docs(08-02): complete additional work & Sonstiges integration plan

Tasks completed: 2/2
- Render additional work sections and Sonstiges in form
- Sanitize additional work data and generate email sections

SUMMARY: .planning/phases/08-bugfixes-legacy-parity/08-02-SUMMARY.md

.planning/STATE.md

@@ -10,17 +10,17 @@ See: .planning/PROJECT.md (updated 2026-01-16)
 ## Current Position
 
 Phase: 8 of 9 (Bug Fixes & Legacy Parity)
-Plan: 1 of 2 complete
-Status: In progress
-Last activity: 2026-02-06 — Completed 08-01-PLAN.md (session bug fix)
+Plan: 2 of 2 complete
+Status: Phase complete
+Last activity: 2026-02-06 — Completed 08-02-PLAN.md (additional work & Sonstiges integration)
 
-Progress: ████████░░ 84% (8/9.5 plans)
+Progress: █████████░ 90% (9/10 plans)
 
 ## Performance Metrics
 
 **Velocity:**
-- Total plans completed: 8
-- Average duration: ~30 min per plan
+- Total plans completed: 9
+- Average duration: ~27 min per plan
 - Total execution time: ~4 hours
 
 **By Phase:**
@@ -34,7 +34,7 @@ Progress: ████████░░ 84% (8/9.5 plans)
 | 5 | 1 | Real-time calculations with German decimal support |
 | 6 | 1 | Form handler, email generator, wp_mail() integration |
 | 7 | 1 | Captcha verification and inline validation |
-| 8 | 1/2 | Bug fixes & legacy parity (gap closure) |
+| 8 | 2/2 | Bug fixes & legacy parity (gap closure) |
 | 9 | — | Internationalization (gap closure) |
 
 **Overall Trend:**
@@ -58,6 +58,9 @@ Recent decisions affecting current work:
 | 8-01 | Use uniqid('', true) with more_entropy | Extra entropy prevents collisions under high traffic |
 | 8-01 | Pass form_id via hidden field + GET param | WordPress-native, no sessions needed |
 | 8-01 | Delete transient after display | Prevents stale errors on refresh |
+| 8-02 | Field key from explicit 'key' or sanitize_title(name) | Anfahrt section needs explicit keys, others can be generated |
+| 8-02 | Additional work sections between rooms and grand totals | Matches legacy form placement for office staff familiarity |
+| 8-02 | Omit empty sections from email | Keeps email clean like room section pattern |
 
 ### Deferred Issues
 
@@ -71,7 +74,7 @@ None.
 
 ## Session Continuity
 
-Last session: 2026-02-06T13:55:34Z
-Stopped at: Completed 08-01-PLAN.md
+Last session: 2026-02-06T14:07:34Z
+Stopped at: Completed 08-02-PLAN.md (Phase 8 complete)
 Resume file: None
-Next up: Plan 08-02 (Additional work sections and Sonstiges integration)
+Next up: Phase 9 (Internationalization)

