diff --git a/src/components/TranslationView.vue b/src/components/TranslationView.vue
index 1f37658..830c57c 100644
--- a/src/components/TranslationView.vue
+++ b/src/components/TranslationView.vue
@@ -1,10 +1,12 @@
 <script setup lang="ts">
 import { ref, computed, onMounted, onUnmounted } from 'vue';
+import { storeToRefs } from 'pinia';
 import { ChevronDown, Check, ArrowRightLeft, Trash2, FileText, Plus, Loader2, Send, User, Type, Copy, Save } from 'lucide-vue-next';
 import { listen } from '@tauri-apps/api/event';
 import { useSettingsStore, LANGUAGES, SPEAKER_IDENTITY_OPTIONS, TONE_REGISTER_OPTIONS } from '../stores/settings';
 import { useHistoryStore } from '../stores/history';
 import { useLogsStore } from '../stores/logs';
+import { useTranslationWorkspaceStore } from '../stores/translation-workspace';
 import { cn } from '../lib/utils';
 import { useClipboard } from '../composables/useClipboard';
 import {
@@ -12,7 +14,6 @@ import {
   extractAssistantContent,
   resolveModelConfig,
   tryParseEvaluationResult,
-  type EvaluationResult,
   type TranslationChunkEvent,
   type TranslationPayload,
 } from '../lib/translation-service';
@@ -20,7 +21,21 @@ import {
 const settings = useSettingsStore();
 const historyStore = useHistoryStore();
 const logsStore = useLogsStore();
+const workspaceStore = useTranslationWorkspaceStore();
 const { activeCopyId, copyWithFeedback } = useClipboard();
+const {
+  sourceText,
+  context,
+  targetText,
+  isTranslating,
+  currentHistoryId,
+  evaluationResult,
+  isEvaluating,
+  isRefining,
+  selectedSuggestionIds,
+  appliedSuggestionIds,
+  activeStreamRequestId,
+} = storeToRefs(workspaceStore);
 
 const sourceDropdownOpen = ref(false);
 const targetDropdownOpen = ref(false);
@@ -57,26 +72,6 @@ const handleGlobalClick = (e: MouseEvent) => {
 onMounted(() => window.addEventListener('click', handleGlobalClick));
 onUnmounted(() => window.removeEventListener('click', handleGlobalClick));
 
-const sourceText = ref('');
-const context = ref('');
-const targetText = ref('');
-const isTranslating = ref(false);
-const currentHistoryId = ref<string | null>(null);
-
-const evaluationResult = ref<EvaluationResult | null>(null);
-const isEvaluating = ref(false);
-const isRefining = ref(false);
-const selectedSuggestionIds = ref<number[]>([]);
-const appliedSuggestionIds = ref<number[]>([]);
-const activeStreamRequestId = ref<string | null>(null);
-
-const toggleSuggestion = (id: number) => {
-  if (!selectedSuggestionIds.value) selectedSuggestionIds.value = [];
-  const index = selectedSuggestionIds.value.indexOf(id);
-  if (index > -1) selectedSuggestionIds.value.splice(index, 1);
-  else selectedSuggestionIds.value.push(id);
-};
-
 let unlisten: (() => void) | null = null;
 onMounted(async () => {
   unlisten = await listen<TranslationChunkEvent>('translation-chunk', (event) => {
@@ -110,17 +105,17 @@ const swapLanguages = () => {
 };
 
 const clearSource = () => {
-  sourceText.value = '';
-  targetText.value = '';
-  evaluationResult.value = null;
+  workspaceStore.clearWorkspace();
+};
+
+const toggleSuggestion = (id: number) => {
+  workspaceStore.toggleSuggestion(id);
 };
 
 const evaluateTranslation = async () => {
   if (!targetText.value) return;
   isEvaluating.value = true;
-  evaluationResult.value = null;
-  selectedSuggestionIds.value = [];
-  appliedSuggestionIds.value = [];
+  workspaceStore.resetEvaluationState();
 
   const modelConfig = resolveModelConfig({
     apiBaseUrl: settings.apiBaseUrl,
diff --git a/src/stores/translation-workspace.ts b/src/stores/translation-workspace.ts
new file mode 100644
index 0000000..54e73e0
--- /dev/null
+++ b/src/stores/translation-workspace.ts
@@ -0,0 +1,53 @@
+import { ref } from 'vue';
+import { defineStore } from 'pinia';
+import type { EvaluationResult } from '../lib/translation-service';
+
+export const useTranslationWorkspaceStore = defineStore('translationWorkspace', () => {
+  const sourceText = ref('');
+  const context = ref('');
+  const targetText = ref('');
+  const isTranslating = ref(false);
+  const currentHistoryId = ref<string | null>(null);
+
+  const evaluationResult = ref<EvaluationResult | null>(null);
+  const isEvaluating = ref(false);
+  const isRefining = ref(false);
+  const selectedSuggestionIds = ref<number[]>([]);
+  const appliedSuggestionIds = ref<number[]>([]);
+  const activeStreamRequestId = ref<string | null>(null);
+
+  const resetEvaluationState = () => {
+    evaluationResult.value = null;
+    selectedSuggestionIds.value = [];
+    appliedSuggestionIds.value = [];
+  };
+
+  const clearWorkspace = () => {
+    sourceText.value = '';
+    targetText.value = '';
+    resetEvaluationState();
+  };
+
+  const toggleSuggestion = (id: number) => {
+    const index = selectedSuggestionIds.value.indexOf(id);
+    if (index > -1) selectedSuggestionIds.value.splice(index, 1);
+    else selectedSuggestionIds.value.push(id);
+  };
+
+  return {
+    sourceText,
+    context,
+    targetText,
+    isTranslating,
+    currentHistoryId,
+    evaluationResult,
+    isEvaluating,
+    isRefining,
+    selectedSuggestionIds,
+    appliedSuggestionIds,
+    activeStreamRequestId,
+    resetEvaluationState,
+    clearWorkspace,
+    toggleSuggestion,
+  };
+});