feat: persist view style and start-on preference per device

viewStyle, showTimeGrid, and startDayOffset now also write to a device
cookie so each device remembers its own view independently. Cookie
wins over DB on load, giving phone/desktop their own default view
without losing the cross-device DB fallback.

- DEVICE_ALSO_COOKIE_KEYS: viewStyle, showTimeGrid, startDayOffset
- saveSetting writes cookie for these in addition to DB
- viewStyle and showTimeGrid lazy-init from cookie on first render
- Both fetchProfile and fetchUserInfo apply cookie overrides last

v1.94.1

package.json

@@ -1,6 +1,6 @@
 {
   "name": "my-weekly-todo-list",
-  "version": "1.94.0",
+  "version": "1.94.1",
   "description": "A web-based weekly task management application that organizes to-dos and calendar events in a single, intuitive weekly view",
   "main": "index.js",
   "scripts": {

src/components/WeeklyView.tsx

@@ -117,6 +117,9 @@ const DEVICE_SETTINGS_KEYS = ["viewDays", "cellDuration", "startHour", "endHour"
 const DEVICE_VIEW_SETTINGS_KEYS = ["showSomeday", "showAllDayEvents", "showTaskCheckboxes", "showProjectIcons", "weatherEnabled"] as const;
 type DeviceViewSettingKey = typeof DEVICE_VIEW_SETTINGS_KEYS[number];
 
+// Settings that save to DB (cross-device default) AND to cookie (device override wins on load)
+const DEVICE_ALSO_COOKIE_KEYS = ["viewStyle", "showTimeGrid", "startDayOffset"];
+
 function getCookie(name: string): string | null {
     if (typeof document === "undefined") return null;
     const match = document.cookie.match(new RegExp(`(?:^|; )${name}=([^;]*)`));
@@ -999,7 +1002,10 @@ export default function WeeklyView() {
     };
     const [cellDuration, setCellDuration] = useState<CellDuration>(30);
     const [draggedTask, setDraggedTask] = useState<Task | null>(null);
-    const [showTimeGrid, setShowTimeGrid] = useState(true);
+    const [showTimeGrid, setShowTimeGrid] = useState<boolean>(() => {
+        const c = getCookie("setting_showTimeGrid");
+        return c !== null ? c === "true" : true;
+    });
     const [slideDirection, setSlideDirection] = useState<"next" | "prev" | null>(
         null,
     );
@@ -1018,7 +1024,10 @@ export default function WeeklyView() {
         listId?: string;
         slotIdx?: number;
     } | null>(null);
-    const [viewStyle, setViewStyle] = useState<ViewStyle>("simple");
+    const [viewStyle, setViewStyle] = useState<ViewStyle>(() => {
+        const c = getCookie("setting_viewStyle");
+        return (c as ViewStyle) || "simple";
+    });
 
     // Per-view settings: overrides that apply only to a specific view
     type PerViewOverrides = {
@@ -1407,6 +1416,12 @@ export default function WeeklyView() {
                     if (_cStart) setStartHour(Number(_cStart));
                     const _cEnd = getCookie("setting_endHour");
                     if (_cEnd) setEndHour(Number(_cEnd));
+                    const _cVS = getCookie("setting_viewStyle");
+                    if (_cVS) { setViewStyle(_cVS as ViewStyle); setProfile((p: any) => ({ ...p, viewStyle: _cVS })); }
+                    const _cTG = getCookie("setting_showTimeGrid");
+                    if (_cTG !== null) { const v = _cTG === "true"; setShowTimeGrid(v); setProfile((p: any) => ({ ...p, showTimeGrid: v })); }
+                    const _cSDO = getCookie("setting_startDayOffset");
+                    if (_cSDO !== null) setProfile((p: any) => ({ ...p, startDayOffset: Number(_cSDO) }));
 
                     // Show onboarding wizard for new users
                     if (profileData.hasCompletedOnboarding === false) {
@@ -2271,6 +2286,10 @@ export default function WeeklyView() {
             setCookie(`setting_${key}`, String(value));
             return; // Don't write to DB — that would overwrite other devices
         }
+        // Also persist to device cookie so this device remembers its own preference on reload
+        if (DEVICE_ALSO_COOKIE_KEYS.includes(key)) {
+            setCookie(`setting_${key}`, String(value));
+        }
         // Keep profile object in sync so the debounced auto-save never sends stale values
         setProfile((p: any) => ({ ...p, [key]: value }));
         try {
@@ -2499,6 +2518,21 @@ export default function WeeklyView() {
                         setCellDuration(data.user.cellDuration as CellDuration);
                     if (data.user.viewStyle)
                         setViewStyle(data.user.viewStyle as ViewStyle);
+
+                    // Cookie overrides for settings that are also device-local
+                    const _cVS2 = getCookie("setting_viewStyle");
+                    if (_cVS2) { setViewStyle(_cVS2 as ViewStyle); setProfile((p: any) => ({ ...p, viewStyle: _cVS2, showTimeGrid: _cVS2 === "simple" || _cVS2 === "calendar" })); }
+                    const _cTG2 = getCookie("setting_showTimeGrid");
+                    if (_cTG2 !== null) setShowTimeGrid(_cTG2 === "true");
+                    const _cSDO2 = getCookie("setting_startDayOffset");
+                    if (_cSDO2 !== null) {
+                        const offset = Number(_cSDO2);
+                        setProfile((p: any) => ({ ...p, startDayOffset: offset }));
+                        if (offset !== 0) {
+                            const d = new Date(); d.setHours(0, 0, 0, 0); d.setDate(d.getDate() + offset);
+                            setCurrentWeekStart(d);
+                        }
+                    }
                 }
             }
         } catch (e) {