Implement bill forwarding strategy with radio button persistence

Added billFwdStrategy field to store user's choice for when to forward
utility bills to tenants, with database persistence and UI updates.

Changes:
- Added billFwdStrategy field to BillingLocation interface ("when-payed" | "when-attached")
- Updated FormSchema to validate billFwdStrategy enum values
- Modified updateOrAddLocation to persist billFwdStrategy in all database operations
- Defaults to "when-payed" (first option) when no value exists in database
- Updated LocationEditForm radio buttons to use persisted database values
- Radio button selection is preserved across edits and restored from database
- Renamed autoTenantNotification to autoBillFwd throughout codebase
- Updated localization strings for bill forwarding features

Form behavior:
- New locations: "when-payed" radio selected by default
- Existing locations: Radio selection matches stored database value
- Value persisted in current, subsequent, and all month update operations

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

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

app/lib/actions/locationActions.ts

@@ -20,6 +20,7 @@ export type State = {
         tenantLastName?: string[];
         autoBillFwd?: string[];
         tenantEmail?: string[];
+        billFwdStrategy?: string[];
     };
     message?:string | null;
 };
@@ -37,6 +38,7 @@ const FormSchema = (t:IntlTemplateFn) => z.object({
     tenantLastName: z.string().optional().nullable(),
     autoBillFwd: z.boolean().optional().nullable(),
     tenantEmail: z.string().email(t("tenant-email-invalid")).optional().or(z.literal("")).nullable(),
+    billFwdStrategy: z.enum(["when-payed", "when-attached"]).optional().nullable(),
     addToSubsequentMonths: z.boolean().optional().nullable(),
     updateScope: z.enum(["current", "subsequent", "all"]).optional().nullable(),
   })
@@ -92,6 +94,7 @@ export const updateOrAddLocation = withUser(async (user:AuthenticatedUser, locat
         tenantLastName: formData.get('tenantLastName') || null,
         autoBillFwd: formData.get('autoBillFwd') === 'on',
         tenantEmail: formData.get('tenantEmail') || null,
+        billFwdStrategy: formData.get('billFwdStrategy') as "when-payed" | "when-attached" | undefined,
         addToSubsequentMonths: formData.get('addToSubsequentMonths') === 'on',
         updateScope: formData.get('updateScope') as "current" | "subsequent" | "all" | undefined,
     });
@@ -112,6 +115,7 @@ export const updateOrAddLocation = withUser(async (user:AuthenticatedUser, locat
         tenantLastName,
         autoBillFwd,
         tenantEmail,
+        billFwdStrategy,
         addToSubsequentMonths,
         updateScope,
     } = validatedFields.data;
@@ -150,6 +154,7 @@ export const updateOrAddLocation = withUser(async (user:AuthenticatedUser, locat
                         tenantLastName: tenantLastName || null,
                         autoBillFwd: autoBillFwd || false,
                         tenantEmail: tenantEmail || null,
+                        billFwdStrategy: billFwdStrategy || "when-payed",
                     }
                 }
             );
@@ -176,6 +181,7 @@ export const updateOrAddLocation = withUser(async (user:AuthenticatedUser, locat
                         tenantLastName: tenantLastName || null,
                         autoBillFwd: autoBillFwd || false,
                         tenantEmail: tenantEmail || null,
+                        billFwdStrategy: billFwdStrategy || "when-payed",
                     }
                 }
             );
@@ -195,6 +201,7 @@ export const updateOrAddLocation = withUser(async (user:AuthenticatedUser, locat
                         tenantLastName: tenantLastName || null,
                         autoBillFwd: autoBillFwd || false,
                         tenantEmail: tenantEmail || null,
+                        billFwdStrategy: billFwdStrategy || "when-payed",
                     }
                 }
             );
@@ -212,6 +219,7 @@ export const updateOrAddLocation = withUser(async (user:AuthenticatedUser, locat
             tenantLastName: tenantLastName || null,
             autoBillFwd: autoBillFwd || false,
             tenantEmail: tenantEmail || null,
+            billFwdStrategy: billFwdStrategy || "when-payed",
             yearMonth: yearMonth,
             bills: [],
         });
@@ -281,6 +289,7 @@ export const updateOrAddLocation = withUser(async (user:AuthenticatedUser, locat
                         tenantLastName: tenantLastName || null,
                         autoBillFwd: autoBillFwd || false,
                         tenantEmail: tenantEmail || null,
+                        billFwdStrategy: billFwdStrategy || "when-payed",
                         yearMonth: { year: monthData.year, month: monthData.month },
                         bills: [],
                     });

app/lib/db-types.ts

@@ -53,6 +53,8 @@ export interface BillingLocation {
     autoBillFwd?: boolean | null;
     /** (optional) tenant email */
     tenantEmail?: string | null;
+    /** (optional) bill forwarding strategy */
+    billFwdStrategy?: "when-payed" | "when-attached" | null;
 };
 
 export enum BilledTo {