feat(kanban): button to stretch the board to the full window width

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

CHANGELOG.md

@@ -6,7 +6,10 @@ Das Format folgt [Keep a Changelog](https://keepachangelog.com/de/1.1.0/), die V
 
 ## [Unreleased]
 
-## [0.15.2] - 2026-10-31
+## [0.16.0] - 2026-10-31
+
+### Added
+- Kanban: Neben „Spalten anpassen“ streckt ein kleiner Knopf (diagonale Pfeile) das Board auf die volle Fensterbreite; alle Spalten stehen dann nebeneinander. Die Einstellung merkt sich der Browser, am Handy gibt es den Knopf nicht.
 
 ### Fixed
 - Aufgaben: Ein neuer Quick-Dump-Eintrag (z. B. per Spracheingabe über das gehaltene Plus) tauchte kurz oben in den Aufgaben auf, obwohl er in die Triage gehört. Live-Änderungen nehmen jetzt nur noch echte Aufgaben auf; eine per „Rückgängig“ zurück in die Triage geholte Aufgabe verschwindet auch sofort aus der Liste.
@@ -371,8 +374,8 @@ Das Format folgt [Keep a Changelog](https://keepachangelog.com/de/1.1.0/), die V
 - Geteilte Listen (Einkaufs-, Pack- und Checklisten) mit `#Kategorie`-Gruppierung, Mengenangaben und Echtzeit-Abhaken.
 - Benutzer-, Gruppen- und Admin-Verwaltung (Ersteinrichtungs-Assistent, Einladungscodes, Profilbilder, persönliche API-Keys & Webhook-Ingest `/api/v1/webhooks/ingest`, JSON-Datenexport) sowie CSS-Theme-Engine mit 4 Themes (`Dark`, `Light`, `High Contrast`, `Soft`) und PWA-Unterstützung.
 
-[Unreleased]: https://git.dsit.me/sandrodach/MindSift/compare/v0.15.2...dev
-[0.15.2]: https://git.dsit.me/sandrodach/MindSift/compare/v0.15.1...v0.15.2
+[Unreleased]: https://git.dsit.me/sandrodach/MindSift/compare/v0.16.0...dev
+[0.16.0]: https://git.dsit.me/sandrodach/MindSift/compare/v0.15.1...v0.16.0
 [0.15.1]: https://git.dsit.me/sandrodach/MindSift/compare/v0.15.0...v0.15.1
 [0.15.0]: https://git.dsit.me/sandrodach/MindSift/compare/v0.14.3...v0.15.0
 [0.14.3]: https://git.dsit.me/sandrodach/MindSift/compare/v0.14.2...v0.14.3

frontend/package-lock.json

@@ -1,12 +1,12 @@
 {
   "name": "mindsift-frontend",
-  "version": "0.15.2",
+  "version": "0.16.0",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "mindsift-frontend",
-      "version": "0.15.2",
+      "version": "0.16.0",
       "license": "Unlicense",
       "dependencies": {
         "@fontsource-variable/inter": "5.3.0",

frontend/package.json

@@ -1,7 +1,7 @@
 {
   "name": "mindsift-frontend",
   "private": true,
-  "version": "0.15.2",
+  "version": "0.16.0",
   "license": "Unlicense",
   "type": "module",
   "scripts": {

frontend/src/App.tsx

@@ -164,6 +164,8 @@ export const App: React.FC = () => {
   const [deck, setDeck] = useState<Thought[]>([]);
   const [lists, setLists] = useState<SharedList[]>([]);
   const [activeTab, setActiveTab] = useState<ActiveTab>('triage');
+  // Kanban asked for the full window width (reported by the tasks view)
+  const [tasksWide, setTasksWide] = useState(false);
   const [previousTab, setPreviousTab] = useState<ActiveTab>('triage');
   const [selectedDocId, setSelectedDocId] = useState<string | null>(null);
   const [selectedBlockId, setSelectedBlockId] = useState<string | null>(null);
@@ -1168,7 +1170,9 @@ export const App: React.FC = () => {
       {/* Main Container */}
       {/* The workspace fills the window exactly and scrolls only inside the note, never the page */}
       <main
-        className={`flex-1 max-w-6xl w-full mx-auto px-3 sm:px-4 pt-3 pb-24 ${
+        className={`flex-1 w-full mx-auto px-3 sm:px-4 pt-3 pb-24 ${
+          activeTab === 'tasks' && tasksWide ? 'lg:max-w-none lg:px-6' : 'max-w-6xl'
+        } ${
           activeTab === 'workspace' ? 'min-h-0 flex flex-col sm:pb-0' : 'sm:pb-6'
         }`}
       >
@@ -1192,6 +1196,7 @@ export const App: React.FC = () => {
                 refreshTrigger={refreshRevision}
                 initialSelectedTaskId={selectedTaskId}
                 openTasksCount={stats.tasksOpenCount}
+                onWideChange={setTasksWide}
               />
             )}
 

