feat: add email recipient history to user settings and implement management in InboxDetailPage

paperless-backend/src/database/entities/user-settings.entity.ts

@@ -31,4 +31,7 @@ export class UserSettings {
 
   @Column({ type: 'int', nullable: true })
   DefaultLabelTemplateId!: number | null;
+
+  @Column({ type: 'json', nullable: true })
+  EmailRecipientHistory!: string[] | null;
 }

paperless-backend/src/user-settings/user-settings.service.ts

@@ -18,6 +18,7 @@ export interface UserSettingsDto {
   smtpFromName: string | null;
   mailSignatureHtml: string | null;
   defaultLabelTemplateId: number | null;
+  emailRecipientHistory: string[] | null;
 }
 
 @Injectable()
@@ -80,6 +81,7 @@ export class UserSettingsService {
       smtpFromName?: string | null;
       mailSignatureHtml?: string | null;
       defaultLabelTemplateId?: number | null;
+      emailRecipientHistory?: string[] | null;
     },
   ): Promise<UserSettingsDto> {
     let entity = await this.repo.findOne({ where: { UserId: userId } });
@@ -98,6 +100,7 @@ export class UserSettingsService {
     if (data.smtpFromName !== undefined) entity.SmtpFromName = data.smtpFromName;
     if (data.mailSignatureHtml !== undefined) entity.MailSignatureHtml = data.mailSignatureHtml;
     if (data.defaultLabelTemplateId !== undefined) entity.DefaultLabelTemplateId = data.defaultLabelTemplateId;
+    if (data.emailRecipientHistory !== undefined) entity.EmailRecipientHistory = data.emailRecipientHistory;
 
     await this.repo.save(entity);
     return this.toDto(entity);
@@ -168,6 +171,7 @@ export class UserSettingsService {
       smtpFromName: entity?.SmtpFromName ?? null,
       mailSignatureHtml: entity?.MailSignatureHtml ?? null,
       defaultLabelTemplateId: entity?.DefaultLabelTemplateId ?? null,
+      emailRecipientHistory: entity?.EmailRecipientHistory ?? null,
     };
   }
 }

paperless-frontend/src/api/userSettings.ts

@@ -10,6 +10,7 @@ export interface UserSettingsData {
   smtpFromName: string | null;
   mailSignatureHtml: string | null;
   defaultLabelTemplateId: number | null;
+  emailRecipientHistory: string[] | null;
 }
 
 export interface SenderOption {

paperless-frontend/src/pages/InboxDetailPage.tsx

@@ -659,6 +659,7 @@ function SendEmailDialog({ open, fileId, fileName, documents, thumbUrls, onClose
   const [filenames, setFilenames] = useState<string[]>([]);
   const [senders, setSenders] = useState<SenderOption[]>([]);
   const [selectedSender, setSelectedSender] = useState<string>('default');
+  const [recipientHistory, setRecipientHistory] = useState<string[]>([]);
   const editorRef = useRef<WysiwygEditorHandle>(null);
 
   useEffect(() => {
@@ -672,6 +673,7 @@ function SendEmailDialog({ open, fileId, fileName, documents, thumbUrls, onClose
     );
     userSettingsApi.get().then((settings) => {
       editorRef.current?.setContent(settings.mailSignatureHtml ?? '');
+      setRecipientHistory(settings.emailRecipientHistory ?? []);
     }).catch(() => {});
     userSettingsApi.getSenders().then((s) => {
       setSenders(s);
@@ -679,12 +681,21 @@ function SendEmailDialog({ open, fileId, fileName, documents, thumbUrls, onClose
     }).catch(() => setSenders([]));
   }, [open, documents, fileName, form]);
 
+  const removeRecipient = (addr: string, e: React.MouseEvent) => {
+    e.preventDefault();
+    e.stopPropagation();
+    const updated = recipientHistory.filter((a) => a !== addr);
+    setRecipientHistory(updated);
+    userSettingsApi.update({ emailRecipientHistory: updated }).catch(() => {});
+  };
+
   const handleOk = async () => {
     try {
       const values = await form.validateFields();
       setSubmitting(true);
+      const addresses: string[] = values.to ?? [];
       await inboxApi.sendEmail(fileId, {
-        to: values.to,
+        to: addresses.join(', '),
         subject: values.subject,
         body: editorRef.current?.getText() ?? '',
         html: editorRef.current?.getHTML(),
@@ -694,6 +705,12 @@ function SendEmailDialog({ open, fileId, fileName, documents, thumbUrls, onClose
         })),
         sender: senders.length > 1 ? selectedSender : undefined,
       });
+      const updated = [
+        ...addresses,
+        ...recipientHistory.filter((a) => !addresses.includes(a)),
+      ].slice(0, 20);
+      setRecipientHistory(updated);
+      userSettingsApi.update({ emailRecipientHistory: updated }).catch(() => {});
       message.success('E-Mail wurde gesendet');
       onClose();
     } catch (err: any) {
@@ -726,8 +743,36 @@ function SendEmailDialog({ open, fileId, fileName, documents, thumbUrls, onClose
             />
           </Form.Item>
         )}
-        <Form.Item name="to" label="Empfänger" rules={[{ required: true, message: 'Bitte Empfänger angeben' }, { type: 'email', message: 'Ungültige E-Mail-Adresse' }]}>
+        <Form.Item
-          <Input placeholder="empfaenger@beispiel.de" />
+          name="to"
+          label="Empfänger"
+          rules={[{
+            validator: (_: unknown, value: string[]) => {
+              if (!value?.length) return Promise.reject('Bitte mindestens einen Empfänger angeben');
+              const re = /^[^\s@]+@[^\s@]+\.[^\s@]+$/;
+              const bad = value.find((v) => !re.test(v));
+              return bad ? Promise.reject(`Ungültige Adresse: ${bad}`) : Promise.resolve();
+            },
+          }]}
+        >
+          <Select
+            mode="tags"
+            placeholder="empfaenger@beispiel.de"
+            tokenSeparators={[',', ';']}
+            options={recipientHistory.map((addr) => ({ value: addr, label: addr }))}
+            optionRender={(option) => (
+              <div style={{ display: 'flex', justifyContent: 'space-between', alignItems: 'center', gap: 8 }}>
+                <span>{option.label}</span>
+                <Button
+                  type="text"
+                  size="small"
+                  icon={<DeleteOutlined />}
+                  onClick={(e) => removeRecipient(option.value as string, e)}
+                />
+              </div>
+            )}
+            notFoundContent={<span style={{ color: '#999', fontSize: 12 }}>Kein Verlauf vorhanden</span>}
+          />
         </Form.Item>
         <Form.Item name="subject" label="Betreff" rules={[{ required: true, message: 'Bitte Betreff angeben' }]}>
           <Input />