🐛 v1.2.1: Markdown Initial Export Bugfix + URL Normalization + GitHub Workflow Fix

## 🐛 Fixed
- Initial Markdown export: Existing notes now exported when Desktop Integration activated
- Markdown directory structure: Files now land correctly in /notes-md/
- JSON URL normalization: Smart detection for both Root-URL and /notes-URL
- GitHub release notes: Fixed language order (DE primary, EN collapsible) and emoji

## ✨ Improved
- Settings UI: Example URL shows /notes instead of /webdav
- Server config: Enter only base URL (app adds /notes/ and /notes-md/ automatically)
- Flexible URL input: Both http://server/ and http://server/notes/ work
- Changelogs: Shortened for F-Droid 500 char limit

## 🔧 Technical
- getNotesUrl() helper with smart /notes/ detection
- getMarkdownUrl() simplified to use getNotesUrl()
- All JSON operations updated to use normalized URLs
- exportAllNotesToMarkdown() with progress callback
- Workflow: Swapped CHANGELOG_DE/EN, replaced broken emoji with 🌍

versionCode: 6
versionName: 1.2.1

.github/workflows/build-production-apk.yml

@@ -151,12 +151,12 @@ jobs:
             
             ## 📋 Changelog / Release Notes
             
-            ${{ env.CHANGELOG_EN }}
+            ${{ env.CHANGELOG_DE }}
             
             <details>
-            <summary>�🇪 Deutsche Version (zum Aufklappen)</summary>
+            <summary>🌍 English Version</summary>
             
-            ${{ env.CHANGELOG_DE }}
+            ${{ env.CHANGELOG_EN }}
             
             </details>