frontend/src/features/triage/TasksView.tsx

@@ -8,6 +8,8 @@ import {
   FileText,
   LayoutList,
   Columns,
+  Maximize2,
+  Minimize2,
   ArrowRight,
   ArrowLeft,
   Edit3,
@@ -59,8 +61,11 @@ interface TasksViewProps {
   refreshTrigger?: number;
   initialSelectedTaskId?: string | null;
   openTasksCount?: number; // all open tasks incl. shared lists (same as the nav bar counter)
+  onWideChange?: (wide: boolean) => void; // Kanban stretched to the full window width
 }
 
+const KANBAN_WIDE_KEY = 'mindsift:kanban_wide';
+
 export const TasksView: React.FC<TasksViewProps> = ({
   currentUser,
   onRefreshStats,
@@ -68,8 +73,31 @@ export const TasksView: React.FC<TasksViewProps> = ({
   refreshTrigger = 0,
   initialSelectedTaskId,
   openTasksCount,
+  onWideChange,
 }) => {
   const [viewMode, setViewMode] = useState<'list' | 'kanban'>('list');
+  // Wide Kanban: the board takes the whole window and shows every column in one row
+  const [kanbanWide, setKanbanWide] = useState(() => {
+    try {
+      return localStorage.getItem(KANBAN_WIDE_KEY) === '1';
+    } catch {
+      return false;
+    }
+  });
+  const toggleKanbanWide = () => {
+    const next = !kanbanWide;
+    setKanbanWide(next);
+    try {
+      localStorage.setItem(KANBAN_WIDE_KEY, next ? '1' : '0');
+    } catch {
+      // only a convenience
+    }
+  };
+  const isKanbanWide = viewMode === 'kanban' && kanbanWide;
+  useEffect(() => {
+    onWideChange?.(isKanbanWide);
+  }, [isKanbanWide, onWideChange]);
+  useEffect(() => () => onWideChange?.(false), [onWideChange]);
   const [filter, setFilter] = useState<'open' | 'done' | 'discarded'>('open');
   const [tasks, setTasks] = useState<Thought[]>([]);
   const [taskLists, setTaskLists] = useState<TaskList[]>([]);
@@ -1650,7 +1678,8 @@ export const TasksView: React.FC<TasksViewProps> = ({
         {/* Group By & Sort By Dropdowns & Manage Columns button */}
         <div className="flex items-center gap-2 flex-shrink-0 ml-auto">
           {viewMode === 'kanban' ? (
-            !isSelectedListReadOnly && (
+            <>
+              {!isSelectedListReadOnly && (
                 <button
                   onClick={() => setShowManageColumnsModal(true)}
                   className="btn-action h-7 px-2.5 text-xs flex items-center gap-1.5"
@@ -1659,7 +1688,21 @@ export const TasksView: React.FC<TasksViewProps> = ({
                   <Columns className="w-3.5 h-3.5 text-accent" />
                   <span>Spalten anpassen</span>
                 </button>
-            )
+              )}
+              <button
+                type="button"
+                onClick={toggleKanbanWide}
+                aria-pressed={kanbanWide}
+                className="btn-action h-7 w-7 p-0 hidden lg:inline-flex items-center justify-center"
+                title={kanbanWide ? 'Board wieder normal breit' : 'Board auf volle Breite strecken'}
+              >
+                {kanbanWide ? (
+                  <Minimize2 className="w-3.5 h-3.5 text-accent" />
+                ) : (
+                  <Maximize2 className="w-3.5 h-3.5 text-accent" />
+                )}
+              </button>
+            </>
           ) : (
             <>
               {/* Group By */}
@@ -2112,7 +2155,12 @@ export const TasksView: React.FC<TasksViewProps> = ({
       {viewMode === 'kanban' ? (
         /* DYNAMIC KANBAN BOARD */
         <div className="space-y-2">
-          <div className="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-4 gap-3 pt-1">
+          <div
+            className={`grid grid-cols-1 md:grid-cols-2 gap-3 pt-1 ${
+              isKanbanWide ? 'lg:grid-cols-[repeat(var(--kanban-cols),minmax(0,1fr))]' : 'lg:grid-cols-4'
+            }`}
+            style={isKanbanWide ? ({ '--kanban-cols': activeColumns.length } as React.CSSProperties) : undefined}
+          >
             {activeColumns.map((col, colIdx) => {
               const colTasks = kanbanTasks.filter((t) => {
                 if (col.isDone) {