Fix tag addition error handling and add legacy support for case tags

- Improved error handling when adding tags by parsing JSON response safely.
- Added support for legacy tag addition via the /sag/{id}/tags endpoint for case context.
- Enhanced user feedback for tag addition errors and success notifications.

app/modules/sag/backend/router.py

@@ -7,7 +7,7 @@ import hashlib
 import base64
 import html
 from pathlib import Path
-from datetime import datetime, timedelta
+from datetime import datetime, timedelta, timezone
 from typing import List, Optional, Dict
 from uuid import uuid4
 
@@ -876,6 +876,14 @@ async def mark_sag_recent_open(sag_id: int, request: Request):
         if not case_row:
             raise HTTPException(status_code=404, detail="Case not found")
 
+        if not _table_exists("sag_recent_cases"):
+            logger.warning("⚠️ sag_recent_cases table missing; skipping recent-open persistence")
+            return {
+                "sag_id": sag_id,
+                "titel": case_row.get("titel"),
+                "opened_at": None,
+            }
+
         upserted = execute_query(
             """
             INSERT INTO sag_recent_cases (user_id, sag_id, opened_at)
@@ -921,6 +929,10 @@ async def list_recent_sager(request: Request, limit: int = Query(10, ge=1, le=10
     user_id = _get_user_id_from_request(request)
 
     try:
+        if not _table_exists("sag_recent_cases"):
+            logger.warning("⚠️ sag_recent_cases table missing; returning empty recent cases")
+            return []
+
         rows = execute_query(
             """
             SELECT
@@ -1163,13 +1175,18 @@ async def update_sag(sag_id: int, updates: dict):
     try:
         # Check if case exists
         check = execute_query(
-            "SELECT id, status FROM sag_sager WHERE id = %s AND deleted_at IS NULL",
+            """
+            SELECT id, status, template_key, priority, ansvarlig_bruger_id, assigned_group_id
+            FROM sag_sager
+            WHERE id = %s AND deleted_at IS NULL
+            """,
             (sag_id,),
         )
         if not check:
             raise HTTPException(status_code=404, detail="Case not found")
 
-        previous_status = str((check[0] or {}).get("status") or "").strip().lower()
+        previous_row = check[0] or {}
+        previous_status = str(previous_row.get("status") or "").strip().lower()
         
         # Backwards compatibility: frontend sends "type", DB stores "template_key"
         if "type" in updates and "template_key" not in updates:
@@ -1249,12 +1266,102 @@ async def update_sag(sag_id: int, updates: dict):
         
         result = execute_query(query, tuple(params))
         if result:
+            updated_row = result[0] or {}
             if "status" in updates:
-                new_status = str((result[0] or {}).get("status") or "").strip().lower()
+                new_status = str(updated_row.get("status") or "").strip().lower()
                 if new_status and new_status != previous_status:
                     _activate_waiting_cases_by_status(sag_id, previous_status, new_status)
+
+            try:
+                def _norm(value: Optional[object]) -> str:
+                    return str(value or "").strip()
+
+                def _resolve_user_name(user_id: Optional[object]) -> str:
+                    if user_id in (None, ""):
+                        return "Ingen"
+                    row = execute_query_single(
+                        """
+                        SELECT COALESCE(NULLIF(TRIM(full_name), ''), NULLIF(TRIM(username), ''), CONCAT('Bruger #', user_id::text)) AS name
+                        FROM users
+                        WHERE user_id = %s
+                        """,
+                        (int(user_id),),
+                    )
+                    return str((row or {}).get("name") or f"Bruger #{int(user_id)}")
+
+                def _resolve_group_name(group_id: Optional[object]) -> str:
+                    if group_id in (None, ""):
+                        return "Ingen"
+                    row = execute_query_single(
+                        "SELECT COALESCE(NULLIF(TRIM(name), ''), CONCAT('Gruppe #', id::text)) AS name FROM groups WHERE id = %s",
+                        (int(group_id),),
+                    )
+                    return str((row or {}).get("name") or f"Gruppe #{int(group_id)}")
+
+                type_labels = {
+                    "ticket": "Ticket",
+                    "pipeline": "Pipeline",
+                    "opgave": "Opgave",
+                    "ordre": "Ordre",
+                    "projekt": "Projekt",
+                    "service": "Service",
+                }
+
+                change_messages: List[str] = []
+
+                if "status" in updates:
+                    old_value = _norm(previous_row.get("status")) or "-"
+                    new_value = _norm(updated_row.get("status")) or "-"
+                    if old_value.lower() != new_value.lower():
+                        change_messages.append(f"🔄 Status ændret: {old_value} → {new_value}")
+
+                if "template_key" in updates or "type" in updates:
+                    old_type_key = _norm(previous_row.get("template_key")).lower() or "ticket"
+                    new_type_key = _norm(updated_row.get("template_key")).lower() or "ticket"
+                    if old_type_key != new_type_key:
+                        old_type = type_labels.get(old_type_key, old_type_key.capitalize())
+                        new_type = type_labels.get(new_type_key, new_type_key.capitalize())
+                        change_messages.append(f"🧩 Type ændret: {old_type} → {new_type}")
+
+                if "priority" in updates:
+                    old_priority = _norm(previous_row.get("priority") or "normal").lower()
+                    new_priority = _norm(updated_row.get("priority") or "normal").lower()
+                    if old_priority != new_priority:
+                        priority_labels = {
+                            "low": "Lav",
+                            "normal": "Normal",
+                            "high": "Høj",
+                            "urgent": "Akut",
+                        }
+                        old_label = priority_labels.get(old_priority, old_priority.capitalize() or "-")
+                        new_label = priority_labels.get(new_priority, new_priority.capitalize() or "-")
+                        change_messages.append(f"⚠️ Prioritet ændret: {old_label} → {new_label}")
+
+                if "ansvarlig_bruger_id" in updates:
+                    old_user = _resolve_user_name(previous_row.get("ansvarlig_bruger_id"))
+                    new_user = _resolve_user_name(updated_row.get("ansvarlig_bruger_id"))
+                    if old_user != new_user:
+                        change_messages.append(f"👤 Ansvarlig ændret: {old_user} → {new_user}")
+
+                if "assigned_group_id" in updates:
+                    old_group = _resolve_group_name(previous_row.get("assigned_group_id"))
+                    new_group = _resolve_group_name(updated_row.get("assigned_group_id"))
+                    if old_group != new_group:
+                        change_messages.append(f"👥 Gruppe ændret: {old_group} → {new_group}")
+
+                for message in change_messages:
+                    execute_query(
+                        """
+                        INSERT INTO sag_kommentarer (sag_id, forfatter, indhold, er_system_besked)
+                        VALUES (%s, %s, %s, %s)
+                        """,
+                        (sag_id, "System", message, True),
+                    )
+            except Exception as comment_log_error:
+                logger.warning("⚠️ Could not log field-change comments for case %s: %s", sag_id, comment_log_error)
+
             logger.info("✅ Case updated: %s", sag_id)
-            return result[0]
+            return updated_row
         raise HTTPException(status_code=500, detail="Failed to update case")
     except HTTPException:
         raise
@@ -2717,6 +2824,275 @@ async def get_kommentarer(sag_id: int):
         logger.error("❌ Error getting comments: %s", e)
         raise HTTPException(status_code=500, detail="Failed to get comments")
 
