fix: Rich-Markup-Fehler bei leeren Styles + Telefonnummer-Normalisierung

- _render_message: leeren style-Tag vermieden (MarkupError bei inbound-Msgs)
- Nachrichtentext: eckige Klammern werden escaped (kein Markup-Injection)
- get_by_phone: sucht +49xxx und 49xxx gleichzeitig (Green API liefert ohne +)

services/contact_service.py

@@ -19,11 +19,14 @@ def get_by_telegram_id(db: Session, telegram_id: str) -> Contact | None:
 
 
 def get_by_phone(db: Session, phone: str) -> Contact | None:
-    return (
-        db.query(Contact)
-        .filter((Contact.phone == phone) | (Contact.whatsapp_phone == phone))
-        .first()
-    )
+    # Normalisierung: mit und ohne führendes + suchen
+    variants = {phone, "+" + phone.lstrip("+"), phone.lstrip("+")}
+    from sqlalchemy import or_
+    conditions = or_(*(
+        (Contact.phone == v) | (Contact.whatsapp_phone == v)
+        for v in variants
+    ))
+    return db.query(Contact).filter(conditions).first()
 
 
 def create(db: Session, data: ContactCreate) -> Contact:

tui/screens/main_screen.py

@@ -143,11 +143,11 @@ class MainScreen(Screen):
         direction = msg.get("direction", "outbound")
         direction_prefix = "▶ " if direction == "outbound" else "◀ "
         status_suffix = " ✗" if msg.get("status") == "failed" else ""
-        style = "dim" if direction == "outbound" else ""
-        text = msg.get("text", "")
-        log.write(
-            f"[dim]{ts}[/dim] [{style}]{direction_prefix}{text}{status_suffix}[/{style}]"
-        )
+        text = msg.get("text", "").replace("[", "\\[")
+        if direction == "outbound":
+            log.write(f"[dim]{ts}[/dim] [dim]{direction_prefix}{text}{status_suffix}[/dim]")
+        else:
+            log.write(f"[dim]{ts}[/dim] {direction_prefix}{text}{status_suffix}")
 
     # ── Background-Polling ─────────────────────────────────────────────────────