allow edit ticket name

csharp/App/Backend/Controller.cs

@@ -2241,6 +2241,20 @@ public class Controller : ControllerBase
         var existing = Db.GetTicketById(ticket.Id);
         if (existing is null) return NotFound();
 
+        // Subject is creator-only. Non-creators submitting a different Subject
+        // (typically a stale client-side view during a concurrent edit) are
+        // silently coerced to the existing value rather than 403'd, so an
+        // unrelated update (status, assignee, ...) never fails on a stale subject.
+        if (existing.CreatedByUserId != user.Id)
+        {
+            ticket.Subject = existing.Subject;
+        }
+        else if (String.IsNullOrWhiteSpace(ticket.Subject))
+        {
+            return BadRequest("Subject is required.");
+        }
+        var subjectChanged = !String.Equals(ticket.Subject, existing.Subject);
+
         // Enforce resolution when resolving
         if (ticket.Status == (Int32)TicketStatus.Resolved
             && (String.IsNullOrWhiteSpace(ticket.RootCause) || String.IsNullOrWhiteSpace(ticket.Solution)))
@@ -2248,6 +2262,8 @@ public class Controller : ControllerBase
             return BadRequest("Root Cause and Solution are required to resolve a ticket.");
         }
 
+        var oldSubject = existing.Subject;
+
         ticket.CreatedAt       = existing.CreatedAt;
         ticket.CreatedByUserId = existing.CreatedByUserId;
         ticket.UpdatedAt       = DateTime.UtcNow;
@@ -2344,7 +2360,22 @@ public class Controller : ControllerBase
                 });
         }
 
-        return Db.Update(ticket) ? ticket : StatusCode(500, "Update failed.");
+        if (!Db.Update(ticket)) return StatusCode(500, "Update failed.");
+
+        if (subjectChanged)
+        {
+            Db.Create(new TicketTimelineEvent
+            {
+                TicketId    = ticket.Id,
+                EventType   = (Int32)TimelineEventType.SubjectChanged,
+                Description = $"Subject changed: \"{oldSubject}\" → \"{ticket.Subject}\".",
+                ActorType   = (Int32)TimelineActorType.Human,
+                ActorId     = user.Id,
+                CreatedAt   = DateTime.UtcNow
+            });
+        }
+
+        return ticket;
     }
 
     [HttpDelete(nameof(DeleteTicket))]

csharp/App/Backend/DataTypes/TicketTimelineEvent.cs

@@ -6,7 +6,7 @@ public enum TimelineEventType
 {
     Created = 0, StatusChanged = 1, Assigned = 2,
     CommentAdded = 3, AiDiagnosisAttached = 4, Escalated = 5,
-    ResolutionAdded = 6
+    ResolutionAdded = 6, SubjectChanged = 7
 }
 
 public enum TimelineActorType { System = 0, AiAgent = 1, Human = 2 }

typescript/frontend-marios2/src/content/dashboards/Tickets/TicketDetail.tsx

@@ -1,4 +1,5 @@
-import React, { useCallback, useEffect, useRef, useState } from 'react';
+import React, { useCallback, useContext, useEffect, useRef, useState } from 'react';
+import { UserContext } from 'src/contexts/userContext';
 import { useNavigate, useParams } from 'react-router-dom';
 import {
   Alert,
@@ -87,6 +88,12 @@ function TicketDetailPage() {
   const [editingDescription, setEditingDescription] = useState(false);
   const [savingDescription, setSavingDescription] = useState(false);
   const [descriptionSaved, setDescriptionSaved] = useState(false);
+  const [subject, setSubject] = useState('');
+  const [editingSubject, setEditingSubject] = useState(false);
+  const [savingSubject, setSavingSubject] = useState(false);
+  const [subjectError, setSubjectError] = useState('');
+  const userCtx = useContext(UserContext);
+  const currentUser = userCtx?.currentUser;
   const [docRefreshKey, setDocRefreshKey] = useState(0);
   const [solveGateOpen, setSolveGateOpen] = useState(false);
   const rootCauseRef = useRef<HTMLInputElement | null>(null);
@@ -107,6 +114,7 @@ function TicketDetailPage() {
         setRootCause(res.data.ticket.rootCause ?? '');
         setSolution(res.data.ticket.solution ?? '');
         setDescription(res.data.ticket.description ?? '');
+        setSubject(res.data.ticket.subject ?? '');
         setEditCustomSub(res.data.ticket.customSubCategory ?? '');
         setEditCustomCat(res.data.ticket.customCategory ?? '');
         setError('');
@@ -205,6 +213,25 @@ function TicketDetailPage() {
       });
   };
 