+
+@router.get("/sag/{sag_id}/timeline")
+async def get_sag_timeline(sag_id: int, include_subcases: bool = Query(False)):
+    """Return a unified timeline for the case with optional child cases."""
+    try:
+        check = execute_query("SELECT id FROM sag_sager WHERE id = %s AND deleted_at IS NULL", (sag_id,))
+        if not check:
+            raise HTTPException(status_code=404, detail="Case not found")
+
+        if include_subcases:
+            case_tree_query = """
+                WITH RECURSIVE normalized_relations AS (
+                    SELECT
+                        CASE
+                            WHEN LOWER(relationstype) IN ('afledt af', 'afledt_af') THEN målsag_id
+                            WHEN LOWER(relationstype) IN ('årsag til', 'årsag_til') THEN kilde_sag_id
+                            ELSE kilde_sag_id
+                        END AS parent_id,
+                        CASE
+                            WHEN LOWER(relationstype) IN ('afledt af', 'afledt_af') THEN kilde_sag_id
+                            WHEN LOWER(relationstype) IN ('årsag til', 'årsag_til') THEN målsag_id
+                            ELSE målsag_id
+                        END AS child_id
+                    FROM sag_relationer
+                    WHERE deleted_at IS NULL
+                ),
+                case_tree AS (
+                    SELECT id FROM sag_sager WHERE id = %s AND deleted_at IS NULL
+                    UNION
+                    SELECT nr.child_id
+                    FROM normalized_relations nr
+                    JOIN case_tree ct ON nr.parent_id = ct.id
+                )
+                SELECT s.id, s.titel
+                FROM sag_sager s
+                JOIN case_tree ct ON s.id = ct.id
+                WHERE s.deleted_at IS NULL
+                ORDER BY s.id
+            """
+            case_rows = execute_query(case_tree_query, (sag_id,)) or []
+        else:
+            case_rows = execute_query(
+                "SELECT id, titel FROM sag_sager WHERE id = %s AND deleted_at IS NULL",
+                (sag_id,)
+            ) or []
+
+        case_ids = [row.get("id") for row in case_rows if row.get("id") is not None]
+        if not case_ids:
+            return {"case_tree": [], "events": [], "total": 0}
+
+        placeholders = ",".join(["%s"] * len(case_ids))
+
+        comments_query = f"""
+            SELECT c.*, s.titel AS source_sag_titel
+            FROM sag_kommentarer c
+            LEFT JOIN sag_sager s ON s.id = c.sag_id
+            WHERE c.deleted_at IS NULL
+              AND c.sag_id IN ({placeholders})
+            ORDER BY c.created_at DESC
+            LIMIT 800
+        """
+        comments = execute_query(comments_query, tuple(case_ids)) or []
+
+        beskrivelse_history = []
+        if _table_exists("sag_beskrivelse_history"):
+            history_query = f"""
+                SELECT h.id, h.sag_id, h.beskrivelse_before, h.beskrivelse_after,
+                       h.changed_by_name, h.changed_at, s.titel AS source_sag_titel
+                FROM sag_beskrivelse_history h
+                LEFT JOIN sag_sager s ON s.id = h.sag_id
+                WHERE h.sag_id IN ({placeholders})
+                ORDER BY h.changed_at DESC
+                LIMIT 400
+            """
+            beskrivelse_history = execute_query(history_query, tuple(case_ids)) or []
+
+        def _detect_source(text: Optional[str]) -> str:
+            value = str(text or "").lower()
+            if re.search(r"\bemail\b|\be-mail\b|✉️|📧|email-kladde|mail\b|indgaaende email|udgaaende email|indgående email|udgående email", value):
+                return "email"
+            if re.search(r"\bsms\b|💬", value):
+                return "sms"
+            if re.search(r"\bopkald\b|\bring\b|\bringet\b|📞|click-to-call|yealink", value):
+                return "call"
+            return "module"
+
+        def _detect_field_change_subtype(text: Optional[str]) -> Optional[str]:
+            value = str(text or "").lower()
+
+            if re.search(r"\bstatus\b.*\b(ændret|ændring|skiftet|opdateret|sat til)\b|\bændret status\b|\bstatus:\s*.*->|\bstatus\s*->", value):
+                return "status"
+
+            if re.search(r"\b(type|sagstype|template_key|template key)\b.*\b(ændret|ændring|skiftet|opdateret|sat til)\b|\bændret type\b|\btype:\s*.*->|\btemplate_key\b", value):
+                return "type"
+
+            if re.search(r"\b(prioritet|priority)\b.*\b(ændret|ændring|skiftet|opdateret|sat til)\b|\bændret prioritet\b|\bprioritet:\s*.*->", value):
+                return "priority"
+
+            if re.search(r"\b(ansvarlig|assignee|owner|ansvarlig_bruger_id|ansvarlig bruger)\b.*\b(ændret|ændring|skiftet|opdateret|sat til|tildelt)\b|\bændret ansvarlig\b|\bansvarlig:\s*.*->|\bassign(ed)? to\b", value):
+                return "assignee"
+
+            if re.search(r"\b(gruppe|team|assigned_group_id|assigned group|gruppe-id)\b.*\b(ændret|ændring|skiftet|opdateret|sat til|tildelt)\b|\bændret gruppe\b|\bgruppe:\s*.*->", value):
+                return "group"
+
+            return None
+
+        events = []
+
+        for row in comments:
+            created_at = row.get("created_at")
+            if not created_at:
+                continue
+
+            if isinstance(created_at, datetime):
+                ts = created_at.isoformat()
+            else:
+                ts = str(created_at)
+
+            is_system = bool(row.get("er_system_besked"))
+            is_internal = bool(row.get("er_intern"))
+            subtype = "system" if is_system else ("internal" if is_internal else "external")
+            content = str(row.get("indhold") or "")
+            author = str(row.get("forfatter") or "Bruger")
+            field_change_subtype = _detect_field_change_subtype(content)
+
+            comment_id = row.get("id") or row.get("kommentar_id") or len(events) + 1
+
+            events.append({
+                "id": f"comment:{comment_id}",
+                "event_type": "field_change" if field_change_subtype else "comment",
+                "event_subtype": field_change_subtype or subtype,
+                "source": "case" if field_change_subtype else _detect_source(content),
+                "timestamp": ts,
+                "sag_id": row.get("sag_id"),
+                "sag_titel": row.get("source_sag_titel"),
+                "forfatter": author,
+                "title": f"Feltændring · {author}" if field_change_subtype else f"Kommentar · {author}",
+                "description": content,
+            })
+
+        for row in beskrivelse_history:
+            changed_at = row.get("changed_at")
+            if not changed_at:
+                continue
+
+            if isinstance(changed_at, datetime):
+                ts = changed_at.isoformat()
+            else:
+                ts = str(changed_at)
+
+            changed_by = str(row.get("changed_by_name") or "Ukendt")
+            before = str(row.get("beskrivelse_before") or "")
+            after = str(row.get("beskrivelse_after") or "")
+            before_short = (before[:240] + "...") if len(before) > 240 else before
+            after_short = (after[:240] + "...") if len(after) > 240 else after
+            description = f"Før: {before_short or 'tom'}\nEfter: {after_short or 'tom'}"
+
+            events.append({
+                "id": f"description:{row.get('id') or len(events) + 1}",
+                "event_type": "description",
+                "event_subtype": "edit",
+                "source": "module",
+                "timestamp": ts,
+                "sag_id": row.get("sag_id"),
+                "sag_titel": row.get("source_sag_titel"),
+                "forfatter": changed_by,
+                "title": f"Beskrivelse opdateret · {changed_by}",
+                "description": description,
+            })
+
+        if _table_exists("sag_reminders"):
+            reminders_query = f"""
+                SELECT r.id, r.sag_id, r.title, r.message, r.event_type,
+                       r.next_check_at, r.scheduled_at,
+                       s.titel AS source_sag_titel
+                FROM sag_reminders r
+                LEFT JOIN sag_sager s ON s.id = r.sag_id
+                WHERE r.deleted_at IS NULL
+                  AND r.sag_id IN ({placeholders})
+                ORDER BY COALESCE(r.next_check_at, r.scheduled_at) DESC
+                LIMIT 400
+            """
+            reminders = execute_query(reminders_query, tuple(case_ids)) or []
+
+            for row in reminders:
+                start_value = row.get("next_check_at") or row.get("scheduled_at")
+                if not start_value:
+                    continue
+
+                ts = start_value.isoformat() if isinstance(start_value, datetime) else str(start_value)
+                title = str(row.get("title") or "Påmindelse")
+                message = str(row.get("message") or "")
+                event_kind = str(row.get("event_type") or "reminder")
+
+                events.append({
+                    "id": f"reminder:{row.get('id') or len(events) + 1}",
+                    "event_type": "reminder",
+                    "event_subtype": event_kind,
+                    "source": "reminder",
+                    "timestamp": ts,
+                    "sag_id": row.get("sag_id"),
+                    "sag_titel": row.get("source_sag_titel"),
+                    "forfatter": "Reminder",
+                    "title": f"Påmindelse · {title}",
+                    "description": message,
+                })
+
+        if _table_exists("tmodule_times"):
+            time_query = f"""
+                SELECT t.id, t.sag_id, t.description, t.entry_type,
+                       t.worked_date, t.created_at, t.approved_hours, t.original_hours,
+                       s.titel AS source_sag_titel
+                FROM tmodule_times t
+                LEFT JOIN sag_sager s ON s.id = t.sag_id
+                WHERE t.sag_id IN ({placeholders})
+                ORDER BY COALESCE(t.worked_date::timestamp, t.created_at) DESC, t.id DESC
+                LIMIT 600
+            """
+            time_entries = execute_query(time_query, tuple(case_ids)) or []
+
+            for row in time_entries:
+                raw_ts = row.get("worked_date") or row.get("created_at")
+                if not raw_ts:
+                    continue
+
+                ts = raw_ts.isoformat() if isinstance(raw_ts, datetime) else str(raw_ts)
+                hours = row.get("approved_hours")
+                if hours is None:
+                    hours = row.get("original_hours")
+                hours_text = f"{float(hours):.2f} t" if hours is not None else "ukendt tid"
+                description = str(row.get("description") or "")
+                entry_type = str(row.get("entry_type") or "arbejde")
+
+                events.append({
+                    "id": f"time:{row.get('id') or len(events) + 1}",
+                    "event_type": "time",
+                    "event_subtype": entry_type,
+                    "source": "time",
+                    "timestamp": ts,
+                    "sag_id": row.get("sag_id"),
+                    "sag_titel": row.get("source_sag_titel"),
+                    "forfatter": "Tid",
+                    "title": f"Tidsregistrering · {hours_text}",
+                    "description": description,
+                })
+
+        def _sort_key(item: Dict) -> datetime:
+            raw = str(item.get("timestamp") or "")
+            try:
+                parsed = datetime.fromisoformat(raw.replace("Z", "+00:00").replace(" ", "T"))
+                if parsed.tzinfo is not None:
+                    parsed = parsed.astimezone(timezone.utc).replace(tzinfo=None)
+                return parsed
+            except Exception:
+                return datetime.min
+
+        events.sort(key=_sort_key, reverse=True)
+
+        return {
+            "case_tree": case_rows,
+            "events": events,
+            "total": len(events),
+        }
+    except HTTPException:
+        raise
+    except Exception as e:
+        logger.error("❌ Error loading case timeline: %s", e)
+        raise HTTPException(status_code=500, detail="Failed to load case timeline")
+
 @router.post("/sag/{sag_id}/kommentarer")
 async def add_kommentar(sag_id: int, data: dict, request: Request):
     """Add a comment to a case."""

app/modules/sag/frontend/views.py

@@ -779,6 +779,332 @@ async def sag_detaljer(request: Request, sag_id: int):
         raise HTTPException(status_code=500, detail="Failed to load case details")
 
