Add rent amount field to location form

- Add rentAmount field to BillingLocation interface (stored in cents)
- Implement Zod validation with conditional requirement when rent notification is enabled
- Add rent amount input field to LocationEditForm with decimal display
- Update all database operations to persist rentAmount
- Add localization strings for both English and Croatian
- Fix missing notes field in insertOne/insertMany operations

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

app/lib/actions/locationActions.ts

@@ -22,6 +22,7 @@ export type State = {
         billFwdStrategy?: string[];
         rentDueNotification?: string[];
         rentDueDay?: string[];
+        rentAmount?: string[];
     };
     message?:string | null;
 };
@@ -41,6 +42,7 @@ const FormSchema = (t:IntlTemplateFn) => z.object({
     billFwdStrategy: z.enum(["when-payed", "when-attached"]).optional().nullable(),
     rentDueNotification: z.boolean().optional().nullable(),
     rentDueDay: z.coerce.number().min(1).max(31).optional().nullable(),
+    rentAmount: z.coerce.number().positive(t("rent-amount-positive")).optional().nullable(),
     addToSubsequentMonths: z.boolean().optional().nullable(),
     updateScope: z.enum(["current", "subsequent", "all"]).optional().nullable(),
   })
@@ -73,6 +75,15 @@ const FormSchema = (t:IntlTemplateFn) => z.object({
   }, {
     message: t("tenant-email-required"),
     path: ["tenantEmail"],
+  })
+  .refine((data) => {
+    if (data.rentDueNotification) {
+      return !!data.rentAmount && data.rentAmount > 0;
+    }
+    return true;
+  }, {
+    message: t("rent-amount-required"),
+    path: ["rentAmount"],
   });
 
 /**
@@ -98,6 +109,7 @@ export const updateOrAddLocation = withUser(async (user:AuthenticatedUser, locat
         billFwdStrategy: formData.get('billFwdStrategy') as "when-payed" | "when-attached" | undefined,
         rentDueNotification: formData.get('rentDueNotification') === 'on',
         rentDueDay: formData.get('rentDueDay') || null,
+        rentAmount: formData.get('rentAmount') || null,
         addToSubsequentMonths: formData.get('addToSubsequentMonths') === 'on',
         updateScope: formData.get('updateScope') as "current" | "subsequent" | "all" | undefined,
     });
@@ -120,6 +132,7 @@ export const updateOrAddLocation = withUser(async (user:AuthenticatedUser, locat
         billFwdStrategy,
         rentDueNotification,
         rentDueDay,
+        rentAmount,
         addToSubsequentMonths,
         updateScope,
     } = validatedFields.data;
@@ -160,6 +173,7 @@ export const updateOrAddLocation = withUser(async (user:AuthenticatedUser, locat
                         billFwdStrategy: billFwdStrategy || "when-payed",
                         rentDueNotification: rentDueNotification || false,
                         rentDueDay: rentDueDay || null,
+                        rentAmount: rentAmount || null,
                     }
                 }
             );
@@ -188,6 +202,7 @@ export const updateOrAddLocation = withUser(async (user:AuthenticatedUser, locat
                         billFwdStrategy: billFwdStrategy || "when-payed",
                         rentDueNotification: rentDueNotification || false,
                         rentDueDay: rentDueDay || null,
+                        rentAmount: rentAmount || null,
                     }
                 }
             );
@@ -209,6 +224,7 @@ export const updateOrAddLocation = withUser(async (user:AuthenticatedUser, locat
                         billFwdStrategy: billFwdStrategy || "when-payed",
                         rentDueNotification: rentDueNotification || false,
                         rentDueDay: rentDueDay || null,
+                        rentAmount: rentAmount || null,
                     }
                 }
             );
@@ -220,6 +236,7 @@ export const updateOrAddLocation = withUser(async (user:AuthenticatedUser, locat
             userId,
             userEmail,
             name: locationName,
+            notes: null,
             generateTenantCode: generateTenantCode || false,
             tenantFirstName: tenantFirstName || null,
             tenantLastName: tenantLastName || null,
@@ -228,6 +245,7 @@ export const updateOrAddLocation = withUser(async (user:AuthenticatedUser, locat
             billFwdStrategy: billFwdStrategy || "when-payed",
             rentDueNotification: rentDueNotification || false,
             rentDueDay: rentDueDay || null,
+            rentAmount: rentAmount || null,
             yearMonth: yearMonth,
             bills: [],
         });
@@ -291,6 +309,7 @@ export const updateOrAddLocation = withUser(async (user:AuthenticatedUser, locat
                         userId,
                         userEmail,
                         name: locationName,
+                        notes: null,
                         generateTenantCode: generateTenantCode || false,
                         tenantFirstName: tenantFirstName || null,
                         tenantLastName: tenantLastName || null,
@@ -299,6 +318,7 @@ export const updateOrAddLocation = withUser(async (user:AuthenticatedUser, locat
                         billFwdStrategy: billFwdStrategy || "when-payed",
                         rentDueNotification: rentDueNotification || false,
                         rentDueDay: rentDueDay || null,
+                        rentAmount: rentAmount || null,
                         yearMonth: { year: monthData.year, month: monthData.month },
                         bills: [],
                     });

app/lib/db-types.ts

@@ -61,6 +61,8 @@ export interface BillingLocation {
     rentDueNotification?: boolean | null;
     /** (optional) day of month when rent is due (1-31) */
     rentDueDay?: number | null;
+    /** (optional) monthly rent amount in cents */
+    rentAmount?: number | null;
 };
 
 export enum BilledTo {