feat: erweiterte Chat-Funktionalität, UI-Verbesserungen und Lokalisierungsupdates

- Chat: Nachrichten-Status (read/unread), WebSocket-Verbesserungen
- App: Login-Optimierung, Job-Übersicht verbessert, neue Übersetzungen
- Backend: Dialog-Styling, Invoice-Generator, Job-Verwaltung erweitert
- Mehrsprachigkeit: Neue Übersetzungen für DE, EN, ES, ET, FR, LT, LV, PL, RU, TR

backend/src/main/resources/messages_en.properties

@@ -18,6 +18,8 @@ nav.users=Users
 nav.showprofile=Show Profile
 nav.settings=Settings
 nav.logout=Log Out
+logout.confirm.title=Confirm logout
+logout.confirm.message=Do you really want to log out?
 
 # Profile View
 profile.title=Edit Profile
@@ -200,6 +202,10 @@ common.error=Error
 common.success=Success
 common.required=Required
 
+# Duration
+duration.hours.short=hr
+duration.minutes.short=min
+
 # Validation
 validation.required=Field is required
 validation.email=Invalid email address
@@ -603,6 +609,7 @@ jobsummary.task.photo.maxonly=Maximum {0} photos allowed
 jobsummary.task.photo.taken=Photos taken ({0})
 jobsummary.task.button.text=Button Text
 jobsummary.button.schliessen=Close
+jobsummary.route.planned=Planned Route
 
 # Jobs
 jobs.title=Jobs
@@ -730,6 +737,8 @@ statistics.loading=Calculating...
 # Job Status
 jobstatus.IN_PROGRESS=In Progress
 jobstatus.COMPLETED=Completed
+jobstatus.CREATED=Created
+jobstatus.CANCELLED=Cancelled
 
 # Task Types
 tasktype.CONFIRMATION=Confirmation
@@ -832,6 +841,15 @@ start.imprint.company=Assecutor Data Service GmbH
 start.imprint.address=Ottensener Str. 8, 22525 Hamburg
 start.imprint.phone=Phone: +49 40 18 123 771 0
 start.imprint.email=Email: ahoi@assecutor.de
+imprint.phone=Phone
+imprint.email=Email
+imprint.country=Germany
+imprint.management=Management
+imprint.registeredoffice=Registered Office
+imprint.commercialregister=Commercial Register
+imprint.vatid=VAT ID
+imprint.imagecredits=Image Credits for Pictures and Graphics Used
+imprint.backgroundimage=Homepage Background Image
 start.cta.text=Register today and use the free trial month to put the system through its paces.
 start.slogan=Run your business smart ... with votianLT!
 start.version=Version
@@ -914,6 +932,8 @@ jobhistory.info.createdat=Created on: {0}
 jobhistory.info.status=Status: {0}
 jobhistory.count={0} entries in history
 jobhistory.changedby=Changed by: {0}
+jobhistory.entry.create.reason=Job Created
+jobhistory.entry.create.description=New job was created: {0}
 
 # Version
 version.label=Version