 
+@router.get("/sag/{sag_id}/v3", response_class=HTMLResponse)
+async def sag_detaljer_v3(request: Request, sag_id: int):
+    """Display case details."""
+    try:
+        # Fetch main case
+        sag_query = """
+            SELECT s.*,
+                   COALESCE(u.full_name, u.username) AS ansvarlig_navn,
+                   g.name AS assigned_group_name
+            FROM sag_sager s
+            LEFT JOIN users u ON u.user_id = s.ansvarlig_bruger_id
+            LEFT JOIN groups g ON g.id = s.assigned_group_id
+            WHERE s.id = %s AND s.deleted_at IS NULL
+        """
+        sag_result = execute_query(sag_query, (sag_id,))
+        
+        if not sag_result:
+            raise HTTPException(status_code=404, detail="Case not found")
+        
+        sag = sag_result[0]
+        
+        # Fetch tags (Support both Legacy sag_tags and New entity_tags)
+        # First try the new system (entity_tags) which the valid frontend uses
+        tags_query = """
+            SELECT t.name as tag_navn 
+            FROM tags t
+            JOIN entity_tags et ON t.id = et.tag_id
+            WHERE et.entity_type = 'case' AND et.entity_id = %s
+        """
+        tags = execute_query(tags_query, (sag_id,))
+
+        # If empty, try legacy table fallback
+        if not tags:
+            tags_query_legacy = "SELECT * FROM sag_tags WHERE sag_id = %s AND deleted_at IS NULL ORDER BY created_at DESC"
+            tags = execute_query(tags_query_legacy, (sag_id,))
+        
+        # Fetch relations
+        relationer_query = """
+            SELECT sr.*, 
+                   ss_kilde.titel as kilde_titel,
+                   ss_mål.titel as mål_titel
+            FROM sag_relationer sr
+            JOIN sag_sager ss_kilde ON sr.kilde_sag_id = ss_kilde.id
+            JOIN sag_sager ss_mål ON sr.målsag_id = ss_mål.id
+            WHERE (sr.kilde_sag_id = %s OR sr.målsag_id = %s)
+            AND sr.deleted_at IS NULL
+            ORDER BY sr.created_at DESC
+        """
+        relationer = execute_query(relationer_query, (sag_id, sag_id))
+        
+        # --- Relation Tree Construction ---
+        relation_tree = []
+        try:
+            from app.modules.sag.services.relation_service import RelationService
+            relation_tree = RelationService.get_relation_tree(sag_id)
+        except Exception as e:
+            logger.error(f"Error building relation tree: {e}")
+            relation_tree = []
+
+        # Fallback: if tree builder fails/returns empty but relations exist, render a minimal flat tree.
+        if not relation_tree and relationer:
+            try:
+                root_node = {
+                    "case": {
+                        "id": sag.get("id"),
+                        "titel": sag.get("titel"),
+                        "status": sag.get("status"),
+                        "type": sag.get("type"),
+                        "template_key": sag.get("template_key"),
+                    },
+                    "relation_type": None,
+                    "relation_id": None,
+                    "is_current": True,
+                    "children": [],
+                }
+
+                seen_related = set()
+                for rel in relationer or []:
+                    source_id = rel.get("kilde_sag_id")
+                    target_id = rel.get("målsag_id")
+                    related_id = target_id if source_id == sag_id else source_id
+                    if not related_id or related_id in seen_related:
+                        continue
+                    seen_related.add(related_id)
+
+                    root_node["children"].append({
+                        "case": {
+                            "id": related_id,
+                            "titel": rel.get("mål_titel") if source_id == sag_id else rel.get("kilde_titel"),
+                            "status": None,
+                            "type": None,
+                            "template_key": None,
+                        },
+                        "relation_type": rel.get("relationstype") or "Relateret til",
+                        "relation_id": rel.get("id"),
+                        "is_current": False,
+                        "children": [],
+                    })
+
+                relation_tree = [root_node]
+            except Exception as fallback_err:
+                logger.warning("⚠️ Could not build fallback relation tree: %s", fallback_err)
+        
+        # Fetch customer info if customer_id exists
+        customer = None
+        hovedkontakt = None
+        if sag.get('customer_id'):
+            customer_query = "SELECT * FROM customers WHERE id = %s"
+            customer_result = execute_query(customer_query, (sag['customer_id'],))
+            if customer_result:
+                customer = customer_result[0]
+
+        # Fetch hovedkontakt (primary contact) for case via sag_kontakter
+        kontakt_query = """
+            SELECT c.*
+            FROM contacts c
+            JOIN sag_kontakter sk ON c.id = sk.contact_id
+            WHERE sk.sag_id = %s AND sk.deleted_at IS NULL AND sk.is_primary = TRUE
+            LIMIT 1
+        """
+        kontakt_result = execute_query(kontakt_query, (sag_id,))
+        if kontakt_result:
+            hovedkontakt = kontakt_result[0]
+        else:
+            fallback_query = """
+                SELECT c.*
+                FROM contacts c
+                JOIN sag_kontakter sk ON c.id = sk.contact_id
+                WHERE sk.sag_id = %s AND sk.deleted_at IS NULL
+                ORDER BY sk.created_at ASC
+                LIMIT 1
+            """
+            fallback_result = execute_query(fallback_query, (sag_id,))
+            if fallback_result:
+                hovedkontakt = fallback_result[0]
+
+        # Fetch prepaid cards for customer
+        # Cast remaining_hours to float to avoid Jinja formatting issues with Decimal
+        # DEBUG: Logging customer ID
+        prepaid_cards = []
+        if sag.get('customer_id'):
+            cid = sag.get('customer_id')
+            logger.info(f"🔎 Looking up prepaid cards for Sag {sag_id}, Customer ID: {cid} (Type: {type(cid)})")
+            
+            pc_query = """
+                SELECT id, card_number, CAST(remaining_hours AS FLOAT) as remaining_hours, expires_at
+                FROM tticket_prepaid_cards
+                WHERE customer_id = %s
+                  AND status = 'active'
+                  AND remaining_hours > 0
+                ORDER BY created_at DESC
+            """
+            prepaid_cards = execute_query(pc_query, (cid,))
+            logger.info(f"💳 Found {len(prepaid_cards)} prepaid cards for customer {cid}")
+
+        # Fetch fixed-price agreements for customer
+        fixed_price_agreements = []
+        if sag.get('customer_id'):
+            cid = sag.get('customer_id')
+            logger.info(f"🔎 Looking up fixed-price agreements for Sag {sag_id}, Customer ID: {cid}")
+            
+            fpa_query = """
+                SELECT 
+                    a.id, 
+                    a.agreement_number, 
+                    a.monthly_hours,
+                    COALESCE(bp.remaining_hours, a.monthly_hours) as remaining_hours_this_month
+                FROM customer_fixed_price_agreements a
+                LEFT JOIN fixed_price_billing_periods bp ON (
+                    a.id = bp.agreement_id 
+                    AND bp.period_start <= CURRENT_DATE 
+                    AND bp.period_end >= CURRENT_DATE
+                )
+                WHERE a.customer_id = %s
+                  AND a.status = 'active'
+                  AND (a.end_date IS NULL OR a.end_date >= CURRENT_DATE)
+                ORDER BY a.created_at DESC
+            """
+            fixed_price_agreements = execute_query(fpa_query, (cid,))
+            logger.info(f"📋 Found {len(fixed_price_agreements)} fixed-price agreements for customer {cid}")
+
+        # Fetch Nextcloud Instance for this customer
+        nextcloud_instance = None
+        if customer:
+            nc_query = "SELECT * FROM nextcloud_instances WHERE customer_id = %s AND deleted_at IS NULL"
+            nc_result = execute_query(nc_query, (customer['id'],))
+            if nc_result:
+                nextcloud_instance = nc_result[0]
+
+        # Fetch linked contacts
+        contacts_query = """
+            SELECT
+                sk.*,
+                c.first_name || ' ' || c.last_name as contact_name,
+                c.email as contact_email,
+                c.phone,
+                c.mobile,
+                c.title,
+                company.customer_name
+            FROM sag_kontakter sk
+            JOIN contacts c ON sk.contact_id = c.id
+            LEFT JOIN LATERAL (
+                SELECT cu.name AS customer_name
+                FROM contact_companies cc
+                JOIN customers cu ON cu.id = cc.customer_id
+                WHERE cc.contact_id = c.id
+                ORDER BY cc.is_primary DESC, cu.name
+                LIMIT 1
+            ) company ON TRUE
+            WHERE sk.sag_id = %s AND sk.deleted_at IS NULL
+        """
+        contacts = execute_query(contacts_query, (sag_id,))
+
+        # Fetch linked customers
+        customers_query = """
+            SELECT sk.*, c.name as customer_name, c.email as customer_email
+            FROM sag_kunder sk
+            JOIN customers c ON sk.customer_id = c.id
+            WHERE sk.sag_id = %s AND sk.deleted_at IS NULL
+        """
+        customers = execute_query(customers_query, (sag_id,))
+        
+        # Fetch comments
+        comments_query = "SELECT * FROM sag_kommentarer WHERE sag_id = %s AND deleted_at IS NULL ORDER BY created_at DESC"
+        comments = execute_query(comments_query, (sag_id,))
+
+        # Fetch Solution
+        solution_query = "SELECT * FROM sag_solutions WHERE sag_id = %s"
+        solution_res = execute_query(solution_query, (sag_id,))
+        solution = solution_res[0] if solution_res else None
+
+        # Fetch Time Entries
+        time_query = "SELECT * FROM tmodule_times WHERE sag_id = %s ORDER BY worked_date DESC"
+        time_entries = execute_query(time_query, (sag_id,))
+
+        # Fetch linked telephony call history
+        call_history_query = """
+            SELECT
+                t.id,
+                t.callid,
+                t.direction,
+                t.ekstern_nummer,
+                t.started_at,
+                t.ended_at,
+                t.duration_sec,
+                u.username,
+                u.full_name,
+                CONCAT(COALESCE(c.first_name, ''), ' ', COALESCE(c.last_name, '')) AS contact_name
+            FROM telefoni_opkald t
+            LEFT JOIN users u ON u.user_id = t.bruger_id
+            LEFT JOIN contacts c ON c.id = t.kontakt_id
+            WHERE t.sag_id = %s
+            ORDER BY t.started_at DESC
+            LIMIT 200
+        """
+        call_history = execute_query(call_history_query, (sag_id,))
+
+        # Check for nextcloud integration (case-insensitive, insensitive to whitespace)
+        logger.info(f"Checking tags for Nextcloud on case {sag_id}: {tags}")
+        is_nextcloud = any(t['tag_navn'] and t['tag_navn'].strip().lower() == 'nextcloud' for t in tags)
+        logger.info(f"is_nextcloud result: {is_nextcloud}")
+
+        related_case_options = []
+        try:
+            related_ids = set()
+            for rel in relationer or []:
+                related_ids.add(rel["kilde_sag_id"])
+                related_ids.add(rel["målsag_id"])
+            related_ids.discard(sag_id)
+            if related_ids:
+                placeholders = ",".join(["%s"] * len(related_ids))
+                related_query = f"SELECT id, titel, status FROM sag_sager WHERE id IN ({placeholders}) AND deleted_at IS NULL"
+                related_case_options = execute_query(related_query, tuple(related_ids))
+        except Exception as e:
+            logger.error("❌ Error building related case options: %s", e)
+            related_case_options = []
+
+        pipeline_stages = []
+        try:
+            pipeline_stages = execute_query(
+                "SELECT id, name, color, sort_order FROM pipeline_stages ORDER BY sort_order ASC, id ASC",
+                (),
+            )
+        except Exception as e:
+            logger.warning("⚠️ Could not load pipeline stages: %s", e)
+            pipeline_stages = []
+
+        status_options = _fetch_case_status_options()
+        current_status = str(sag.get("status") or "").strip()
+        if current_status and current_status.lower() not in {s.lower() for s in status_options}:
+            status_options.append(current_status)
+        is_deadline_overdue = _is_deadline_overdue(sag.get("deadline"))
+
+        return templates.TemplateResponse("modules/sag/templates/detail_v3.html", {
+            "request": request,
+            "case": sag,
+            "customer": customer,
+            "hovedkontakt": hovedkontakt,
+            "contacts": contacts,
+            "customers": customers,
+            "prepaid_cards": prepaid_cards,
+            "fixed_price_agreements": fixed_price_agreements,
+            "tags": tags,
+
+            "relationer": relationer,
+            "relation_tree": relation_tree,
+            "comments": comments,
+            "solution": solution,
+            "time_entries": time_entries,
+            "call_history": call_history,
+            "is_nextcloud": is_nextcloud,
+            "nextcloud_instance": nextcloud_instance,
+            "related_case_options": related_case_options,
+            "pipeline_stages": pipeline_stages,
+            "status_options": status_options,
+            "is_deadline_overdue": is_deadline_overdue,
+            "assignment_users": _fetch_assignment_users(),
+            "assignment_groups": _fetch_assignment_groups(),
+        })
+    except HTTPException:
+        raise
+    except Exception as e:
+        logger.error("❌ Error displaying case details: %s", e)
+        raise HTTPException(status_code=500, detail="Failed to load case details")
+
+
 @router.get("/sag/{sag_id}/edit", response_class=HTMLResponse)
 async def sag_rediger(request: Request, sag_id: int):
     """Display edit case form."""

