Add pricing system with tiers, seasons, and calculator (v0.2.0)

- Create PricingTier enum for short/mid/long-term pricing
- Add Season class for seasonal pricing with date ranges
- Implement Calculator for price calculations with breakdown
- Add pricing meta box to Room post type
- Create Seasons admin page for managing seasonal pricing
- Add Pricing settings tab with tier thresholds
- Support weekend surcharges and configurable weekend days
- Add price column to room list admin

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

CHANGELOG.md

@@ -5,6 +5,50 @@ All notable changes to this project 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).
 
+## [0.2.0] - 2026-01-31
+
+### Added
+
+- Pricing System with three tiers:
+  - Short-term (nightly) pricing for stays up to 6 nights
+  - Mid-term (weekly) pricing for stays 7-27 nights
+  - Long-term (monthly) pricing for stays 28+ nights
+- PricingTier enum class with automatic tier detection
+- Season class for seasonal pricing management
+  - Date range support (MM-DD format)
+  - Year-spanning seasons (e.g., winter holidays Dec-Jan)
+  - Price modifier (multiplier) per season
+  - Priority system for overlapping seasons
+  - Active/inactive status toggle
+- Calculator class for price calculations
+  - Automatic tier detection based on stay duration
+  - Seasonal price adjustments
+  - Weekend surcharge support
+  - Price breakdown for detailed invoicing
+  - Currency formatting with symbol/suffix support
+- Pricing meta box on Room edit screen
+  - Base prices for each tier (nightly, weekly, monthly)
+  - Weekend surcharge field
+  - Link to pricing settings
+- Pricing Settings tab in plugin settings
+  - Configurable tier thresholds
+  - Weekend days selection
+  - Quick view of configured seasons
+- Seasons admin page (WP BnB > Seasons)
+  - List view with all seasons
+  - Add/Edit season form
+  - Delete confirmation
+  - Create default seasons option
+- Price column in room list admin
+- Admin CSS for pricing UI
+- Admin JavaScript for pricing interactions
+
+### Changed
+
+- Room post type now includes pricing fields
+- Plugin settings page has new Pricing tab
+- Enhanced asset localization with pricing i18n strings
+
 ## [0.1.0] - 2026-01-31
 
 ### Added
@@ -80,5 +124,6 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Input sanitization and output escaping
 - Server secret masking in license settings
 
+[0.2.0]: https://src.bundespruefstelle.ch/magdev/wp-bnb/releases/tag/v0.2.0
 [0.1.0]: https://src.bundespruefstelle.ch/magdev/wp-bnb/releases/tag/v0.1.0
 [0.0.1]: https://src.bundespruefstelle.ch/magdev/wp-bnb/releases/tag/v0.0.1