feat: add Apple Liquid Glass templates, image security settings, and automated releases

## New Features
- Apple Liquid Glass CSS template with iOS 26-inspired design
- Liquid Glass Dark theme with neon accents
- Image Security settings tab with per-event protection levels
- Release Please automation for versioning and changelog

## Improvements
- Update CSS template migration with final working templates
- Add search placeholder visibility fix for glass themes
- Update README roadmap (Download Protection, Gallery Templates, Filtering & Export now implemented)

## Infrastructure
- Add release-please.yml workflow for automated releases
- Add release-please-config.json and manifest
- Update docker-build.yml with Release Please integration comments
- Add comprehensive CHANGELOG.md

## Cleanup
- Add working/planning docs to .gitignore (CLAUDE.md, test-*.md, feature-*.md, etc.)
- Remove internal planning documents from git tracking (kept locally)

## Files Added
- .github/workflows/release-please.yml
- .release-please-manifest.json
- release-please-config.json
- CHANGELOG.md
- frontend/src/features/settings/tabs/ImageSecurityTab.tsx

CHANGELOG.md

@@ -0,0 +1,63 @@
+# Changelog
+
+All notable changes to PicPeak will be documented in this file.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
+and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+
+## [1.2.0](https://github.com/the-luap/picpeak/compare/v1.1.15...v1.2.0) (2026-01-03)
+
+### Features
+
+* **Event Rename**: Safe event renaming with automatic slug updates, old URL redirects via `slug_redirects` table, and optional email notifications to clients
+* **Optional Event Fields**: Make customer name, email, and admin email fields optional via admin settings with "(optional)" labels in forms
+* **Photo Filtering**: Filter photos by rating, likes, favorites, and comments with a new PhotoFilterPanel component
+* **Photo Export**: Export filtered photo selections as ZIP, generate Capture One/Lightroom-compatible XMP sidecar files, or export metadata lists
+* **Custom CSS Templates**: 3 customizable CSS template slots with live preview, XSS-safe sanitization, and per-event template assignment
+* **Apple Liquid Glass Theme**: Starter CSS template inspired by iOS 26 / macOS Tahoe Liquid Glass design with glass morphism effects, Apple SF Pro fonts, and responsive layout
+* **Liquid Glass Dark Theme**: Neon-accented dark glass theme with animated gradient backgrounds
+* **Image Security Settings**: Per-event download protection with configurable protection levels (basic, standard, enhanced, maximum), canvas rendering, DevTools detection, and right-click prevention
+* **Automated Releases**: Release Please integration for automatic versioning, changelog generation, and GitHub releases that trigger Docker image builds
+
+### Bug Fixes
+
+* **Date Parsing**: Fix event date formatting in slugs (now uses YYYY-MM-DD format correctly)
+* **Search Placeholder**: Fix search field placeholder visibility in glass-styled sidebar
+* **Vite Proxy**: Fix Vite dev server proxy port configuration
+* **Photo Export Button**: Fix export button staying disabled when photos are selected
+* **Boolean Parsing**: Fix boolean parsing in publicSettings.js for optional fields
+* **Translation Keys**: Add missing `common.optional` translation key in locales
+
+### Security
+
+* Fix critical vulnerabilities and harden application security
+* Add CSS sanitizer utility blocking XSS vectors in custom templates
+* Implement secure gallery CSS endpoint for template delivery
+
+### Code Refactoring
+
+* Add Photo and Settings service layers for better code organization
+* Phase 1 code consolidation with service layer architecture
+* Modular settings page with feature-based tab components
+* Create photoFilterBuilder utility for query construction
+* Add eventRenameService for safe event operations
+
+### Documentation
+
+* Add comprehensive REFACTORING_PLAN.md for codebase improvement roadmap
+* Update README roadmap with implemented features (Download Protection, Gallery Templates, Filtering & Export)
+* Add test specification documents for all new features
+
+### Database Migrations
+
+* `049_add_slug_redirects.js` - Store old slugs for URL redirects after rename
+* `050_add_optional_event_fields_settings.js` - Settings for optional form fields
+* `051_add_photo_filter_indexes.js` - Performance indexes for photo filtering
+* `052_add_css_templates.js` - CSS template storage with 3 slots
+* `053_add_liquid_glass_templates.js` - Apple Liquid Glass and Dark theme starter templates
+
+---
+
+## [1.1.15] - Previous Release
+
+Initial stable release with core functionality.