feat: enhance user confirmation and data submission; add newEntry function and update MainForm to handle user selection

backend/scheme.sql

@@ -1,14 +1,4 @@
 CREATE TABLE users (
-    id INT AUTO_INCREMENT PRIMARY KEY,
-    username VARCHAR(100) NOT NULL,
-    first_name VARCHAR(100) NOT NULL,
-    last_name VARCHAR(100) NOT NULL,
-    email VARCHAR(255) NOT NULL UNIQUE,
-    unique_key CHAR(25) NOT NULL UNIQUE,
-    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
-);
-
-CREATE TABLE usersNEW (
     id INT AUTO_INCREMENT PRIMARY KEY,
     username VARCHAR(100) NOT NULL UNIQUE,
     first_name VARCHAR(100) NOT NULL,
@@ -16,17 +6,20 @@ CREATE TABLE usersNEW (
     created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
 );
 
--- Trigger zur automatischen Generierung eines 25‑stelligen Keys
-DELIMITER $
-
-CREATE TRIGGER before_user_insert
-BEFORE INSERT ON users
-FOR EACH ROW
-BEGIN
-    SET NEW.unique_key = SUBSTRING(
-        REPLACE(UUID(), '-', '')
-        -- UUID = 32 Zeichen, wir nehmen 25 davon
-    , 1, 25);
-END$
-
-DELIMITER ;
+CREATE TABLE xx_DD_MM_YYYY (
+    id INT AUTO_INCREMENT PRIMARY KEY,
+    Vorname VARCHAR(100) NOT NULL,
+    Nachname Varchar(100) NOT NULL,
+    EMail Varchar(100) NOT NULL,
+    Telefonnummer Varchar(100) NOT NULL,
+    Lose INT NOT NULL,
+    Firmenname Varchar(100),
+    Vorname_Geschaeftlich Varchar(100),
+    Nachname_Geschaeftlich Varchar(100),
+    EMail_Geschaeftlich Varchar(100),
+    Telefonnummer_Geschaeftlich Varchar(100),
+    Strasse_Hausnr Varchar(100),
+    Plz_Ort Varchar(100),
+    Zahlungsmethode Varchar(100),
+    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
+);