feat(i18n): extract remaining screens into en/zh-Hans catalogs; full Simplified Chinese coverage (closes #68) (#103)

Extends the i18n infra from #97 (Settings screen only) to the rest of the
app: session chat screen, connection add/edit/list screens, sessions list
(incl. directory grouping from #96), navigation titles, notifications
category metadata, error boundary, telemetry consent modal, auth gate, and
every chat UI component (permission/question prompts, status indicator,
model/variant pickers, directory switcher/browser, reasoning block, tool
call card, session info).

- 244 new keys added to en.json/zh-Hans.json with reviewed, natural
  Simplified Chinese (not machine-garbage), keeping key sets identical.
- User content, server URLs, code snippets, log/error-detail text, and
  diagnostics-classify.ts (pure dependency-free module feeding Sentry/
  support reports) are intentionally left untranslated per scope.
- Interpolation used for counts/names (e.g. reconnect attempt, files
  count, connection name in delete confirmations); categoryMeta/
  CONNECTION_TYPES switched to labelKey indirection since they're
  module-level constants evaluated before i18next is guaranteed ready.
- Added src/lib/i18n/catalog-parity.test.ts (node --test) asserting
  en.json/zh-Hans.json expose identical key sets and no empty values,
  to catch future locale drift.

Co-authored-by: Claude Fable 5 <noreply@anthropic.com>

src/components/chat/QuestionPrompt.tsx

@@ -1,6 +1,7 @@
 import { useState } from "react"
 import { View, Text, TextInput, TouchableOpacity, StyleSheet } from "react-native"
 import { Ionicons } from "@expo/vector-icons"
+import { useTranslation } from "react-i18next"
 
 interface QuestionOption {
   label: string
@@ -26,6 +27,7 @@ interface Props {
 }
 
 export function QuestionPrompt({ request, isDark, onReply, onReject }: Props) {
+  const { t } = useTranslation()
   const [answers, setAnswers] = useState<string[][]>(request.questions.map(() => []))
   const [custom, setCustom] = useState("")
   const [showCustom, setShowCustom] = useState(false)
@@ -66,7 +68,7 @@ export function QuestionPrompt({ request, isDark, onReply, onReject }: Props) {
     <View style={[s.card, isDark && s.cardDark]}>
       <View style={s.header}>
         <Ionicons name="chatbubble-ellipses-outline" size={18} color="#8b5cf6" />
-        <Text style={[s.title, isDark && s.textWhite]}>{q.header || "Question"}</Text>
+        <Text style={[s.title, isDark && s.textWhite]}>{q.header || t("chat.questionPrompt.headerFallback")}</Text>
       </View>
       <Text style={[s.question, isDark && s.textWhite]}>{q.question}</Text>
 
@@ -95,7 +97,7 @@ export function QuestionPrompt({ request, isDark, onReply, onReject }: Props) {
             <View style={s.customRow}>
               <TextInput
                 style={[s.customInput, isDark && s.customInputDark]}
-                placeholder="Type your answer..."
+                placeholder={t("chat.questionPrompt.answerPlaceholder")}
                 placeholderTextColor={isDark ? "#666666" : "#999999"}
                 value={custom}
                 onChangeText={setCustom}
@@ -108,14 +110,14 @@ export function QuestionPrompt({ request, isDark, onReply, onReject }: Props) {
             </View>
           ) : (
             <TouchableOpacity style={[s.option, isDark && s.optionDark]} onPress={() => setShowCustom(true)}>
-              <Text style={[s.optionLabel, { color: "#8b5cf6" }]}>Type your own answer</Text>
+              <Text style={[s.optionLabel, { color: "#8b5cf6" }]}>{t("chat.questionPrompt.customAnswerLabel")}</Text>
             </TouchableOpacity>
           ))}
       </View>
 
       <View style={s.footer}>
         <TouchableOpacity onPress={onReject}>
-          <Text style={[s.dismiss, isDark && s.metaDark]}>Dismiss</Text>
+          <Text style={[s.dismiss, isDark && s.metaDark]}>{t("chat.questionPrompt.dismiss")}</Text>
         </TouchableOpacity>
         {(request.questions.length > 1 || q.multiple) && (
           <TouchableOpacity
@@ -128,7 +130,9 @@ export function QuestionPrompt({ request, isDark, onReply, onReject }: Props) {
               }
             }}
           >
-            <Text style={s.submitText}>{current < request.questions.length - 1 ? "Next" : "Submit"}</Text>
+            <Text style={s.submitText}>
+              {current < request.questions.length - 1 ? t("chat.questionPrompt.next") : t("chat.questionPrompt.submit")}
+            </Text>
           </TouchableOpacity>
         )}
       </View>