feat: add client-side validation utilities and debugging tools

- Implemented client-side validation functions for tax ID, VAT ID, IBAN, BIC, and website URL.
- Added debug logging functionality to assist in development.
- Created a comprehensive validation function for company form data.

feat: initialize database with Prisma migrations

- Added a server-side script to run Prisma migrations and check database health.
- Ensured safe initialization of the database to prevent concurrent migrations.

feat: comprehensive server-side error logging

- Developed an error logging system that captures detailed error context, including request details and stack traces.
- Implemented logging functions for different error types (route, action, database, API, startup).

fix: validate user ID existence in audit logs

- Updated the logging function to validate that the user ID exists in the database before logging actions.

fix: update schemas for optional fields and validation

- Modified schemas to allow for nullable fields and refined validation logic for tax ID, VAT ID, IBAN, and BIC.

feat: enhance error boundary for better debugging

- Improved error boundary to log detailed error information in development mode.
- Added a debug panel to the main application layout for real-time error tracking.

feat: implement company deletion functionality in admin routes

- Added a new API route for deleting companies with appropriate logging.
- Integrated delete confirmation in the admin interface for better user experience.

fix: handle API errors gracefully

- Wrapped API actions in try-catch blocks to log errors and return appropriate responses.

feat: generate and save invoice PDFs

- Implemented functionality to generate and save invoice PDFs upon status updates.
- Added a new column in the database for storing the URL of the generated PDF.

chore: update Docker image reference

- Changed the Docker image reference to point to the new Git repository.

chore: update package dependencies

- Added @radix-ui/react-tooltip for enhanced UI components.
- Updated package-lock.json to reflect new dependencies.

app/lib/schemas.ts

@@ -35,7 +35,7 @@ export const taxRateSchema = z
 export const ibanSchema = z
   .string()
   .refine(
-    (iban) => /^[A-Z]{2}\d{2}[A-Z0-9]{1,30}$/.test(iban),
+    (iban) => iban === "" || /^[A-Z]{2}\d{2}[A-Z0-9]{1,30}$/.test(iban),
     "Ungültige IBAN"
   );
 
@@ -44,14 +44,20 @@ export const ibanSchema = z
  */
 export const taxIdSchema = z
   .string()
-  .regex(/^\d{10}$/, "Steuernummer muss 10 Ziffern haben");
+  .refine(
+    (val) => val === "" || /^\d{10}$/.test(val),
+    "Steuernummer muss 10 Ziffern haben"
+  );
 
 /**
  * VAT ID (Umsatzsteuer-IdNr): DE + 9 digits
  */
 export const vatIdSchema = z
   .string()
-  .regex(/^DE\d{9}$/, "USt-IdNr. muss im Format DE + 9 Ziffern sein");
+  .refine(
+    (val) => val === "" || /^DE\d{9}$/.test(val),
+    "USt-IdNr. muss im Format DE + 9 Ziffern sein"
+  );
 
 // ===== Invoice Schemas =====
 
@@ -131,8 +137,8 @@ export const companySchema = z.object({
     .string()
     .max(100, "Rechtsform darf maximal 100 Zeichen sein")
     .optional(),
-  taxId: taxIdSchema.optional(),
-  vatId: vatIdSchema.optional(),
+  taxId: taxIdSchema.nullable(),
+  vatId: vatIdSchema.nullable(),
   address: z
     .string()
     .min(1, "Adresse erforderlich")
@@ -162,14 +168,22 @@ export const companySchema = z.object({
     .optional(),
   website: z
     .string()
-    .url("Ungültige URL")
+    .refine(
+      (val) => val === "" || /^https?:\/\//.test(val),
+      "Website muss mit http:// oder https:// beginnen"
+    )
     .max(255, "Website darf maximal 255 Zeichen sein")
-    .optional(),
-  bankIban: ibanSchema.optional(),
+    .optional()
+    .or(z.literal("")),
+  bankIban: ibanSchema.nullable(),
   bankBic: z
     .string()
-    .regex(/^[A-Z0-9]{8,11}$/, "Ungültiger BIC")
-    .optional(),
+    .refine(
+      (val) => val === "" || /^[A-Z0-9]{8,11}$/.test(val),
+      "Ungültiger BIC"
+    )
+    .optional()
+    .or(z.literal("")),
   bankName: z
     .string()
     .max(255, "Bankname darf maximal 255 Zeichen sein")