chore: update .gitignore and remove quick insert options from button configurations

- Added new entries to .gitignore for multi-agent MCP task queue and related rules.
- Removed "즉시 저장" (quick insert) options from the ScreenSettingModal and BasicTab components to streamline button configurations.
- Cleaned up unused event options in the V2ButtonConfigPanel to enhance clarity and maintainability.

These changes aim to improve project organization and simplify the user interface by eliminating redundant options.

frontend/lib/registry/components/v2-timeline-scheduler/TimelineSchedulerComponent.tsx

@@ -227,7 +227,7 @@ export function TimelineSchedulerComponent({
       if (onCellClick) {
         onCellClick({
           resourceId,
-          date: date.toISOString().split("T")[0],
+          date: `${date.getFullYear()}-${String(date.getMonth() + 1).padStart(2, "0")}-${String(date.getDate()).padStart(2, "0")}`,
         });
       }
     },
@@ -343,7 +343,7 @@ export function TimelineSchedulerComponent({
     if (onAddSchedule && effectiveResources.length > 0) {
       onAddSchedule(
         effectiveResources[0].id,
-        new Date().toISOString().split("T")[0]
+        (() => { const _n = new Date(); return `${_n.getFullYear()}-${String(_n.getMonth() + 1).padStart(2, "0")}-${String(_n.getDate()).padStart(2, "0")}`; })()
       );
     }
   }, [onAddSchedule, effectiveResources]);
@@ -383,7 +383,8 @@ export function TimelineSchedulerComponent({
       const items = Array.from(grouped.entries()).map(([code, rows]) => {
         const totalQty = rows.reduce((sum: number, r: any) => sum + (Number(r[qtyField]) || 0), 0);
         const dates = rows.map((r: any) => r[dateField]).filter(Boolean).sort();
-        const earliestDate = dates[0] || new Date().toISOString().split("T")[0];
+        const _dn = new Date();
+        const earliestDate = dates[0] || `${_dn.getFullYear()}-${String(_dn.getMonth() + 1).padStart(2, "0")}-${String(_dn.getDate()).padStart(2, "0")}`;
         const first = rows[0];
         return {
           item_code: code,