app/modules/sag/templates/detail.html

@@ -864,11 +864,11 @@
 
     /* Forslag 1: Opgavebeskrivelse + kommentarspor (venstre side) */
     .narrative-description {
-        border: 1px solid rgba(15, 76, 117, 0.22);
+        border: 0;
-        background: linear-gradient(165deg, rgba(15, 76, 117, 0.11), rgba(15, 76, 117, 0.04));
+        background: transparent;
-        border-radius: 12px;
+        border-radius: 0;
-        padding: 1.1rem 1.1rem 1rem;
+        padding: 0.25rem 0.1rem 0;
-        box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.52), 0 3px 10px rgba(15, 76, 117, 0.06);
+        box-shadow: none;
     }
 
     #beskrivelse-section {
@@ -914,10 +914,10 @@
     }
 
     #beskrivelse-comments-wrap {
-        border: 1px solid rgba(15, 76, 117, 0.2);
+        border: 0;
-        border-radius: 12px;
+        border-radius: 0;
-        background: linear-gradient(180deg, color-mix(in srgb, var(--accent) 3%, var(--bg-card)), var(--bg-card));
+        background: transparent;
-        padding: 0.95rem;
+        padding: 0;
     }
 
     .narrative-lead {
@@ -1163,14 +1163,51 @@
         box-shadow: 0 0 0 2px rgba(255, 255, 255, 0.9);
     }
 
+    .case-details-shell {
+        background: transparent;
+        border: 0;
+        border-radius: 0;
+        box-shadow: none;
+    }
+
+    #case-left-column > .row.g-4,
+    #inner-center-col > .row.mb-3 {
+        --bs-gutter-x: 0;
+        --bs-gutter-y: 0;
+        margin-left: 0 !important;
+        margin-right: 0 !important;
+    }
+
+    #inner-left-col,
+    #inner-center-col,
+    #inner-center-col > .row.mb-3 > .col-12 {
+        padding-left: 0 !important;
+        padding-right: 0 !important;
+    }
+
+    #inner-center-col > .row.mb-3 > .col-12 {
+        margin-top: 0 !important;
+        margin-bottom: 0.75rem !important;
+    }
+
+    #inner-center-col .case-details-shell > .card-body {
+        padding: 0 !important;
+    }
+
+    #beskrivelse-section {
+        margin-top: 0 !important;
+        padding-top: 0 !important;
+        border-top: 0 !important;
+    }
+
     [data-bs-theme="dark"] .case-tab-count-badge {
         box-shadow: 0 0 0 2px rgba(20, 28, 36, 0.95);
     }
 
     [data-bs-theme="dark"] .narrative-description {
-        border-color: rgba(117, 194, 239, 0.32);
+        border-color: transparent;
-        background: linear-gradient(180deg, rgba(117, 194, 239, 0.2), rgba(117, 194, 239, 0.08));
+        background: transparent;
-        box-shadow: inset 0 1px 0 rgba(255,255,255,0.06), 0 4px 12px rgba(5, 18, 30, 0.28);
+        box-shadow: none;
     }
 
     [data-bs-theme="dark"] .case-left-section-title {
@@ -1182,8 +1219,7 @@
     }
 
     [data-bs-theme="dark"] .case-left-panel,
-    [data-bs-theme="dark"] #beskrivelse-history-wrap,
+    [data-bs-theme="dark"] #beskrivelse-history-wrap {
-    [data-bs-theme="dark"] #beskrivelse-comments-wrap {
         border-color: rgba(117, 194, 239, 0.28);
         background: linear-gradient(180deg, rgba(117, 194, 239, 0.08), rgba(17, 24, 33, 0.94));
     }
@@ -1236,13 +1272,17 @@
         border-bottom: 1px solid rgba(15, 76, 117, 0.08);
     }
 
-    #caseTabsContent > .tab-pane {
+    #caseTabsContent .tab-pane {
-        display: none;
+        display: none !important;
+        opacity: 1 !important;
+        transition: none !important;
     }
 
-    #caseTabsContent > .tab-pane.active,
+    #caseTabsContent .tab-pane.active,
-    #caseTabsContent > .tab-pane.show.active {
+    #caseTabsContent .tab-pane.show.active {
-        display: block;
+        display: block !important;
+        opacity: 1 !important;
+        visibility: visible !important;
     }
 
     .todo-step-item {
@@ -1605,6 +1645,10 @@
         gap: 0.75rem;
     }
 
+    #beskrivelse-section {
+        gap: 0.75rem;
+    }
+
     .module-priority-low {
         --module-accent: #64748b;
     }
@@ -1630,9 +1674,30 @@
         box-shadow: 0 4px 14px rgba(15, 76, 117, 0.08);
     }
 
-    .right-module-card .card-header {
+    .left-module-card {
+        border: 1px solid rgba(15, 76, 117, 0.14);
+        border-left: 4px solid var(--module-accent, var(--accent));
+        border-radius: 12px;
+        overflow: hidden;
+        background: linear-gradient(165deg, color-mix(in srgb, var(--module-accent, var(--accent)) 6%, var(--bg-card)) 0%, var(--bg-card) 100%);
+        box-shadow: 0 4px 14px rgba(15, 76, 117, 0.08);
+    }
+
+    .right-module-card .card-header,
+    .left-module-card .card-header {
         border-bottom: 1px solid color-mix(in srgb, var(--module-accent, var(--accent)) 22%, #d1d5db);
         background: color-mix(in srgb, var(--module-accent, var(--accent)) 7%, var(--bg-card));
+        padding: 0.35rem 0.6rem;
+        min-height: 0;
+    }
+
+    .right-module-card > .card-body,
+    .left-module-card > .card-body {
+        padding: 0.4rem !important;
+    }
+
+    #beskrivelse-section .left-module-card + .left-module-card {
+        margin-top: 0.75rem;
     }
 
