fix(ai): add inline proposal confirmation buttons

* fix(ai): add quick proposal confirmation buttons (all locales)

When the assistant proposes an action, render Yes/No buttons below the
message so the user does not need to type a short reply — fixing the
issue where short replies caused the LLM to re-ask instead of executing.

- aiProposalDetect.ts: pure detectors for proposal sentences/short replies
- AiAssistant.vue: inline Yes/No buttons on last assistant proposal message
- ai.ts: system-prompt rule to skip re-confirmation on short affirmatives
- i18n: 3 keys added to all 7 locales (en/zh-CN/zh-TW/ja/es/it/pt-BR)

Tests: 55/55. TypeCheck: passed.

* fix(ai): add i18n keys and UI changes for proposal confirmation

apps/desktop/src/components/editor/AiAssistant.vue

@@ -35,6 +35,7 @@ import { parseExplainResult, type ParsedExplainPlan } from "@/lib/explainPlan";
 import { copyToClipboard } from "@/lib/clipboard";
 import { formatAiTableMention, parseAiTableMentions, type AiTableMention } from "@/lib/aiTableMentions";
 import { isAiPromptImeCompositionEvent, shouldSubmitAiPromptOnKeydown } from "@/lib/aiPromptKeyboard";
+import { looksLikeActionProposal, containsChinese } from "@/lib/aiProposalDetect";
 
 const { t } = useI18n();
 const settings = useSettingsStore();
@@ -221,6 +222,37 @@ const isWaitingForFirstDelta = computed(() => {
   return isGenerating.value && last?.role === "assistant" && !last.content && !last.reasoning;
 });
 
+/**
+ * The last assistant message whose final line looks like an action
+ * proposal question. Used to render an inline "Yes / No" confirmation bar
+ * so the user can answer without typing. `null` while the assistant is
+ * still generating or when no such message exists.
+ */
+const proposalConfirmMessage = computed<ChatMessage | null>(() => {
+  if (isGenerating.value) return null;
+  for (let i = messages.value.length - 1; i >= 0; i--) {
+    const msg = messages.value[i];
+    if (msg.kind === "contextSummary") continue;
+    if (msg.role !== "assistant") return null;
+    if (!msg.content) return null;
+    return looksLikeActionProposal(msg.content) ? msg : null;
+  }
+  return null;
+});
+
+function sendProposalReply(positive: boolean) {
+  // Disable while a stream is in flight or no proposal is currently active.
+  if (isGenerating.value) return;
+  const target = proposalConfirmMessage.value;
+  if (!target) return;
+  const isZh = containsChinese(target.content || "");
+  const replyZh = positive ? "请执行上面你刚提议的操作，不要再反问确认。" : "不用执行上面提到的操作，继续当前对话。";
+  const replyEn = positive ? "Execute the action you just proposed above; do not ask for confirmation again." : "Do not execute the action mentioned above; continue the current conversation.";
+  prompt.value = isZh ? replyZh : replyEn;
+  // Use the existing send pipeline so the message is added to history, persisted, etc.
+  send();
+}
+
 const activePlaceholder = computed(() => `${t(`ai.placeholders.${activeAction.value}`)} ${t("ai.tableMentionPlaceholderHint")}`);
 const activeModeHint = computed(() => t(`ai.modeHints.${assistantMode.value}`));
 const assistantModeItems = computed(() => [
@@ -1106,6 +1138,16 @@ const messageRenderer = computed(() => {
                   <pre class="ai-code-block whitespace-pre-wrap break-words p-3 text-xs leading-relaxed text-zinc-900 dark:text-zinc-100"><code v-html="seg.html"></code></pre>
                 </div>
               </template>
+              <div v-if="msg === proposalConfirmMessage" class="mt-2 flex gap-2" :title="t('ai.proposalConfirmTitle')">
+                <Button size="sm" variant="default" class="h-7 gap-1 text-[11px]" @click="sendProposalReply(true)">
+                  <Check class="h-3 w-3" />
+                  {{ t("ai.proposalConfirmYes") }}
+                </Button>
+                <Button size="sm" variant="outline" class="h-7 gap-1 text-[11px]" @click="sendProposalReply(false)">
+                  <X class="h-3 w-3" />
+                  {{ t("ai.proposalConfirmNo") }}
+                </Button>
+              </div>
             </div>
           </div>
         </template>