fix: premjesti kalendar widget u Layout, popravi PDF toast i Servisi danas

- TaskCalendarPortal u Layout.astro (van AnimatedPage transforma) pa fixed
  pozicija uvijek prati viewport rub bez probijanja sadržaja
- Kalendar widgeta panel koristi clipping wrapper (overflow:hidden + animirana
  width) umjesto translate3d — potpuno skriva sjenu i border kad je zatvoren
- Serviser vidi samo svoje taskove, supervisor vidi sve; neprijavljeni korisnik
  ne vidi widget (return null)
- FleetDashboardShell sluša calendar:open-task event i otvara TaskServiceRecordsModal
- Servisi danas broji Taskove (scheduled_date=danas, status aktivan/servis)
  umjesto Servisnih zapisa
- downloadGeneratedPdfByUrl hvata grešku i prikazuje Toast (npr. PDF nije
  dostupan ili je istekao)

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

frontend/src/components/dashboard/TaskCalendarWidget.jsx

@@ -27,7 +27,7 @@ export default function TaskCalendarWidget({ tasks = [], onTaskClick }) {
     const [selectedDay, setSelectedDay] = useState(null);
 
     const panelSpring = useSpring({
-        transform: open ? 'translate3d(0%,0,0)' : `translate3d(-100%,0,0)`,
+        left: open ? 0 : -PANEL_WIDTH,
         config: { tension: 260, friction: 28 },
     });
 
@@ -99,11 +99,19 @@ export default function TaskCalendarWidget({ tasks = [], onTaskClick }) {
                 />
             )}
 
-            {/* Sliding panel */}
+            {/* Clipping wrapper — animates width 0→300, clips shadow+border completely */}
             <animated.div
-                style={{ ...panelSpring, width: `${PANEL_WIDTH}px` }}
-                className="fixed left-0 top-0 z-[46] flex h-screen flex-col overflow-hidden border-r border-border-hairline bg-canvas-elevated shadow-2xl"
+                style={{
+                    width: panelSpring.left.to((v) => `${Math.max(0, v + PANEL_WIDTH)}px`),
+                    pointerEvents: open ? 'auto' : 'none',
+                }}
+                className="fixed left-0 top-0 z-[46] h-screen overflow-hidden"
             >
+                {/* Inner panel — always 300px, anchored to right edge of wrapper */}
+                <div
+                    style={{ width: `${PANEL_WIDTH}px` }}
+                    className="absolute right-0 top-0 flex h-full flex-col border-r border-border-hairline bg-canvas-elevated shadow-2xl"
+                >
                 {/* Header */}
                 <div className="flex items-center justify-between border-b border-border-hairline px-4 py-3">
                     <h2 className="text-sm font-semibold text-text-main">📅 Kalendar zadataka</h2>
@@ -244,6 +252,7 @@ export default function TaskCalendarWidget({ tasks = [], onTaskClick }) {
                         </>
                     )}
                 </div>
+                </div>
             </animated.div>
 
             {/* Toggle tab button — slides right as panel opens */}