     .module-title {
@@ -2032,11 +2097,26 @@
         box-shadow: 0 4px 12px rgba(15, 76, 117, 0.10);
     }
 
+    .left-module-card,
+    .right-module-card {
+        border: 2px solid rgba(15, 76, 117, 0.28) !important;
+        border-left: 2px solid rgba(15, 76, 117, 0.28) !important;
+        border-radius: 12px !important;
+        box-shadow: 0 4px 12px rgba(15, 76, 117, 0.10) !important;
+    }
+
     [data-bs-theme="dark"] .card[data-module] {
         border-color: rgba(117, 167, 204, 0.45) !important;
         box-shadow: 0 4px 14px rgba(0, 0, 0, 0.28);
     }
 
+    [data-bs-theme="dark"] .left-module-card,
+    [data-bs-theme="dark"] .right-module-card {
+        border: 2px solid rgba(117, 167, 204, 0.45) !important;
+        border-left: 2px solid rgba(117, 167, 204, 0.45) !important;
+        box-shadow: 0 4px 14px rgba(0, 0, 0, 0.28) !important;
+    }
+
     [data-bs-theme="dark"] .topbar-company-edit-btn {
         border-color: rgba(170,205,245,0.5);
         box-shadow: 0 1px 6px rgba(75,145,255,0.35);
@@ -2057,11 +2137,24 @@
         background: linear-gradient(165deg, color-mix(in srgb, var(--module-accent, #69a6d5) 12%, rgba(18, 28, 40, 0.94)) 0%, rgba(18, 28, 40, 0.94) 100%);
     }
 
-    [data-bs-theme="dark"] .right-module-card .card-header {
+    [data-bs-theme="dark"] .left-module-card {
+        border-color: rgba(140, 182, 219, 0.25);
+        box-shadow: 0 4px 16px rgba(5, 22, 40, 0.45);
+        background: linear-gradient(165deg, color-mix(in srgb, var(--module-accent, #69a6d5) 12%, rgba(18, 28, 40, 0.94)) 0%, rgba(18, 28, 40, 0.94) 100%);
+    }
+
+    [data-bs-theme="dark"] .right-module-card .card-header,
+    [data-bs-theme="dark"] .left-module-card .card-header {
         border-bottom-color: color-mix(in srgb, var(--module-accent, #69a6d5) 45%, #4b5563);
         background: color-mix(in srgb, var(--module-accent, #69a6d5) 18%, rgba(18, 28, 40, 0.98));
     }
 
+    [data-bs-theme="dark"] .case-details-shell {
+        border-color: transparent;
+        box-shadow: none;
+        background: transparent;
+    }
+
     [data-bs-theme="dark"] .module-title {
         color: #e5edf5;
     }
@@ -2988,37 +3081,73 @@
         window.caseTypeModuleDefaults = caseTypeModuleDefaults;
         window.caseTypeKey = window.caseTypeKey || {{ ((case.template_key or case.type or 'ticket')|lower)|tojson }};
 
-        window.forceCaseTabActivation = window.forceCaseTabActivation || function(tabId) {
+        window.syncCaseTabPaneVisibility = window.syncCaseTabPaneVisibility || function(activeTabId) {
-            if (!tabId) return;
+            if (!activeTabId) return;
             const tabContent = document.getElementById('caseTabsContent');
-            const targetPane = document.getElementById(tabId);
+            if (!tabContent) return;
-            if (!tabContent || !targetPane) return;
+            const paneIds = Array.from(document.querySelectorAll('#caseTabs [data-bs-target^="#"]'))
+                .map((btn) => (btn.getAttribute('data-bs-target') || '').replace('#', ''))
+                .filter(Boolean);
+            if (!paneIds.length) return;
 
-            tabContent.querySelectorAll(':scope > .tab-pane').forEach((pane) => {
+            paneIds.forEach((paneId) => {
-                pane.classList.remove('show', 'active');
+                const pane = document.getElementById(paneId);
-                pane.style.display = 'none';
+                if (pane && pane.parentElement !== tabContent) {
+                    tabContent.appendChild(pane);
+                }
             });
 
-            targetPane.classList.add('show', 'active');
+            paneIds.forEach((paneId) => {
-            targetPane.style.display = 'block';
+                const pane = document.getElementById(paneId);
+                if (!pane) return;
+                const isActive = pane.id === activeTabId;
+                pane.classList.toggle('active', isActive);
+                pane.classList.toggle('show', isActive);
+                pane.classList.remove('d-none');
+                pane.style.display = isActive ? 'block' : 'none';
+                pane.style.opacity = '1';
+                pane.style.visibility = isActive ? 'visible' : 'hidden';
+                pane.hidden = !isActive;
+            });
 
             const tabButtons = document.querySelectorAll('#caseTabs [data-bs-target]');
             tabButtons.forEach((btn) => {
-                btn.classList.toggle('active', btn.getAttribute('data-bs-target') === `#${tabId}`);
+                const isActive = btn.getAttribute('data-bs-target') === `#${activeTabId}`;
+                btn.classList.toggle('active', isActive);
+                btn.setAttribute('aria-selected', isActive ? 'true' : 'false');
+                btn.tabIndex = isActive ? 0 : -1;
             });
         };
+
+        window.forceCaseTabActivation = window.forceCaseTabActivation || function(tabId) {
+            if (!tabId) return;
+            const trigger = document.querySelector(`#caseTabs [data-bs-target="#${tabId}"]`);
+            if (!trigger) return;
+            window.syncCaseTabPaneVisibility(tabId);
+            trigger.dispatchEvent(new Event('shown.bs.tab', { bubbles: true }));
+            if (typeof window.loadCaseTabData === 'function') window.loadCaseTabData(tabId);
+        };
+
+        window.activateCaseTabFromButton = window.activateCaseTabFromButton || function(event, tabId) {
+            if (event) {
+                event.preventDefault();
+                event.stopPropagation();
+            }
+            window.forceCaseTabActivation(tabId);
+            return false;
+        };
     </script>
 
     <!-- Tabs Navigation -->
     <ul class="nav nav-tabs mb-4" id="caseTabs" role="tablist">
         <li class="nav-item" role="presentation">
-            <button class="nav-link active" id="details-tab" data-bs-toggle="tab" data-bs-target="#details" type="button" role="tab" onclick="forceCaseTabActivation('details', this)">
+            <button class="nav-link active" id="details-tab" data-bs-target="#details" type="button" role="tab" onclick="return activateCaseTabFromButton(event, 'details')">
                 <i class="bi bi-card-text me-2"></i>Sagsdetaljer
                 <span class="case-tab-count-badge" id="detailsTabCountBadge"></span>
             </button>
         </li>
         <li class="nav-item" role="presentation">
-            <button class="nav-link" id="solution-tab" data-bs-toggle="tab" data-bs-target="#solution" type="button" role="tab" data-module-tab="solution" onclick="forceCaseTabActivation('solution', this)">
+            <button class="nav-link" id="solution-tab" data-bs-target="#solution" type="button" role="tab" data-module-tab="solution" onclick="return activateCaseTabFromButton(event, 'solution')">
                 <i class="bi bi-lightbulb me-2"></i>Løsning
                 <span class="case-tab-count-badge" id="solutionTabCountBadge"></span>
                 {% if solution %}
@@ -3027,38 +3156,38 @@
             </button>
         </li>
         <li class="nav-item" role="presentation">
-            <button class="nav-link" id="emails-tab" data-bs-toggle="tab" data-bs-target="#emails" type="button" role="tab" data-module-tab="emails" onclick="forceCaseTabActivation('emails', this)">
+            <button class="nav-link" id="emails-tab" data-bs-target="#emails" type="button" role="tab" data-module-tab="emails" onclick="return activateCaseTabFromButton(event, 'emails')">
                 <i class="bi bi-envelope me-2"></i>E-mail
                 <span class="case-tab-count-badge" id="emailsTabCountBadge"></span>
                 <span id="emailTabUnreadBadge" class="email-tab-unread-badge" aria-label="Ulæste emails"></span>
             </button>
         </li>
         <li class="nav-item" role="presentation">
-            <button class="nav-link" id="sales-tab" data-bs-toggle="tab" data-bs-target="#sales" type="button" role="tab" data-module-tab="sales" onclick="forceCaseTabActivation('sales', this)">
+            <button class="nav-link" id="sales-tab" data-bs-target="#sales" type="button" role="tab" data-module-tab="sales" onclick="return activateCaseTabFromButton(event, 'sales')">
                 <i class="bi bi-basket3 me-2"></i>Varekøb & Salg
                 <span class="case-tab-count-badge" id="salesTabCountBadge"></span>
             </button>
         </li>
         <li class="nav-item" role="presentation">
-            <button class="nav-link" id="supplier-tab" data-bs-toggle="tab" data-bs-target="#supplier" type="button" role="tab" data-module-tab="supplier" onclick="forceCaseTabActivation('supplier', this)">
+            <button class="nav-link" id="supplier-tab" data-bs-target="#supplier" type="button" role="tab" data-module-tab="supplier" onclick="return activateCaseTabFromButton(event, 'supplier')">
                 <i class="bi bi-receipt-cutoff me-2"></i>Leverandør
                 <span class="case-tab-count-badge" id="supplierTabCountBadge"></span>
             </button>
         </li>
         <li class="nav-item" role="presentation">
-            <button class="nav-link" id="timetracking-tab" data-bs-toggle="tab" data-bs-target="#timetracking" type="button" role="tab"  onclick="forceCaseTabActivation('timetracking', this)">
+            <button class="nav-link" id="timetracking-tab" data-bs-target="#timetracking" type="button" role="tab" onclick="return activateCaseTabFromButton(event, 'timetracking')">
                 <i class="bi bi-clock-history me-2"></i>Tidsforbrug
                 <span class="case-tab-count-badge" id="timetrackingTabCountBadge"></span>
             </button>
         </li>
         <li class="nav-item" role="presentation">
-            <button class="nav-link" id="subscription-tab" data-bs-toggle="tab" data-bs-target="#subscription" type="button" role="tab" data-module-tab="subscription" onclick="forceCaseTabActivation('subscription', this)">
+            <button class="nav-link" id="subscription-tab" data-bs-target="#subscription" type="button" role="tab" data-module-tab="subscription" onclick="return activateCaseTabFromButton(event, 'subscription')">
                 <i class="bi bi-repeat me-2"></i>Abonnement
                 <span class="case-tab-count-badge" id="subscriptionTabCountBadge"></span>
             </button>
         </li>
         <li class="nav-item" role="presentation">
-            <button class="nav-link" id="reminders-tab" data-bs-toggle="tab" data-bs-target="#reminders" type="button" role="tab" data-module-tab="reminders" onclick="forceCaseTabActivation('reminders', this)">
+            <button class="nav-link" id="reminders-tab" data-bs-target="#reminders" type="button" role="tab" data-module-tab="reminders" onclick="return activateCaseTabFromButton(event, 'reminders')">
                 <i class="bi bi-bell me-2"></i>Påmindelser
                 <span class="case-tab-count-badge" id="remindersTabCountBadge"></span>
             </button>
@@ -3083,10 +3212,10 @@
     <!-- ROW 1: Main Info -->
     <div class="row mb-3">
         <!-- MAIN HERO CARD: Titel & Beskrivelse -->
-        <div class="col-12 mb-4 mt-2">
+        <div class="col-12 mb-3 mt-1">
-            <div class="card shadow-sm border-0 border-start border-4 border-primary" style="background-color: var(--bg-card); border-radius: 8px;">
+            <div class="case-details-shell">
-                <div class="card-body p-4 pt-4 pb-5 position-relative">
+                <div class="card-body p-3 position-relative">
-                    <div class="d-flex justify-content-between align-items-start mb-4">
+                    <div class="d-flex justify-content-between align-items-start mb-1 d-none">
                         <div class="w-100 pe-3">
                             <!-- Title view -->
                             <div id="sag-titel-view" class="d-flex align-items-center gap-2">
@@ -3106,106 +3235,114 @@
 
