feat: improve chat keyboard handling and MonthSelector memory efficiency

- Add KeyboardAvoidingView with platform-specific behavior to chat screen
- Implement auto-scroll to end on new messages and keyboard show
- Configure keyboardDismissMode and keyboardShouldPersistTaps for better UX
- Lazy-load MonthSelector data only when modal opens, clear on close
- Add .env to gitignore

.gitignore

@@ -2,3 +2,4 @@ node_modules
 *.tsbuildinfo
 docs/praesi_2_context.md
 docs/*.png
+.env

CLAUDE.md

@@ -296,7 +296,7 @@ MONGODB_URI=mongodb://root:mongoose@localhost:27017/calchat?authSource=admin
 - Tab navigation (Chat, Calendar) implemented with basic UI
 - Calendar screen fully functional:
   - Month navigation with grid display and Ionicons (chevron-back/forward)
-  - MonthSelector dropdown with infinite scroll (dynamically loads months)
+  - MonthSelector dropdown with infinite scroll (dynamically loads months, lazy-loaded when modal opens, cleared on close for memory efficiency)
   - Events loaded from API via EventService.getByDateRange()
   - Orange dot indicator for days with events
   - Tap-to-open modal overlay showing EventCards for selected day
@@ -304,6 +304,9 @@ MONGODB_URI=mongodb://root:mongoose@localhost:27017/calchat?authSource=admin
   - Uses `useFocusEffect` for automatic reload on tab focus
 - Chat screen functional with FlashList, message sending, and event confirm/reject
   - Messages persisted via ChatStore (survives tab switches)
+  - KeyboardAvoidingView for proper keyboard handling (iOS padding, Android height)
+  - Auto-scroll to end on new messages and keyboard show
+  - keyboardDismissMode="interactive" and keyboardShouldPersistTaps="handled"
 - `ApiClient`: get(), post(), put(), delete() implemented
 - `EventService`: getAll(), getById(), getByDateRange(), create(), update(), delete() - fully implemented
 - `ChatService`: sendMessage(), confirmEvent(convId, msgId, action, event?, eventId?, updates?), rejectEvent() - supports create/update/delete actions

apps/client/src/app/(tabs)/calendar.tsx

@@ -323,16 +323,7 @@ const MonthSelector = ({
   const listRef = useRef<React.ComponentRef<typeof FlashList<MonthItem>>>(null);
   const INITIAL_RANGE = 12; // 12 months before and after current
 
-  const [monthSelectorData, setMonthSelectorData] = useState<MonthItem[]>(() =>
+  const [monthSelectorData, setMonthSelectorData] = useState<MonthItem[]>([]);
-    generateMonths(currentYear, currentMonthIndex, INITIAL_RANGE),
-  );
-
-  // Reset data when current month changes
-  useEffect(() => {
-    setMonthSelectorData(
-      generateMonths(currentYear, currentMonthIndex, INITIAL_RANGE),
-    );
-  }, [currentYear, currentMonthIndex]);
 
   const appendMonths = (direction: "start" | "end", count: number) => {
     setMonthSelectorData((prevData) => {
@@ -378,6 +369,10 @@ const MonthSelector = ({
 
   useEffect(() => {
     if (modalVisible) {
+      // Generate fresh data centered on current month
+      setMonthSelectorData(
+        generateMonths(currentYear, currentMonthIndex, INITIAL_RANGE),
+      );
       Animated.timing(heightAnim, {
         toValue: 200,
         duration: 200,
@@ -385,8 +380,10 @@ const MonthSelector = ({
       }).start();
     } else {
       heightAnim.setValue(0);
+      // Clear data when closing
+      setMonthSelectorData([]);
     }
-  }, [modalVisible, heightAnim]);
+  }, [modalVisible, heightAnim, currentYear, currentMonthIndex]);
 
   const renderItem = ({ item }: { item: MonthItem }) => (
     <Pressable

apps/client/src/app/(tabs)/chat.tsx

@@ -1,6 +1,6 @@
-import { View, Text, TextInput, Pressable } from "react-native";
+import { View, Text, TextInput, Pressable, KeyboardAvoidingView, Platform, Keyboard } from "react-native";
 import currentTheme from "../../Themes";
-import { useState } from "react";
+import { useState, useRef, useEffect } from "react";
 import Header from "../../components/Header";
 import BaseBackground from "../../components/BaseBackground";
 import { FlashList } from "@shopify/flash-list";
@@ -31,6 +31,18 @@ type ChatInputProps = {
 
 const Chat = () => {
   const { messages, addMessage, updateMessage } = useChatStore();
+  const listRef = useRef<FlashList<MessageData>>(null);
+
+  useEffect(() => {
+    const keyboardDidShow = Keyboard.addListener("keyboardDidShow", scrollToEnd);
+    return () => keyboardDidShow.remove();
+  }, []);
+
+  const scrollToEnd = () => {
+    setTimeout(() => {
+      listRef.current?.scrollToEnd({ animated: true });
+    }, 100);
+  };
 
   const handleEventResponse = async (
     action: "confirm" | "reject",
@@ -61,6 +73,7 @@ const Chat = () => {
         conversationId: response.conversationId,
       };
       addMessage(botMessage);
+      scrollToEnd();
     } catch (error) {
       console.error(`Failed to ${action} event:`, error);
       // Revert on error
@@ -76,6 +89,7 @@ const Chat = () => {
       content: text,
     };
     addMessage(userMessage);
+    scrollToEnd();
 
     try {
       // Fetch server response
@@ -90,6 +104,7 @@ const Chat = () => {
         conversationId: response.conversationId,
       };
       addMessage(botMessage);
+      scrollToEnd();
     } catch (error) {
       console.error("Failed to send message:", error);
     }
@@ -98,7 +113,12 @@ const Chat = () => {
   return (
     <BaseBackground>
       <ChatHeader />
+      <KeyboardAvoidingView
+        behavior={Platform.OS === "ios" ? "padding" : "height"}
+        style={{ flex: 1 }}
+      >
         <FlashList
+          ref={listRef}
           data={messages}
           renderItem={({ item }) => (
             <ChatMessage
@@ -120,8 +140,11 @@ const Chat = () => {
             />
           )}
           keyExtractor={(item) => item.id}
+          keyboardDismissMode="interactive"
+          keyboardShouldPersistTaps="handled"
         />
         <ChatInput onSend={handleSend} />
+      </KeyboardAvoidingView>
     </BaseBackground>
   );
 };