feat: group sidebar sessions by project

public/app.js

@@ -1288,6 +1288,109 @@
     return sessions.filter((s) => normalizeAgent(s.agent) === currentAgent);
   }
 
+  function getSessionCwdFromCache(sessionId) {
+    if (!sessionId) return '';
+    const cachedCwd = sessionCache.get(sessionId)?.snapshot?.cwd;
+    if (cachedCwd) return cachedCwd;
+    if (sessionId === currentSessionId && currentCwd) return currentCwd;
+    return '';
+  }
+
+  function getSessionEffectiveCwd(session) {
+    return session?.cwd || getSessionCwdFromCache(session?.id) || '';
+  }
+
+  function getSessionProjectName(session) {
+    if (session?.projectName) return session.projectName;
+    const cwd = String(getSessionEffectiveCwd(session)).replace(/\\/g, '/').replace(/\/+$/, '');
+    return cwd ? (getPathLeaf(cwd) || cwd) : '';
+  }
+
+  function groupSessionsByProject(sessionItems) {
+    const groups = [];
+    const groupMap = new Map();
+    const ungroupedSessions = [];
+    for (const session of sessionItems) {
+      const projectName = getSessionProjectName(session);
+      if (!projectName) {
+        ungroupedSessions.push(session);
+        continue;
+      }
+      if (!groupMap.has(projectName)) {
+        const cwd = getSessionEffectiveCwd(session);
+        const group = {
+          name: projectName,
+          cwd,
+          sessions: [],
+          latestUpdated: session.updated || '',
+        };
+        groupMap.set(projectName, group);
+        groups.push(group);
+      }
+      const group = groupMap.get(projectName);
+      group.sessions.push(session);
+      if (new Date(session.updated || 0) > new Date(group.latestUpdated || 0)) {
+        group.latestUpdated = session.updated || group.latestUpdated;
+        group.cwd = getSessionEffectiveCwd(session) || group.cwd;
+      }
+    }
+    return {
+      groups: groups.sort((a, b) => new Date(b.latestUpdated || 0) - new Date(a.latestUpdated || 0)),
+      ungroupedSessions,
+    };
+  }
+
+  function createSessionListItem(session) {
+    const item = document.createElement('div');
+    item.className = `session-item${session.id === currentSessionId ? ' active' : ''}`;
+    item.dataset.id = session.id;
+    const sessionCwd = getSessionEffectiveCwd(session);
+    if (sessionCwd) item.title = sessionCwd;
+    item.innerHTML = `
+      <div class="session-item-main">
+        <span class="session-item-title">${escapeHtml(session.title || 'Untitled')}</span>
+        ${session.isRunning ? '<span class="session-item-status">运行中</span>' : ''}
+      </div>
+      ${session.hasUnread ? '<span class="session-unread-dot"></span>' : ''}
+      <span class="session-item-time">${timeAgo(session.updated)}</span>
+      <div class="session-item-actions">
+        <button class="session-item-btn edit" title="重命名">✎</button>
+        <button class="session-item-btn delete" title="删除">×</button>
+      </div>
+    `;
+
+    item.addEventListener('click', (e) => {
+      const target = e.target;
+      if (target.classList.contains('delete')) {
+        e.stopPropagation();
+        const doDelete = () => {
+          if (getLastSessionForAgent(currentAgent) === session.id) {
+            localStorage.removeItem(getAgentSessionStorageKey(currentAgent));
+          }
+          invalidateSessionCache(session.id);
+          send({ type: 'delete_session', sessionId: session.id });
+          if (session.id === currentSessionId) {
+            resetChatView(currentAgent);
+          }
+        };
+        if (skipDeleteConfirm) {
+          doDelete();
+        } else {
+          showDeleteConfirm(session.agent, doDelete);
+        }
+        return;
+      }
+      if (target.classList.contains('edit')) {
+        e.stopPropagation();
+        startEditSessionTitle(item, session);
+        return;
+      }
+      openSession(session.id);
+    });
+
+    return item;
+  }
+
   function updateCwdBadge() {
     if (!chatCwd) return;
     if (currentCwd) {
@@ -1754,6 +1857,16 @@
       case 'session_info':
         if (pendingNewSessionRequest) pendingNewSessionRequest = null;
         const snapshot = normalizeSessionSnapshot(msg);
+        sessions = sessions.map((session) => (
+          session.id === snapshot.sessionId
+            ? {
+                ...session,
+                cwd: snapshot.cwd || session.cwd || '',
+                projectName: snapshot.cwd ? getPathLeaf(snapshot.cwd) : session.projectName || '',
+                title: snapshot.title || session.title,
+              }
+            : session
+        ));
         if (activeSessionLoad?.sessionId === msg.sessionId) {
           activeSessionLoad.snapshot = snapshot;
         }
@@ -3135,53 +3248,29 @@
       return;
     }
 