+  const handleSaveSubject = () => {
+    if (!detail) return;
+    const trimmed = subject.trim();
+    if (!trimmed) {
+      setSubjectError(intl.formatMessage({ id: 'subjectRequired', defaultMessage: 'Subject is required.' }));
+      return;
+    }
+    setSavingSubject(true);
+    setSubjectError('');
+    axiosConfig
+      .put('/UpdateTicket', { ...detail.ticket, subject: trimmed })
+      .then(() => {
+        fetchDetail();
+        setEditingSubject(false);
+      })
+      .catch(() => setSubjectError(intl.formatMessage({ id: 'failedToSaveSubject', defaultMessage: 'Failed to save subject.' })))
+      .finally(() => setSavingSubject(false));
+  };
+
   const handleSaveDescription = () => {
     if (!detail) return;
     setSavingDescription(true);
@@ -285,10 +312,66 @@ function TicketDetailPage() {
         </Box>
 
         <Box mb={3}>
-          <Typography variant="h3" gutterBottom>
+          {editingSubject ? (
+            <Box sx={{ display: 'flex', flexDirection: 'column', gap: 1, mb: 1 }}>
+              <Box display="flex" gap={1} alignItems="flex-start">
+                <Typography variant="h3" sx={{ whiteSpace: 'nowrap', pt: 0.5 }}>
+                  #{ticket.id} —
+                </Typography>
+                <TextField
+                  fullWidth
+                  autoFocus
+                  value={subject}
+                  onChange={(e) => {
+                    setSubject(e.target.value);
+                    setSubjectError('');
+                  }}
+                  error={!!subjectError}
+                  helperText={subjectError}
+                />
+              </Box>
+              <Box display="flex" justifyContent="flex-end" gap={1}>
+                <Button
+                  size="small"
+                  onClick={() => {
+                    setEditingSubject(false);
+                    setSubject(ticket.subject);
+                    setSubjectError('');
+                  }}
+                >
+                  <FormattedMessage id="cancel" defaultMessage="Cancel" />
+                </Button>
+                <Button
+                  variant="contained"
+                  size="small"
+                  onClick={handleSaveSubject}
+                  disabled={savingSubject}
+                >
+                  <FormattedMessage id="save" defaultMessage="Save" />
+                </Button>
+              </Box>
+            </Box>
+          ) : (
+            <Box display="flex" alignItems="center" gap={1} flexWrap="wrap">
+              <Typography variant="h3" gutterBottom sx={{ mb: 0 }}>
                 #{ticket.id} — {ticket.subject}
               </Typography>
-          <Box display="flex" gap={1} alignItems="center">
+              {currentUser?.id === ticket.createdByUserId && (
+                <Button
+                  size="small"
+                  startIcon={<EditIcon />}
+                  onClick={() => {
+                    setSubject(ticket.subject);
+                    setSubjectError('');
+                    setEditingSubject(true);
+                  }}
+                >
+                  <FormattedMessage id="edit" defaultMessage="Edit" />
+                </Button>
+              )}
+            </Box>
+          )}
+          <Box display="flex" gap={1} alignItems="center" mt={1}>
             <StatusChip status={ticket.status} size="medium" />
             <Typography variant="body2" color="text.secondary">
               {intl.formatMessage(priorityKeys[ticket.priority] ?? { id: 'unknown', defaultMessage: '-' })} ·{' '}

typescript/frontend-marios2/src/content/dashboards/Tickets/TimelinePanel.tsx

@@ -20,7 +20,8 @@ const eventTypeKeys: Record<number, { id: string; defaultMessage: string }> = {
   [TimelineEventType.CommentAdded]:         { id: 'timelineCommentAdded',    defaultMessage: 'Comment Added' },
   [TimelineEventType.AiDiagnosisAttached]:  { id: 'timelineAiDiagnosis',     defaultMessage: 'AI Diagnosis' },
   [TimelineEventType.Escalated]:            { id: 'timelineEscalated',       defaultMessage: 'Escalated' },
-  [TimelineEventType.ResolutionAdded]:      { id: 'timelineResolutionAdded', defaultMessage: 'Resolution Added' }
+  [TimelineEventType.ResolutionAdded]:      { id: 'timelineResolutionAdded', defaultMessage: 'Resolution Added' },
+  [TimelineEventType.SubjectChanged]:       { id: 'timelineSubjectChanged',  defaultMessage: 'Subject Changed' }
 };
 
