implement calendar event display with day indicators and overlay

- Add ExpandedEvent type to shared package for recurring event instances
- Implement EventController and EventService with full CRUD operations
- Server-side recurring event expansion via recurrenceExpander
- Calendar grid shows orange dot indicator for days with events
- Tap on day opens modal overlay with EventCards
- EventCard component with Feather icons (calendar, clock, repeat, edit, trash)
- EventsStore with Zustand for client-side event state management
- Load events for visible grid range including adjacent month days
- Add textPrimary, borderPrimary, eventIndicator to theme
- Update test responses for multiple events on Saturdays

apps/server/src/services/ChatService.ts

@@ -16,7 +16,7 @@ import { getWeeksOverview, getMonthOverview } from "../utils/eventFormatters";
 type TestResponse = { content: string; proposedChange?: ProposedEventChange };
 
 // Test response index (cycles through responses)
-let responseIndex = 8;
+let responseIndex = 0;
 
 // Static test responses (event proposals)
 const staticResponses: TestResponse[] = [
@@ -109,7 +109,7 @@ const staticResponses: TestResponse[] = [
       '• "Verschiebe das Meeting auf Donnerstag"\n\n' +
       "Wie kann ich dir helfen?",
   },
-  // Response 9: Phone call - short appointment
+  // Response 9: Phone call - short appointment (Wednesday, so +2 days = Friday)
   {
     content:
       "Alles klar! Ich habe das Telefonat mit deiner Mutter eingetragen:",
@@ -117,12 +117,12 @@ const staticResponses: TestResponse[] = [
       action: "create",
       event: {
         title: "Telefonat mit Mama",
-        startTime: getDay("Sunday", 0, 11, 0),
-        endTime: getDay("Sunday", 0, 11, 30),
+        startTime: getDay("Wednesday", 1, 11, 0),
+        endTime: getDay("Wednesday", 1, 11, 30),
       },
     },
   },
-  // Response 10: Update "Telefonat mit Mama" +2 days (DYNAMIC - placeholder)
+  // Response 10: Update "Telefonat mit Mama" +3 days (DYNAMIC - placeholder)
   { content: "" },
   // Response 11: Birthday party - evening event
   {
@@ -137,10 +137,10 @@ const staticResponses: TestResponse[] = [
       },
     },
   },
-  // Response 12: Language course - limited to 8 weeks
+  // Response 12: Language course - limited to 8 weeks (Thu + Sat)
   {
     content:
-      "Dein Spanischkurs ist eingetragen! Er läuft jeden Donnerstag für die nächsten 8 Wochen:",
+      "Dein Spanischkurs ist eingetragen! Er läuft jeden Donnerstag und Samstag für die nächsten 8 Wochen:",
     proposedChange: {
       action: "create",
       event: {
@@ -148,7 +148,7 @@ const staticResponses: TestResponse[] = [
         startTime: getDay("Thursday", 1, 19, 0),
         endTime: getDay("Thursday", 1, 20, 30),
         isRecurring: true,
-        recurrenceRule: "FREQ=WEEKLY;BYDAY=TH;COUNT=8",
+        recurrenceRule: "FREQ=WEEKLY;BYDAY=TH,SA;COUNT=8",
       },
     },
   },
@@ -191,17 +191,18 @@ async function getTestResponse(
   }
 
   if (responseIdx === 10) {
-    // Update "Telefonat mit Mama" +2 days
+    // Update "Telefonat mit Mama" +3 days and change time to 13:00
     const events = await eventRepo.findByUserId(userId);
     const mamaEvent = events.find((e) => e.title === "Telefonat mit Mama");
     if (mamaEvent) {
       const newStart = new Date(mamaEvent.startTime);
-      newStart.setDate(newStart.getDate() + 2);
-      const newEnd = new Date(mamaEvent.endTime);
-      newEnd.setDate(newEnd.getDate() + 2);
+      newStart.setDate(newStart.getDate() + 3);
+      newStart.setHours(13, 0, 0, 0);
+      const newEnd = new Date(newStart);
+      newEnd.setMinutes(30);
       return {
         content:
-          "Alles klar, ich verschiebe das Telefonat mit Mama um 2 Tage nach hinten:",
+          "Alles klar, ich verschiebe das Telefonat mit Mama auf Samstag um 13:00 Uhr:",
         proposedChange: {
           action: "update",
           eventId: mamaEvent.id,