-    for (const s of visibleSessions) {
-      const item = document.createElement('div');
-      item.className = `session-item${s.id === currentSessionId ? ' active' : ''}`;
-      item.dataset.id = s.id;
-      item.innerHTML = `
-        <div class="session-item-main">
-          <span class="session-item-title">${escapeHtml(s.title || 'Untitled')}</span>
-          ${s.isRunning ? '<span class="session-item-status">运行中</span>' : ''}
-        </div>
-        ${s.hasUnread ? '<span class="session-unread-dot"></span>' : ''}
-        <span class="session-item-time">${timeAgo(s.updated)}</span>
-        <div class="session-item-actions">
-          <button class="session-item-btn edit" title="重命名">✎</button>
-          <button class="session-item-btn delete" title="删除">×</button>
-        </div>
+    const { groups: projectGroups, ungroupedSessions } = groupSessionsByProject(visibleSessions);
+    for (const group of projectGroups) {
+      const groupEl = document.createElement('section');
+      groupEl.className = 'session-project-group';
+
+      const header = document.createElement('div');
+      header.className = 'session-project-header';
+      header.title = group.cwd || group.name;
+      header.innerHTML = `
+        <span class="session-project-name">${escapeHtml(group.name)}</span>
+        <span class="session-project-count">${group.sessions.length}</span>
       `;
+      groupEl.appendChild(header);
 
-      item.addEventListener('click', (e) => {
-        const target = e.target;
-        if (target.classList.contains('delete')) {
-          e.stopPropagation();
-          const doDelete = () => {
-            if (getLastSessionForAgent(currentAgent) === s.id) {
-              localStorage.removeItem(getAgentSessionStorageKey(currentAgent));
-            }
-            invalidateSessionCache(s.id);
-            send({ type: 'delete_session', sessionId: s.id });
-            if (s.id === currentSessionId) {
-              resetChatView(currentAgent);
-            }
-          };
-          if (skipDeleteConfirm) {
-            doDelete();
-          } else {
-            showDeleteConfirm(s.agent, doDelete);
-          }
-          return;
-        }
-        if (target.classList.contains('edit')) {
-          e.stopPropagation();
-          startEditSessionTitle(item, s);
-          return;
-        }
-        openSession(s.id);
-      });
+      for (const s of group.sessions) {
+        groupEl.appendChild(createSessionListItem(s));
+      }
 
-      sessionList.appendChild(item);
+      sessionList.appendChild(groupEl);
+    }
+
+    for (const s of ungroupedSessions) {
+      sessionList.appendChild(createSessionListItem(s));
     }
   }
 

public/style.css

@@ -164,6 +164,17 @@ html[data-theme='coolvibe'] .attachment-tray-note {
   border-color: rgba(191, 220, 228, 0.96);
 }
 
+html[data-theme='coolvibe'] .session-project-header {
+  background: linear-gradient(180deg, rgba(247, 251, 252, 0.94), rgba(239, 248, 250, 0.88));
+  color: #5f7f87;
+  border-bottom: 1px solid rgba(191, 220, 228, 0.56);
+}
+
+html[data-theme='coolvibe'] .session-project-count {
+  background: rgba(8, 145, 178, 0.1);
+  color: #0a6d83;
+}
+
 html[data-theme='coolvibe'] .session-item {
   border: 1px solid transparent;
   border-radius: 14px;
@@ -290,6 +301,17 @@ html[data-theme='coolvibe'] .theme-card.active {
   box-shadow: 0 0 0 2px rgba(8, 145, 178, 0.14);
 }
 
+html[data-theme='editorial'] .session-project-header {
+  background: linear-gradient(180deg, rgba(239, 232, 220, 0.94), rgba(246, 241, 232, 0.84));
+  color: #7f6f61;
+  border-bottom: 1px solid rgba(139, 94, 60, 0.12);
+}
+
+html[data-theme='editorial'] .session-project-count {
+  background: rgba(139, 94, 60, 0.1);
+  color: #71482d;
+}
+
 html[data-theme='editorial'] {
   --bg-primary: #f6f1e8;
   --bg-secondary: #efe8dc;
@@ -621,6 +643,46 @@ body.session-loading-active {
   line-height: 1.6;
   background: rgba(255, 249, 242, 0.7);
 }
+.session-project-group {
+  margin: 0 0 12px;
+}
+.session-project-header {
+  position: sticky;
+  top: 0;
+  z-index: 2;
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  gap: 8px;
+  margin: 4px 2px 5px;
+  padding: 6px 8px 5px;
+  background: rgba(242, 235, 226, 0.92);
+  backdrop-filter: blur(8px);
+  color: var(--text-muted);
+  font-size: 11px;
+  font-weight: 800;
+  letter-spacing: 0.08em;
+  text-transform: uppercase;
+}
+.session-project-name {
+  min-width: 0;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+.session-project-count {
+  display: inline-flex;
+  align-items: center;
+  justify-content: center;
+  min-width: 22px;
+  height: 18px;
+  padding: 0 7px;
+  border-radius: 999px;
+  background: var(--bg-tertiary);
+  color: var(--text-secondary);
+  font-size: 10px;
+  letter-spacing: 0;
+}
 .session-item {
   display: flex;
   align-items: center;