 const eventTypeColors: Record<number, string> = {
@@ -30,7 +31,8 @@ const eventTypeColors: Record<number, string> = {
   [TimelineEventType.CommentAdded]: '#2e7d32',
   [TimelineEventType.AiDiagnosisAttached]: '#0288d1',
   [TimelineEventType.Escalated]: '#d32f2f',
-  [TimelineEventType.ResolutionAdded]: '#4caf50'
+  [TimelineEventType.ResolutionAdded]: '#4caf50',
+  [TimelineEventType.SubjectChanged]: '#7b1fa2'
 };
 
 interface TimelinePanelProps {

typescript/frontend-marios2/src/interfaces/TicketTypes.tsx

@@ -181,7 +181,8 @@ export enum TimelineEventType {
   CommentAdded = 3,
   AiDiagnosisAttached = 4,
   Escalated = 5,
-  ResolutionAdded = 6
+  ResolutionAdded = 6,
+  SubjectChanged = 7
 }
 
 export type Ticket = {

typescript/frontend-marios2/src/lang/de.json

@@ -623,6 +623,8 @@
   "subCategory": "Unterkategorie",
   "edit": "Bearbeiten",
   "save": "Speichern",
+  "subjectRequired": "Betreff ist erforderlich.",
+  "failedToSaveSubject": "Betreff konnte nicht gespeichert werden.",
   "descriptionSaved": "Beschreibung gespeichert.",
   "subCatGeneral": "Allgemein",
   "subCatOther": "Sonstiges",
@@ -653,6 +655,7 @@
   "timelineAiDiagnosis": "KI-Diagnose",
   "timelineEscalated": "Eskaliert",
   "timelineResolutionAdded": "Lösung hinzugefügt",
+  "timelineSubjectChanged": "Betreff geändert",
   "timelineCreatedDesc": "Ticket erstellt von {name}.",
   "timelineStatusChangedDesc": "Status geändert auf {status}.",
   "timelineAssignedDesc": "Zugewiesen an {name}.",

typescript/frontend-marios2/src/lang/en.json

@@ -371,6 +371,8 @@
   "subCategory": "Sub-Category",
   "edit": "Edit",
   "save": "Save",
+  "subjectRequired": "Subject is required.",
+  "failedToSaveSubject": "Failed to save subject.",
   "descriptionSaved": "Description saved.",
   "subCatGeneral": "General",
   "subCatOther": "Other",
@@ -401,6 +403,7 @@
   "timelineAiDiagnosis": "AI Diagnosis",
   "timelineEscalated": "Escalated",
   "timelineResolutionAdded": "Resolution Added",
+  "timelineSubjectChanged": "Subject Changed",
   "timelineCreatedDesc": "Ticket created by {name}.",
   "timelineStatusChangedDesc": "Status changed to {status}.",
   "timelineAssignedDesc": "Assigned to {name}.",

typescript/frontend-marios2/src/lang/fr.json

@@ -623,6 +623,8 @@
   "subCategory": "Sous-catégorie",
   "edit": "Modifier",
   "save": "Enregistrer",
+  "subjectRequired": "Le sujet est requis.",
+  "failedToSaveSubject": "Échec de l'enregistrement du sujet.",
   "descriptionSaved": "Description enregistrée.",
   "subCatGeneral": "Général",
   "subCatOther": "Autre",
@@ -653,6 +655,7 @@
   "timelineAiDiagnosis": "Diagnostic IA",
   "timelineEscalated": "Escaladé",
   "timelineResolutionAdded": "Résolution ajoutée",
+  "timelineSubjectChanged": "Sujet modifié",
   "timelineCreatedDesc": "Ticket créé par {name}.",
   "timelineStatusChangedDesc": "Statut modifié en {status}.",
   "timelineAssignedDesc": "Assigné à {name}.",

typescript/frontend-marios2/src/lang/it.json

@@ -623,6 +623,8 @@
   "subCategory": "Sottocategoria",
   "edit": "Modifica",
   "save": "Salva",
+  "subjectRequired": "L'oggetto è obbligatorio.",
+  "failedToSaveSubject": "Impossibile salvare l'oggetto.",
   "descriptionSaved": "Descrizione salvata.",
   "subCatGeneral": "Generale",
   "subCatOther": "Altro",
@@ -653,6 +655,7 @@
   "timelineAiDiagnosis": "Diagnosi IA",
   "timelineEscalated": "Escalato",
   "timelineResolutionAdded": "Risoluzione aggiunta",
+  "timelineSubjectChanged": "Oggetto modificato",
   "timelineCreatedDesc": "Ticket creato da {name}.",
   "timelineStatusChangedDesc": "Stato modificato in {status}.",
   "timelineAssignedDesc": "Assegnato a {name}.",