.planning/phases/08-bugfixes-legacy-parity/08-02-SUMMARY.md

@@ -0,0 +1,130 @@
+---
+phase: 08-bugfixes-legacy-parity
+plan: 02
+subsystem: form-rendering-email-generation
+tags: [wordpress, forms, email, legacy-parity, data-extraction]
+
+# Dependency graph
+requires:
+  - phase: 02-data-extraction
+    provides: Additional work sections data structure in class-furniture-data.php
+  - phase: 04-form-renderer
+    provides: Form rendering patterns for sections
+  - phase: 06-email-generator
+    provides: Email generation patterns for HTML tables
+  - phase: 08-01
+    provides: Fixed form_id for proper error handling
+provides:
+  - Complete form rendering of 6 additional work sections (32 fields total)
+  - Sonstiges free text field for customer notes
+  - Email generation for additional work in legacy HTML table format
+  - Sanitization and CPT storage for all additional work data
+affects: [any future additional field types, email customization]
+
+# Tech tracking
+tech-stack:
+  added: []
+  patterns:
+    - "Field type dispatch pattern: checkbox, abbau_aufbau, checkbox_anzahl, text"
+    - "Field key generation: explicit 'key' property or sanitize_title(name)"
+    - "Additional work naming: additional_work[section][field_key]"
+    - "Conditional email sections: only include if has_additional_work_data()"
+
+key-files:
+  created: []
+  modified:
+    - includes/class-form-renderer.php
+    - includes/class-form-handler.php
+    - includes/class-email-generator.php
+    - assets/css/form.css
+
+key-decisions:
+  - "Use sanitize_key() for array keys (section/field), sanitize_text_field() for values"
+  - "Use sanitize_textarea_field() for Sonstiges to preserve newlines"
+  - "Field key from explicit 'key' property or sanitize_title(field name)"
+  - "Omit empty sections from email (matches room section pattern)"
+  - "Additional work sections between rooms and grand totals in both form and email"
+
+patterns-established:
+  - "Field type dispatch in render: switch on field['type']"
+  - "Email conditional sections: has_data check before rendering"
+  - "Legacy email table format: bgcolor='#CCCCCC' for consistency"
+
+# Metrics
+duration: 2min
+completed: 2026-02-06
+---
+
+# Phase 8 Plan 2: Additional Work & Sonstiges Summary
+
+**Integrated 6 additional work sections (32 fields: checkboxes, radio groups, text inputs) and Sonstiges textarea into form, handler, and email generator for full legacy parity**
+
+## Performance
+
+- **Duration:** 2 min
+- **Started:** 2026-02-06T14:05:07Z
+- **Completed:** 2026-02-06T14:07:34Z
+- **Tasks:** 2
+- **Files modified:** 4
+
+## Accomplishments
+- Rendered 6 additional work sections in form (Montage, Schrank, Elektriker, Dübelarbeiten, Packarbeiten, Anfahrt)
+- Rendered Sonstiges free text textarea after additional work sections
+- Implemented 4 field types: checkbox, abbau_aufbau (radio), checkbox_anzahl, text
+- Sanitized all additional work data with appropriate WordPress functions
+- Generated legacy HTML email tables for additional work sections
+- Generated Sonstiges email section with line break preservation
+- Styled additional work sections and Sonstiges for visual consistency
+
+## Task Commits
+
+Each task was committed atomically:
+
+1. **Task 1: Render additional work sections and Sonstiges in the form** - `d0edef9` (feat)
+2. **Task 2: Sanitize additional work data and generate email sections** - `270349b` (feat)
+
+**Plan metadata:** (will be committed separately with STATE.md)
+
+## Files Created/Modified
+- `includes/class-form-renderer.php` - Added render_additional_work_sections(), render_additional_work_section(), render_sonstiges_field(), get_field_key() methods
+- `includes/class-form-handler.php` - Added sanitization for additional_work array and sonstiges textarea
+- `includes/class-email-generator.php` - Added generate_additional_work_sections(), has_additional_work_data(), generate_sonstiges_section() methods
+- `assets/css/form.css` - Added styling for additional-work-section and sonstiges-textarea
+
+## Decisions Made
+- **Field key generation from explicit 'key' or sanitized name:** Anfahrt section has explicit keys like 'LKWBeladestelle', others use sanitize_title(field name) for clean POST structure
+- **Additional work sections between rooms and grand totals:** Matches legacy form placement for office staff familiarity
+- **Empty sections omitted from email:** Keeps email clean like room section pattern (only show sections with data)
+- **Use sanitize_textarea_field() for Sonstiges:** Preserves newlines for multi-line customer notes while sanitizing
+
+## Deviations from Plan
+
+None - plan executed exactly as written.
+
+## Issues Encountered
+
+None - straightforward implementation following established patterns.
+
+## User Setup Required
+
+None - all changes are internal to the plugin.
+
+## Next Phase Readiness
+
+Additional work integration complete. All legacy form fields now integrated:
+- ✅ 7 room furniture sections with 197 items (Phase 4-5)
+- ✅ Customer info fields (Phase 4)
+- ✅ 6 additional work sections with 32 fields (this plan)
+- ✅ Sonstiges free text field (this plan)
+
+Ready for Phase 9 (Internationalization) or any future enhancements.
+
+Technical notes for future work:
+- Field type dispatch pattern can accommodate new field types easily
+- Email conditional section pattern prevents bloat (only show non-empty sections)
+- The additional_work[section][field] naming pattern keeps POST data organized
+- Field key generation helper (get_field_key) makes it easy to handle fields with or without explicit keys
+
+---
+*Phase: 08-bugfixes-legacy-parity*
+*Completed: 2026-02-06*