                     </div>
 
-                    <div class="mt-4 pt-3 border-top border-light" id="beskrivelse-section">
+                    <div class="pt-2" id="beskrivelse-section">
-                        <div class="case-left-panel">
+                        <div class="card left-module-card module-priority-normal">
-                            <div class="case-left-section-title"><i class="bi bi-card-text"></i>Opgavebeskrivelse</div>
+                            <div class="card-header d-flex justify-content-between align-items-center">
-                            <!-- View mode -->
+                                <h6 class="module-title"><i class="bi bi-card-text module-icon"></i>{{ case.titel }}</h6>
-                            <div id="beskrivelse-view" class="narrative-description" style="min-height: 120px; cursor: pointer;" ondblclick="startBeskrivelsEdit()">
+                                <button class="btn btn-sm btn-link text-info p-0" onclick="openManualHelp('Sag')" title="Hjælp til sagsbehandling"><i class="bi bi-question-circle"></i></button>
-                                <div class="narrative-lead">{{ case.titel }}</div>
-                                <div id="beskrivelse-text" class="prose" style="white-space: pre-wrap;">{{ case.beskrivelse or '' }}</div>
-                                {% if not case.beskrivelse %}
-                                <div id="beskrivelse-empty" class="text-center p-3">
-                                    <p class="text-muted fst-italic mb-2">Ingen opgavebeskrivelse tilføjet endnu.</p>
-                                    <span class="text-muted small"><i class="bi bi-pencil me-1"></i>Dobbeltklik for at tilføje</span>
-                                </div>
-                                {% endif %}
                             </div>
-                        </div>
+                            <div class="card-body">
-
+                                <!-- View mode -->
-                        <!-- Edit mode (hidden by default) -->
+                                <div id="beskrivelse-view" class="narrative-description" style="min-height: 120px; cursor: pointer;" ondblclick="startBeskrivelsEdit()">
-                        <div id="beskrivelse-editor" class="d-none mt-1">
+                                    <div id="beskrivelse-text" class="prose" style="white-space: pre-wrap;">{{ case.beskrivelse or '' }}</div>
-                            <textarea id="beskrivelse-textarea" class="form-control"
+                                    {% if not case.beskrivelse %}
-                                      rows="8" style="font-size: 1rem; line-height: 1.7; resize: vertical; min-height: 150px;"></textarea>
+                                    <div id="beskrivelse-empty" class="text-center p-3">
-                            <div class="d-flex justify-content-between align-items-center mt-2">
+                                        <p class="text-muted fst-italic mb-2">Ingen opgavebeskrivelse tilføjet endnu.</p>
-                                <span class="text-muted small"><i class="bi bi-keyboard me-1"></i>Ctrl+Enter for at gemme · Esc for at annullere</span>
+                                        <span class="text-muted small"><i class="bi bi-pencil me-1"></i>Dobbeltklik for at tilføje</span>
-                                <div class="d-flex gap-2">
-                                    <button class="btn btn-sm btn-outline-secondary" onclick="cancelBeskrivelsEdit()">
-                                        <i class="bi bi-x me-1"></i>Annuller
-                                    </button>
-                                    <button id="beskrivelse-rewrite-btn" type="button" class="btn btn-sm btn-outline-primary" onclick="rewriteCaseDescriptionWithApproval()">
-                                        <i class="bi bi-magic me-1"></i>Renskriv med AI
-                                    </button>
-                                    <button id="beskrivelse-save-btn" class="btn btn-sm btn-primary" onclick="saveBeskrivelsEdit()">
-                                        <i class="bi bi-check2 me-1"></i>Gem
-                                    </button>
-                                </div>
-                            </div>
-                        </div>
-
-                        <!-- History accordion -->
-                        <div id="beskrivelse-history-wrap" class="mt-3 d-none">
-                            <button class="btn btn-link btn-sm p-0 text-muted text-decoration-none"
-                                    type="button" data-bs-toggle="collapse" data-bs-target="#beskrivelse-history-collapse"
-                                    onclick="loadBeskrivelsHistory()">
-                                <i class="bi bi-clock-history me-1"></i><span id="beskrivelse-history-label">Historik</span>
-                            </button>
-                            <div class="collapse mt-2" id="beskrivelse-history-collapse">
-                                <div id="beskrivelse-history-list" class="list-group list-group-flush small border rounded">
-                                    <div class="list-group-item text-muted text-center py-3">
-                                        <span class="spinner-border spinner-border-sm me-1"></span> Indlæser...
                                     </div>
-                                </div>
-                            </div>
-                        </div>
-
-                        <div id="beskrivelse-comments-wrap">
-                            <div class="d-flex justify-content-between align-items-center mb-3">
-                                <h6 class="text-muted text-uppercase small mb-0 fw-bold" style="letter-spacing: 0.05em;">
-                                    <i class="bi bi-chat-left-text me-1"></i>Kommentarer
-                                </h6>
-                                <span class="badge bg-secondary">{{ comments|length if comments else 0 }}</span>
-                            </div>
-
-                            <div class="comment-thread" id="comments-container">
-                                {% if comments %}
-                                    {% for comment in comments %}
-                                    {% if comment.er_system_besked or comment.forfatter == 'System' %}
-                                    <div class="comment-item comment-system" data-created-at="{{ comment.created_at.timestamp() if comment.created_at else 0 }}">
-                                    {% elif comment.er_intern %}
-                                    <div class="comment-item comment-internal" data-created-at="{{ comment.created_at.timestamp() if comment.created_at else 0 }}">
-                                    {% else %}
-                                    <div class="comment-item comment-external" data-created-at="{{ comment.created_at.timestamp() if comment.created_at else 0 }}">
                                     {% endif %}
-                                        <div class="comment-meta">
+                                </div>
-                                            <span class="comment-avatar">{{ (comment.forfatter or 'Bruger')[:2]|upper }}</span>
+
-                                            <b>{{ comment.forfatter }}</b>
+                                <!-- Edit mode (hidden by default) -->
-                                            <span class="comment-time">{{ comment.created_at.strftime('%d/%m-%Y %H:%M') }}</span>
+                                <div id="beskrivelse-editor" class="d-none mt-1">
+                                    <textarea id="beskrivelse-textarea" class="form-control"
+                                              rows="8" style="font-size: 1rem; line-height: 1.7; resize: vertical; min-height: 150px;"></textarea>
+                                    <div class="d-flex justify-content-between align-items-center mt-2">
+                                        <span class="text-muted small"><i class="bi bi-keyboard me-1"></i>Ctrl+Enter for at gemme · Esc for at annullere</span>
+                                        <div class="d-flex gap-2">
+                                            <button class="btn btn-sm btn-outline-secondary" onclick="cancelBeskrivelsEdit()">
+                                                <i class="bi bi-x me-1"></i>Annuller
+                                            </button>
+                                            <button id="beskrivelse-rewrite-btn" type="button" class="btn btn-sm btn-outline-primary" onclick="rewriteCaseDescriptionWithApproval()">
+                                                <i class="bi bi-magic me-1"></i>Renskriv med AI
+                                            </button>
+                                            <button id="beskrivelse-save-btn" class="btn btn-sm btn-primary" onclick="saveBeskrivelsEdit()">
+                                                <i class="bi bi-check2 me-1"></i>Gem
+                                            </button>
                                         </div>
-                                        <div class="comment-body" data-comment-raw="{{ comment.indhold|e }}">{{ comment.indhold|replace('\n', '<br>')|safe }}</div>
                                     </div>
-                                    {% endfor %}
+                                </div>
-                                {% else %}
+
-                                <p class="text-center text-muted my-3">Ingen kommentarer endnu.</p>
+                                <!-- History accordion -->
-                                {% endif %}
+                                <div id="beskrivelse-history-wrap" class="mt-3 d-none">
+                                    <button class="btn btn-link btn-sm p-0 text-muted text-decoration-none"
+                                            type="button" data-bs-toggle="collapse" data-bs-target="#beskrivelse-history-collapse"
+                                            onclick="loadBeskrivelsHistory()">
+                                        <i class="bi bi-clock-history me-1"></i><span id="beskrivelse-history-label">Historik</span>
+                                    </button>
+                                    <div class="collapse mt-2" id="beskrivelse-history-collapse">
+                                        <div id="beskrivelse-history-list" class="list-group list-group-flush small border rounded">
+                                            <div class="list-group-item text-muted text-center py-3">
+                                                <span class="spinner-border spinner-border-sm me-1"></span> Indlæser...
+                                            </div>
+                                        </div>
+                                    </div>
+                                </div>
                             </div>
+                        </div>
 
