Add changelog and roadmap updates for v2026-02-11.19

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

Author: Dennis Braun

CHANGELOG.md

@@ -4,6 +4,22 @@ All notable changes to this project will be documented in this file.
 
 Versioning: `YYYY-MM-DD.N` (date + sequential build number per day)
 
+## [2026-02-11.19]
+
+### Added
+- **Incident Report Export**: Two-step flow — editable ISP complaint letter with customer data fields + downloadable technical PDF report with channel tables, worst values, and DIN threshold references
+- **Report i18n**: Full PDF report localization in 4 languages (EN/DE/FR/ES) with locale-appropriate regulatory authorities (Bundesnetzagentur, ARCEP, etc.)
+- **Language selector in topbar**: Country flag dropdown (🇬🇧🇩🇪🇫🇷🇪🇸) for quick language switching
+- **BQM setup guide**: Sidebar link always visible; when not configured, opens modal with benefits and step-by-step setup instructions (DynDNS, WAN ping, ThinkBroadband registration)
+- **Bundled DejaVu fonts**: PDF generation works in Docker without host font dependencies
+
+### Changed
+- **Settings moved to sidebar bottom**: Following common UI convention
+- **Report modal redesign**: Split into complaint letter (copyable text) + technical report (PDF attachment) for easier ISP communication
+
+### Fixed
+- **BQM modal HTML rendering**: i18n strings with HTML tags now render correctly via Jinja2 safe filter
+
 ## [2026-02-09.18]
 
 ### Added

README.md

@@ -165,7 +165,7 @@ DOCSight can optionally publish all channel data to Home Assistant via MQTT Auto
 - [ ] **Adaptive Polling**: Automatically increase poll frequency (e.g. every 10-30s) when uncorrectable errors spike, to capture incidents in high resolution
 
 ### Diagnosis & Reporting
-- [ ] **Incident Report Export**: One-click PDF/report with worst modulation values, max power levels, error sums, and auto-generated ISP complaint text referencing DIN thresholds
+- [x] **Incident Report Export**: Two-step flow — editable ISP complaint letter with customer data fields + downloadable technical PDF with channel tables, worst values, and DIN threshold references (EN/DE/FR/ES)
 - [ ] **Ping Correlation**: Built-in latency monitor (ping to Google/Cloudflare) overlaid on error graphs to prove causality between physical layer issues and packet loss
 - [ ] **Before/After Comparison**: Side-by-side overlay of two time periods (e.g. week before vs. after technician visit) to quantify improvements
 - [ ] **FritzBox Event Log Parser**: Extract and display T3/T4 Timeout events, Ranging Request failures, and other DOCSIS error codes from the modem's event log