UI-Redesign: AegisSight Design, Filter-Popover, Header-Umbau

- Session-Timeout auf 60 Minuten erhöht (ACCESS_TOKEN_EXPIRY + SESSION_TIMEOUT)
- AegisSight Light Theme: Gold-Akzent (#C8A851) statt Indigo
- Navigation-Tabs in eigene Zeile unter Header verschoben (HTML-Struktur)
- Filter-Bar durch kompaktes Popover mit Checkboxen ersetzt (Mehrfachauswahl)
- Archiv-Funktion repariert (lädt jetzt per API statt leerem Store)
- Filter-Bugs behoben: Reset-Button ID, Default-Werte, Ohne-Datum-Filter
- Mehrspalten-Layout Feature entfernt
- Online-Status vom Header an User-Avatar verschoben (grüner Punkt)
- Lupen-Icon entfernt
- CLAUDE.md: Docker-Deploy und CSS-Tricks Regeln aktualisiert

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

frontend/js/utils.js

@@ -492,37 +492,55 @@ export function filterTasks(tasks, filters, searchResultIds = [], columns = [])
       }
     }
 
-    // Priority filter
-    if (filters.priority && filters.priority !== 'all') {
-      if (task.priority !== filters.priority) return false;
+    // Priority filter (string or array)
+    if (filters.priority && filters.priority.length > 0) {
+      const priorityFilter = Array.isArray(filters.priority) ? filters.priority : [filters.priority];
+      if (!priorityFilter.includes(task.priority)) return false;
     }
 
-    // Assignee filter
-    if (filters.assignee && filters.assignee !== 'all') {
-      if (task.assignedTo !== parseInt(filters.assignee)) return false;
+    // Assignee filter (string or array)
+    if (filters.assignee && filters.assignee.length > 0) {
+      const assigneeFilter = Array.isArray(filters.assignee) ? filters.assignee : [filters.assignee];
+      const assigneeIds = assigneeFilter.map(id => parseInt(id));
+      const taskAssigneeId = task.assignedTo;
+      const taskAssignees = task.assignees?.map(a => a.id || a) || [];
+      const matches = assigneeIds.some(id => id === taskAssigneeId || taskAssignees.includes(id));
+      if (!matches) return false;
     }
 
-    // Label filter
-    if (filters.label && filters.label !== 'all') {
-      const hasLabel = task.labels?.some(l => l.id === parseInt(filters.label));
+    // Label filter (string or array)
+    if (filters.label && filters.label.length > 0) {
+      const labelFilter = Array.isArray(filters.label) ? filters.label : [filters.label];
+      const labelIds = labelFilter.map(id => parseInt(id));
+      const hasLabel = task.labels?.some(l => labelIds.includes(l.id));
       if (!hasLabel) return false;
     }
 
-    // Due date filter
-    if (filters.dueDate && filters.dueDate !== 'all' && filters.dueDate !== '') {
-      const status = getDueDateStatus(task.dueDate);
+    // Due date filter (string or array)
+    if (filters.dueDate && filters.dueDate.length > 0) {
+      const dueDateFilter = Array.isArray(filters.dueDate) ? filters.dueDate : [filters.dueDate];
+      let matches = false;
 
-      // Bei "überfällig" erledigte Aufgaben ausschließen
-      if (filters.dueDate === 'overdue') {
-        if (status !== 'overdue' || isTaskCompleted(task)) return false;
-      }
-      if (filters.dueDate === 'today' && status !== 'today') return false;
-      if (filters.dueDate === 'week') {
-        const due = new Date(task.dueDate);
-        const weekFromNow = new Date();
-        weekFromNow.setDate(weekFromNow.getDate() + 7);
-        if (!task.dueDate || due > weekFromNow) return false;
+      for (const filterVal of dueDateFilter) {
+        if (filterVal === 'none') {
+          if (!task.dueDate) { matches = true; break; }
+        } else if (filterVal === 'overdue') {
+          const status = getDueDateStatus(task.dueDate);
+          if (status === 'overdue' && !isTaskCompleted(task)) { matches = true; break; }
+        } else if (filterVal === 'today') {
+          const status = getDueDateStatus(task.dueDate);
+          if (status === 'today') { matches = true; break; }
+        } else if (filterVal === 'week') {
+          if (task.dueDate) {
+            const due = new Date(task.dueDate);
+            const weekFromNow = new Date();
+            weekFromNow.setDate(weekFromNow.getDate() + 7);
+            if (due <= weekFromNow) { matches = true; break; }
+          }
+        }
       }
+
+      if (!matches) return false;
     }
 
     return true;