diff --git a/frontend/src/components/WorkspaceChatWidget.vue b/frontend/src/components/WorkspaceChatWidget.vue
index 54437007..618ab2f3 100644
--- a/frontend/src/components/WorkspaceChatWidget.vue
+++ b/frontend/src/components/WorkspaceChatWidget.vue
@@ -1,5 +1,5 @@
 <script setup lang="ts">
-import { ref, nextTick, onMounted, onUnmounted, watch } from 'vue';
+import { ref, computed, nextTick, onMounted, onUnmounted, watch } from 'vue';
 import { useChatStore } from '@/stores/chat';
 import ChatPanel from '@/components/ChatPanel.vue';
 import ChatInputBar from '@/components/ChatInputBar.vue';
@@ -55,9 +55,36 @@ const widgetState = ref<WidgetState>('collapsed');
 const chatPanelRef = ref<InstanceType<typeof ChatPanel> | null>(null);
 const inputBarRef = ref<InstanceType<typeof ChatInputBar> | null>(null);
 
-let workspaceConvId: number | null = null;
+const workspaceConvId = ref<number | null>(null);
 let isNewConv = false;
 
+const historyOpen = ref(false);
+
+const projectConversations = computed(() =>
+  chatStore.conversations
+    .filter((c) => c.rag_project_id === props.projectId)
+    .slice()
+    .sort((a, b) => (b.updated_at || '').localeCompare(a.updated_at || ''))
+);
+
+async function pickConversation(convId: number) {
+  historyOpen.value = false;
+  if (convId === workspaceConvId.value) return;
+  await chatStore.fetchConversation(convId);
+  workspaceConvId.value = convId;
+  // The picked conversation already exists on the server; not ours to clean up.
+  isNewConv = false;
+  localStorage.setItem(_storageKey(props.projectId), String(convId));
+}
+
+function toggleHistory() {
+  historyOpen.value = !historyOpen.value;
+}
+
+function conversationLabel(c: { id: number; title?: string | null }): string {
+  return (c.title && c.title.trim()) || `Conversation #${c.id}`;
+}
+
 function _storageKey(pid: number) {
   return `workspace_conv_${pid}`;
 }
@@ -75,7 +102,7 @@ function close() { widgetState.value = 'closed'; }
 
 async function restart() {
   const conv = await chatStore.createConversation();
-  workspaceConvId = conv.id;
+  workspaceConvId.value = conv.id;
   isNewConv = true;
   localStorage.setItem(_storageKey(props.projectId), String(conv.id));
   await chatStore.fetchConversation(conv.id);
@@ -96,6 +123,10 @@ function prefill(text: string) {
 }
 
 onMounted(async () => {
+  if (chatStore.conversations.length === 0) {
+    await chatStore.fetchConversations();
+  }
+
   const key = _storageKey(props.projectId);
   const storedId = localStorage.getItem(key);
 
@@ -103,7 +134,7 @@ onMounted(async () => {
     const existingId = Number(storedId);
     try {
       await chatStore.fetchConversation(existingId);
-      workspaceConvId = existingId;
+      workspaceConvId.value = existingId;
       isNewConv = false;
       chatStore.reconnectIfGenerating(existingId);
     } catch {
@@ -111,9 +142,9 @@ onMounted(async () => {
     }
   }
 
-  if (workspaceConvId === null) {
+  if (workspaceConvId.value === null) {
     const conv = await chatStore.createConversation();
-    workspaceConvId = conv.id;
+    workspaceConvId.value = conv.id;
     isNewConv = true;
     await chatStore.fetchConversation(conv.id);
     localStorage.setItem(key, String(conv.id));
@@ -121,10 +152,11 @@ onMounted(async () => {
 });
 
 onUnmounted(async () => {
-  if (workspaceConvId !== null && isNewConv) {
-    const conv = chatStore.conversations.find((c) => c.id === workspaceConvId);
+  if (workspaceConvId.value !== null && isNewConv) {
+    const id = workspaceConvId.value;
+    const conv = chatStore.conversations.find((c) => c.id === id);
     if (conv && conv.message_count === 0) {
-      await chatStore.deleteConversation(workspaceConvId);
+      await chatStore.deleteConversation(id);
       localStorage.removeItem(_storageKey(props.projectId));
     }
   }
@@ -154,7 +186,28 @@ defineExpose({ prefill });
     <div v-if="widgetState === 'expanded'" class="ws-chat-header">
       <span class="ws-chat-title">Project chat</span>
       <div class="ws-chat-header-actions">
-        <button class="btn-icon-sm" title="History" disabled>▾</button>
+        <div class="ws-chat-history-wrap">
+          <button
+            class="btn-icon-sm"
+            :class="{ active: historyOpen }"
+            title="History"
+            @click="toggleHistory"
+          >▾</button>
+          <div v-if="historyOpen" class="ws-chat-history-menu">
+            <div v-if="projectConversations.length === 0" class="ws-chat-history-empty">
+              No past conversations
+            </div>
+            <button
+              v-for="c in projectConversations"
+              :key="c.id"
+              class="ws-chat-history-item"
+              :class="{ current: c.id === workspaceConvId }"
+              @click="pickConversation(c.id)"
+            >
+              <span class="ws-chat-history-title">{{ conversationLabel(c) }}</span>
+            </button>
+          </div>
+        </div>
         <button class="btn-icon-sm" title="Restart conversation" @click="restart">↻</button>
         <button class="btn-icon-sm" title="Collapse" @click="collapse">
           <svg width="12" height="12" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2.5">
@@ -272,6 +325,61 @@ defineExpose({ prefill });
   opacity: 0.4;
   cursor: not-allowed;
 }
+.btn-icon-sm.active {
+  color: var(--color-primary);
+  background: color-mix(in srgb, var(--color-primary) 12%, transparent);
+}
+
+.ws-chat-history-wrap {
+  position: relative;
+}
+.ws-chat-history-menu {
+  position: absolute;
+  top: 100%;
+  right: 0;
+  margin-top: 4px;
+  min-width: 220px;
+  max-height: 260px;
+  overflow-y: auto;
+  background: var(--color-surface);
+  border: 1px solid var(--color-border);
+  border-radius: 8px;
+  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
+  z-index: 30;
+  padding: 4px;
+}
+.ws-chat-history-empty {
+  padding: 10px 12px;
+  font-size: 0.82rem;
+  color: var(--color-text-muted);
+  text-align: center;
+}
+.ws-chat-history-item {
+  display: block;
+  width: 100%;
+  text-align: left;
+  background: none;
+  border: none;
+  padding: 8px 10px;
+  border-radius: 6px;
+  color: var(--color-text);
+  font-size: 0.85rem;
+  cursor: pointer;
+  font-family: inherit;
+}
+.ws-chat-history-item:hover {
+  background: color-mix(in srgb, var(--color-primary) 10%, transparent);
+}
+.ws-chat-history-item.current {
+  color: var(--color-primary);
+  font-weight: 600;
+}
+.ws-chat-history-title {
+  display: block;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
 
 .ws-chat-body {
   flex: 1;