-                            <div id="comment-quick-reply-host"></div>
+                        <div class="card left-module-card module-priority-low">
+                            <div class="card-header d-flex justify-content-between align-items-center">
+                                <h6 class="module-title"><i class="bi bi-chat-left-text module-icon"></i>Kommentarer</h6>
+                                <span id="commentsTotalCountBadge" class="badge bg-secondary">{{ comments|length if comments else 0 }}</span>
+                            </div>
+                            <div class="card-body">
+                                <div id="beskrivelse-comments-wrap">
 
-                            <div class="mt-3">
+                                    <div class="comment-thread" id="comments-container">
-                                <form id="comment-form" onsubmit="submitComment(event)">
+                                        {% if comments %}
-                                    <div class="comment-composer">
+                                            {% for comment in comments %}
-                                        <textarea class="form-control" name="indhold" required placeholder="Skriv en kommentar..." rows="2" style="resize: none;"></textarea>
+                                            {% if comment.er_system_besked or comment.forfatter == 'System' %}
-                                        <button type="submit" class="btn btn-primary d-flex align-items-center justify-content-center comment-send">
+                                            <div class="comment-item comment-system" data-created-at="{{ comment.created_at.timestamp() if comment.created_at else 0 }}">
-                                            <i class="bi bi-send me-1"></i>Send
+                                            {% elif comment.er_intern %}
-                                        </button>
+                                            <div class="comment-item comment-internal" data-created-at="{{ comment.created_at.timestamp() if comment.created_at else 0 }}">
+                                            {% else %}
+                                            <div class="comment-item comment-external" data-created-at="{{ comment.created_at.timestamp() if comment.created_at else 0 }}">
+                                            {% endif %}
+                                                <div class="comment-meta">
+                                                    <span class="comment-avatar">{{ (comment.forfatter or 'Bruger')[:2]|upper }}</span>
+                                                    <b>{{ comment.forfatter }}</b>
+                                                    <span class="comment-time">{{ comment.created_at.strftime('%d/%m-%Y %H:%M') }}</span>
+                                                </div>
+                                                <div class="comment-body" data-comment-raw="{{ comment.indhold|e }}">{{ comment.indhold|replace('\n', '<br>')|safe }}</div>
+                                            </div>
+                                            {% endfor %}
+                                        {% else %}
+                                        <p class="text-center text-muted my-3">Ingen kommentarer endnu.</p>
+                                        {% endif %}
+                                    </div>
+
+                                    <div id="comment-quick-reply-host"></div>
+
+                                    <div class="mt-3">
+                                        <form id="comment-form" onsubmit="submitComment(event)">
+                                            <div class="comment-composer">
+                                                <textarea class="form-control" name="indhold" required placeholder="Skriv en kommentar..." rows="2" style="resize: none;"></textarea>
+                                                <button type="submit" class="btn btn-primary d-flex align-items-center justify-content-center comment-send">
+                                                    <i class="bi bi-send me-1"></i>Send
+                                                </button>
+                                            </div>
+                                        </form>
                                     </div>
-                                </form>
                             </div>
                         </div>
                     </div>
                 </div>
             </div>
         </div>
+        </div>
+    </div>
+    </div>
     </div>
     
     <!-- ROW 1B: Pipeline -->
@@ -3876,6 +4013,7 @@
         let selectedRelationCaseId = null;
         let customerSearchMode = 'link';
         const caseTypeKey = {{ ((case.template_key or case.type or 'ticket')|lower)|tojson }};
+        const initialCaseTagsSnapshot = {{ (tags or [])|tojson }};
 
         async function markCaseAsRecentlyOpened() {
             try {
@@ -3954,22 +4092,11 @@
         function forceCaseTabActivation(tabId) {
             if (!tabId) return;
 
-            const tabContent = document.getElementById('caseTabsContent');
+            const trigger = document.querySelector(`#caseTabs [data-bs-target="#${tabId}"]`);
-            const targetPane = document.getElementById(tabId);
+            if (!trigger) return;
-            if (!tabContent || !targetPane) return;
+            window.syncCaseTabPaneVisibility(tabId);
-
+            trigger.dispatchEvent(new Event('shown.bs.tab', { bubbles: true }));
-            tabContent.querySelectorAll(':scope > .tab-pane').forEach((pane) => {
+            if (typeof window.loadCaseTabData === 'function') window.loadCaseTabData(tabId);
-                pane.classList.remove('show', 'active');
-                pane.style.display = 'none';
-            });
-
-            targetPane.classList.add('show', 'active');
-            targetPane.style.display = 'block';
-
-            const tabButtons = document.querySelectorAll('#caseTabs [data-bs-target]');
-            tabButtons.forEach((btn) => {
-                btn.classList.toggle('active', btn.getAttribute('data-bs-target') === `#${tabId}`);
-            });
         }
 
         window.moduleDisplayNames = {
@@ -4093,11 +4220,8 @@
 
             const caseTabs = document.getElementById('caseTabs');
             if (caseTabs) {
-                caseTabs.addEventListener('shown.bs.tab', async (event) => {
+                const loadCaseTabData = async (tabId) => {
-                    const targetSelector = event?.target?.getAttribute('data-bs-target') || '';
+                    if (!tabId) return;
-                    const tabId = targetSelector.startsWith('#') ? targetSelector.slice(1) : targetSelector;
-
-                    forceCaseTabActivation(tabId);
 
                     try {
                         if (tabId === 'sales' && typeof loadVarekobSalg === 'function') {
@@ -4113,20 +4237,27 @@
                     } catch (tabLoadError) {
                         console.error('Tab data reload failed:', tabLoadError);
                     }
-                });
+                };
+                window.loadCaseTabData = loadCaseTabData;
 
-                caseTabs.addEventListener('click', (event) => {
+                caseTabs.addEventListener('click', async (event) => {
-                    const btn = event.target.closest('[data-bs-target]');
+                    const trigger = event.target.closest('[data-bs-target]');
-                    if (!btn) return;
+                    if (!trigger || !caseTabs.contains(trigger)) return;
-                    const targetSelector = btn.getAttribute('data-bs-target') || '';
+
+                    event.preventDefault();
+                    event.stopImmediatePropagation();
+
+                    const targetSelector = trigger.getAttribute('data-bs-target') || '';
                     const tabId = targetSelector.startsWith('#') ? targetSelector.slice(1) : targetSelector;
-                    if (tabId) {
+                    if (!tabId) return;
-                        setTimeout(() => forceCaseTabActivation(tabId), 0);
+
-                    }
+                    window.syncCaseTabPaneVisibility(tabId);
-                });
+                    trigger.dispatchEvent(new Event('shown.bs.tab', { bubbles: true }));
+                    await loadCaseTabData(tabId);
+                }, true);
             }
 
-            forceCaseTabActivation('details');
+            window.syncCaseTabPaneVisibility('details');
 
             // Focus on title when create modal opens
             const createModalEl = document.getElementById('createRelatedCaseModal');
@@ -5231,6 +5362,12 @@
                     tags = await loadLegacyTags();
                 }
 
+                // Final fallback: use server-rendered tags from page context when API calls return empty.
+                if ((!Array.isArray(tags) || tags.length === 0) && Array.isArray(initialCaseTagsSnapshot) && initialCaseTagsSnapshot.length > 0) {
+                    tags = normalizeLegacyTags(initialCaseTagsSnapshot);
+                    usingLegacyCaseTags = true;
+                }
+
                 if (!Array.isArray(tags) || tags.length === 0) {
                     moduleContainer.innerHTML = '<div class="p-3 text-center text-muted small">Ingen tags paaa sagen endnu</div>';
                     setModuleContentState('tags', false);
@@ -5240,9 +5377,9 @@
                 moduleContainer.innerHTML = tags.map((tag) => `
                     <span class="badge me-1 mb-1" style="background-color: ${tag.color};">
                         ${tag.icon ? `<i class="bi ${tag.icon}"></i> ` : ''}${escapeHtml(tag.name)}
-                        <button type="button" class="btn-close btn-close-white btn-sm ms-1"
+                        ${tag.id ? `<button type="button" class="btn-close btn-close-white btn-sm ms-1"
                                 onclick="removeCaseTagAndSync(${tag.id})"
-                                style="font-size: 0.6rem; vertical-align: middle;"></button>
+                                style="font-size: 0.6rem; vertical-align: middle;"></button>` : ''}
                     </span>
                 `).join('');
 
