Refactor socket handlers to improve performance and enhance thinking level management

apps/mobile/components/ModelSelector.tsx

@@ -3,13 +3,18 @@ import { useMemo, useState } from "react";
 import {
   ActivityIndicator,
   FlatList,
+  Keyboard,
+  KeyboardAvoidingView,
   Modal,
+  Platform,
   Pressable,
   StyleSheet,
   Text,
   TextInput,
+  useWindowDimensions,
   View,
 } from "react-native";
+import { useSafeAreaInsets } from "react-native-safe-area-context";
 import { colors, monoFont } from "@/lib/theme";
 import type { ModelRef, ModelSummary } from "@/lib/types";
 
@@ -39,6 +44,10 @@ export function ModelSelector({
 }: ModelSelectorProps) {
   const [open, setOpen] = useState(false);
   const [query, setQuery] = useState("");
+  const { height: windowHeight } = useWindowDimensions();
+  const insets = useSafeAreaInsets();
+  const sheetHeight = Math.round(windowHeight * 0.78);
+
   const filteredModels = useMemo(() => {
     const needle = query.trim().toLowerCase();
     if (!needle) {
@@ -55,6 +64,17 @@ export function ModelSelector({
     ? models.find((model) => model.provider === selected.provider && model.id === selected.id)
     : undefined;
 
+  const close = () => {
+    Keyboard.dismiss();
+    setQuery("");
+    setOpen(false);
+  };
+
+  const handleSelect = (model: ModelRef) => {
+    onSelect(model);
+    close();
+  };
+
   return (
     <>
       <Pressable
@@ -77,12 +97,24 @@ export function ModelSelector({
         )}
       </Pressable>
 
-      <Modal visible={open} animationType="slide" transparent onRequestClose={() => setOpen(false)}>
-        <View style={styles.overlay}>
-          <View style={styles.sheet}>
+      <Modal visible={open} animationType="slide" transparent onRequestClose={close}>
+        <KeyboardAvoidingView
+          style={styles.overlay}
+          behavior={Platform.OS === "ios" ? "padding" : "height"}
+        >
+          <Pressable style={styles.backdrop} onPress={close} accessibilityLabel="Close model selector" />
+          <View
+            style={[
+              styles.sheet,
+              {
+                height: sheetHeight,
+                paddingBottom: Math.max(insets.bottom, 16),
+              },
+            ]}
+          >
             <View style={styles.header}>
               <Text style={styles.title}>Choose model</Text>
-              <Pressable onPress={() => setOpen(false)} hitSlop={10}>
+              <Pressable onPress={close} hitSlop={10} accessibilityLabel="Close">
                 <Ionicons name="close" size={22} color={colors.textSecondary} />
               </Pressable>
             </View>
@@ -94,48 +126,53 @@ export function ModelSelector({
               style={styles.search}
               autoCorrect={false}
               autoCapitalize="none"
+              returnKeyType="search"
             />
             {error ? <Text style={styles.error}>{error}</Text> : null}
-            {models.length === 0 ? (
-              <Text style={styles.empty}>{loading ? "Loading models…" : "No available models"}</Text>
-            ) : (
-              <FlatList
-                data={filteredModels}
-                keyExtractor={(model) => `${model.provider}:${model.id}`}
-                keyboardShouldPersistTaps="handled"
-                renderItem={({ item }) => {
-                  const isSelected =
-                    item.provider === selected?.provider && item.id === selected?.id;
-                  return (
-                    <Pressable
-                      style={({ pressed }) => [
-                        styles.option,
-                        pressed && styles.pressed,
-                        isSelected && styles.selected,
-                      ]}
-                      onPress={() => {
-                        onSelect({ provider: item.provider, id: item.id });
-                        setOpen(false);
-                      }}
-                    >
-                      <View style={styles.optionText}>
-                        <Text style={styles.optionId}>{item.id}</Text>
-                        <Text style={styles.optionMeta}>
-                          {item.providerDisplayName ?? item.provider}
-                          {item.name && item.name !== item.id ? ` · ${item.name}` : ""}
-                        </Text>
-                      </View>
-                      {isSelected ? (
-                        <Ionicons name="checkmark" size={18} color={colors.accent} />
-                      ) : null}
-                    </Pressable>
-                  );
-                }}
-                ListEmptyComponent={<Text style={styles.empty}>No matching models</Text>}
-              />
-            )}
+            <View style={styles.listRegion}>
+              {models.length === 0 ? (
+                <Text style={styles.empty}>{loading ? "Loading models…" : "No available models"}</Text>
+              ) : (
+                <FlatList
+                  style={styles.list}
+                  data={filteredModels}
+                  keyExtractor={(model) => `${model.provider}:${model.id}`}
+                  keyboardShouldPersistTaps="handled"
+                  keyboardDismissMode="on-drag"
+                  contentContainerStyle={
+                    filteredModels.length === 0 ? styles.listEmptyContent : styles.listContent
+                  }
+                  renderItem={({ item }) => {
+                    const isSelected =
+                      item.provider === selected?.provider && item.id === selected?.id;
+                    return (
+                      <Pressable
+                        style={({ pressed }) => [
+                          styles.option,
+                          pressed && styles.pressed,
+                          isSelected && styles.selected,
+                        ]}
+                        onPress={() => handleSelect({ provider: item.provider, id: item.id })}
+                      >
+                        <View style={styles.optionText}>
+                          <Text style={styles.optionId}>{item.id}</Text>
+                          <Text style={styles.optionMeta}>
+                            {item.providerDisplayName ?? item.provider}
+                            {item.name && item.name !== item.id ? ` · ${item.name}` : ""}
+                          </Text>
+                        </View>
+                        {isSelected ? (
+                          <Ionicons name="checkmark" size={18} color={colors.accent} />
+                        ) : null}
+                      </Pressable>
+                    );
+                  }}
+                  ListEmptyComponent={<Text style={styles.empty}>No matching models</Text>}
+                />
+              )}
+            </View>
           </View>
-        </View>
+        </KeyboardAvoidingView>
       </Modal>
     </>
   );
@@ -160,14 +197,15 @@ const styles = StyleSheet.create({
   pressed: { backgroundColor: colors.surface },
   disabled: { opacity: 0.45 },
   overlay: { flex: 1, justifyContent: "flex-end", backgroundColor: "rgba(0, 0, 0, 0.65)" },
+  backdrop: { ...StyleSheet.absoluteFillObject },
   sheet: {
-    maxHeight: "78%",
     backgroundColor: colors.surface,
     borderTopLeftRadius: 16,
     borderTopRightRadius: 16,
     borderWidth: 1,
     borderColor: colors.border,
-    padding: 16,
+    paddingHorizontal: 16,
+    paddingTop: 16,
     gap: 12,
   },
   header: { flexDirection: "row", alignItems: "center", justifyContent: "space-between" },
@@ -183,6 +221,21 @@ const styles = StyleSheet.create({
     fontFamily: monoFont,
     fontSize: 13,
   },
+  listRegion: {
+    flex: 1,
+    minHeight: 0,
+  },
+  list: {
+    flex: 1,
+  },
+  listContent: {
+    paddingBottom: 8,
+  },
+  listEmptyContent: {
+    flexGrow: 1,
+    justifyContent: "flex-start",
+    paddingTop: 8,
+  },
   option: {
     flexDirection: "row",
     alignItems: "center",