsliste/`
+
+## Constraints
+
+- **Theme**: Must integrate with Salient theme
+- **Language**: German primary, English secondary
+- **Email Format**: Must match legacy HTML table structure exactly
+- **Email Delivery**: Use wp_mail() with SMTP plugin support
+- **Encoding**: UTF-8 (convert from legacy ISO-8859-1)
+- **Access**: Editors and above can view CPT entries
+- **Admin UI**: Top-level menu (Umzugsliste with Entries + Settings)
+
+## Key Decisions
+
+| Decision | Rationale | Outcome |
+|----------|-----------|---------|
+| Extract furniture data as static config | Matches legacy, editing is future feature | — Pending |
+| Support all 3 captcha providers | Flexibility for admin preference | — Pending |
+| Use wp_mail() not PHPMailer directly | WordPress integration, SMTP plugins work | — Pending |
+| Inline validation not JS alerts | Modern UX improvement over legacy | — Pending |
+| Redirect to configurable thank you URL | Better UX than inline confirmation | — Pending |
+
+---
+*Last updated: 2026-01-16 after initialization*

.planning/config.json

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+{
+  "mode": "yolo",
+  "depth": "standard",
+  "parallelization": {
+    "enabled": true,
+    "plan_level": true,
+    "task_level": false,
+    "skip_checkpoints": true,
+    "max_concurrent_agents": 3,
+    "min_plans_for_parallel": 2
+  },
+  "gates": {
+    "confirm_project": false,
+    "confirm_phases": false,
+    "confirm_roadmap": false,
+    "confirm_breakdown": false,
+    "confirm_plan": false,
+    "execute_next_plan": false,
+    "issues_review": false,
+    "confirm_transition": false
+  },
+  "safety": {
+    "always_confirm_destructive": true,
+    "always_confirm_external_services": true
+  }
+}