@@ -5961,8 +6098,9 @@
         </div>
     </div>
     
-    </div>
+    </div> <!-- /#inner-center-col -->
-    </div></div><!-- slut inner cols -->
+</div> <!-- /.row.g-4 (inner) -->
+</div> <!-- /#case-left-column -->
 <div class="col-xl-4 col-lg-4" id="case-right-column">
         <div class="right-modules-grid">
             <div class="card h-100 d-flex flex-column right-module-card module-priority-normal" data-module="locations" data-has-content="unknown">
@@ -5982,8 +6120,8 @@
                 <div class="card h-100 d-flex flex-column right-module-card module-priority-low" data-module="tags" data-has-content="unknown">
                 <div class="card-header d-flex justify-content-between align-items-center">
                     <h6 class="module-title"><i class="bi bi-tags-fill module-icon"></i>TAGS</h6>
-                    <button class="btn btn-sm btn-outline-primary"
+                        <button type="button" class="btn btn-sm btn-outline-primary"
-                            onclick="window.showTagPicker('case', {{ case.id }}, () => syncCaseTagsUi())"
+                            onclick="event.stopPropagation(); window.showTagPicker('case', {{ case.id }}, () => syncCaseTagsUi()); return false;"
                             title="Tilføj tag">
                         <i class="bi bi-plus-lg"></i>
                     </button>
@@ -6293,6 +6431,42 @@
     </div>
     </div> <!-- End Details Tab -->
 
+    <script>
+        (function () {
+            function normalizeDetailsColumns() {
+                const detailsPane = document.getElementById('details');
+                if (!detailsPane) return;
+
+                let detailsRow = null;
+                try {
+                    detailsRow = detailsPane.querySelector(':scope > .row.g-4');
+                } catch (e) {
+                    detailsRow = detailsPane.querySelector('.row.g-4');
+                }
+                const leftCol = detailsPane.querySelector('#case-left-column');
+                const rightCol = detailsPane.querySelector('#case-right-column');
+
+                if (!detailsRow || !leftCol || !rightCol) return;
+
+                // Defensive: ensure right column is a direct sibling inside the outer details row.
+                if (rightCol.parentElement !== detailsRow) {
+                    detailsRow.appendChild(rightCol);
+                }
+
+                if (!leftCol.classList.contains('col-xl-8')) leftCol.classList.add('col-xl-8');
+                if (!leftCol.classList.contains('col-lg-8')) leftCol.classList.add('col-lg-8');
+                if (!rightCol.classList.contains('col-xl-4')) rightCol.classList.add('col-xl-4');
+                if (!rightCol.classList.contains('col-lg-4')) rightCol.classList.add('col-lg-4');
+            }
+
+            if (document.readyState === 'loading') {
+                document.addEventListener('DOMContentLoaded', normalizeDetailsColumns);
+            } else {
+                normalizeDetailsColumns();
+            }
+        })();
+    </script>
+
     <!-- E-mail Tab -->
     <div class="tab-pane fade" id="emails" role="tabpanel" tabindex="0" data-module="emails" data-has-content="unknown" style="display:none;">
         <div class="card mb-3">
@@ -7610,7 +7784,8 @@
 
         function _refreshCommentCountBadge() {
             const container = document.getElementById('comments-container');
-            const badge = document.querySelector('#beskrivelse-comments-wrap .badge.bg-secondary');
+            const badge = document.getElementById('commentsTotalCountBadge')
+                || document.querySelector('#beskrivelse-comments-wrap .badge.bg-secondary');
             if (!container || !badge) return;
             badge.textContent = String(container.querySelectorAll('.comment-item').length);
         }
@@ -11964,10 +12139,23 @@
         }
 
         function updateRightColumnVisibility() {
+            const detailsPane = document.getElementById('details');
             const rightColumn = document.getElementById('case-right-column');
             const leftColumn = document.getElementById('case-left-column');
             if (!rightColumn || !leftColumn) return;
 
+            if (detailsPane) {
+                let detailsRow = null;
+                try {
+                    detailsRow = detailsPane.querySelector(':scope > .row.g-4');
+                } catch (e) {
+                    detailsRow = detailsPane.querySelector('.row.g-4');
+                }
+                if (detailsRow && rightColumn.parentElement !== detailsRow) {
+                    detailsRow.appendChild(rightColumn);
+                }
+            }
+
             const visibleRightModules = rightColumn.querySelectorAll('.right-module-card:not(.d-none)');
             if (visibleRightModules.length === 0) {
                 rightColumn.classList.add('d-none');
@@ -12883,8 +13071,7 @@
         function openCaseEmailTab() {
             const trigger = document.getElementById('emails-tab');
             if (!trigger) return;
-            const instance = bootstrap.Tab.getOrCreateInstance(trigger);
+            forceCaseTabActivation('emails');
-            instance.show();
         }
 
         window.quickReplyToEmailFromComment = async function(emailId) {
@@ -13963,7 +14150,7 @@
 
         async function loadSubscriptionForCase() {
             try {
-                const res = await fetch(`/api/v1/sag-subscriptions/by-sag/${subscriptionCaseId}`);
+                const res = await fetch(`/api/v1/sag-subscriptions/by-sag/${subscriptionCaseId}?allow_missing=true`);
                 if (res.status === 404) {
                     showSubscriptionCreateForm();
                     setModuleContentState('subscription', false);
@@ -13972,7 +14159,15 @@
                 if (!res.ok) {
                     throw new Error('Kunne ikke hente abonnement');
                 }
-                const subscription = await res.json();
+                const payload = await res.json();
+                const subscription = payload && Object.prototype.hasOwnProperty.call(payload, 'subscription')
+                    ? payload.subscription
+                    : payload;
+                if (!subscription || !subscription.id) {
+                    showSubscriptionCreateForm();
+                    setModuleContentState('subscription', false);
+                    return;
+                }
                 renderSubscription(subscription);
                 setModuleContentState('subscription', true);
             } catch (e) {
@@ -14153,8 +14348,9 @@
                     || document.querySelector(`[data-module-tab="${tabParam}"]`);
                 if (tabBtn) {
                     setTimeout(() => {
-                        bootstrap.Tab.getOrCreateInstance(tabBtn).show();
+                        const targetSelector = tabBtn.getAttribute('data-bs-target') || '';
-                        forceCaseTabActivation(tabParam);
+                        const targetTabId = targetSelector.startsWith('#') ? targetSelector.slice(1) : tabParam;
+                        forceCaseTabActivation(targetTabId);
                     }, 300);
                 }
             }

app/subscriptions/backend/router.py

@@ -208,7 +208,7 @@ def _auto_map_customer(account_id: Optional[str], customer_name: Optional[str],
 
 
 @router.get("/sag-subscriptions/by-sag/{sag_id}", response_model=Dict[str, Any])
-async def get_subscription_by_sag(sag_id: int):
+async def get_subscription_by_sag(sag_id: int, allow_missing: bool = Query(False)):
     """Get latest subscription for a case."""
     try:
         query = """
@@ -236,6 +236,8 @@ async def get_subscription_by_sag(sag_id: int):
         """
         subscription = execute_query_single(query, (sag_id,))
         if not subscription:
+            if allow_missing:
+                return {"subscription": None, "line_items": []}
             raise HTTPException(status_code=404, detail="Subscription not found")
         items = execute_query(
             """

static/js/tag-picker.js

@@ -273,16 +273,47 @@ class TagPicker {
                 });
 
                 if (!response.ok) {
-                    const error = await response.json();
+                    let errorDetail = '';
-                    if (error.detail.includes('already exists')) {
+                    try {
+                        const error = await response.json();
+                        errorDetail = String(error?.detail || '');
+                    } catch (parseError) {
+                        errorDetail = '';
+                    }
+
+                    if (response.status === 409 || errorDetail.toLowerCase().includes('already exists')) {
                         alert('Dette tag er allerede tilføjet');
                         return;
                     }
-                    throw new Error(error.detail);
-                }
 
-                // Show success feedback
+                    // Backward compatibility: some case pages still persist tags via /sag/{id}/tags.
-                this.showSuccess(tag.name);
+                    if (String(this.contextType).toLowerCase() === 'case') {
+                        const legacyResponse = await fetch(`/api/v1/sag/${this.contextId}/tags`, {
+                            method: 'POST',
+                            headers: { 'Content-Type': 'application/json' },
+                            credentials: 'include',
+                            body: JSON.stringify({ tag_navn: tag.name })
+                        });
+
+                        if (legacyResponse.ok) {
+                            this.showSuccess(tag.name);
+                        } else {
+                            let legacyErrorDetail = '';
+                            try {
+                                const legacyError = await legacyResponse.json();
+                                legacyErrorDetail = String(legacyError?.detail || '');
+                            } catch (parseError) {
+                                legacyErrorDetail = '';
+                            }
+                            throw new Error(legacyErrorDetail || errorDetail || 'Kunne ikke tilføje tag');
+                        }
+                    } else {
+                        throw new Error(errorDetail || 'Kunne ikke tilføje tag');
+                    }
+                } else {
+                    // Show success feedback
+                    this.showSuccess(tag.name);
+                }
             } catch (error) {
                 console.error('Error adding tag:', error);
                 alert('Fejl ved tilføjelse af tag: ' + error.message);