make some overall QoL improvements

public/js/script.js

@@ -120,6 +120,7 @@ let workspaceMode = localStorage.getItem("krishd-workspace-mode") || "basic";
 let onboardingStep = 1, onboardingIntent = "ask";
 let chatLoadingDepth = 0;
 let chatActivityDepth = 0;
+let noticeTimer = null;
 
 let availableModelsById = new Map();
 const personalitySelect = document.getElementById("personalitySelect");
@@ -234,7 +235,15 @@ const branchExplorer = createBranchExplorer({state: conversation, setActiveChat,
 
 function setNotice(message = "", state = "") {
     const notice = document.getElementById("workspaceNotice");
-    if (notice) { notice.textContent = state === "error" ? message : ""; notice.classList.toggle("hidden", state !== "error"); }
+    clearTimeout(noticeTimer);
+    if (notice) {
+        const visible = state === "error" || state === "success";
+        notice.textContent = visible ? message : "";
+        notice.classList.toggle("hidden", !visible);
+        notice.classList.toggle("error", state === "error");
+        notice.classList.toggle("success", state === "success");
+        if (state === "success") noticeTimer = setTimeout(() => setNotice(), 3500);
+    }
     return { message, state };
 }
 
@@ -603,6 +612,18 @@ function openModelSettings() {
     requestAnimationFrame(() => modelSelect?.focus());
 }
 
+function formatChatActivity(value) {
+    if (!value) return "";
+    const date = new Date(value.includes("T") ? value : `${value.replace(" ", "T")}Z`);
+    if (Number.isNaN(date.getTime())) return "";
+    const today = new Date();
+    const sameDay = (a, b) => a.getFullYear() === b.getFullYear() && a.getMonth() === b.getMonth() && a.getDate() === b.getDate();
+    if (sameDay(date, today)) return new Intl.DateTimeFormat(undefined, {hour: "numeric", minute: "2-digit"}).format(date);
+    const yesterday = new Date(today); yesterday.setDate(today.getDate() - 1);
+    if (sameDay(date, yesterday)) return "Yesterday";
+    return new Intl.DateTimeFormat(undefined, {month: "short", day: "numeric", ...(date.getFullYear() === today.getFullYear() ? {} : {year: "numeric"})}).format(date);
+}
+
 function renderChatList() {
     const query = chatSearchInput.value.trim().toLowerCase();
     const source = query ? (conversation.chatSearchResults ?? []) : conversation.chatSessions;
@@ -657,7 +678,8 @@ function renderChatList() {
             const chatType = chat.assistant_persona_id
                 ? `Roleplay${chat.user_persona_name ? ` · ${chat.user_persona_name}` : ""}`
                 : "Assistant chat";
-            meta.textContent = chat.source_chat_id ? `Branch · ${chatType}` : chatType;
+            const activity = formatChatActivity(chat.updated_at);
+            meta.textContent = [chat.source_chat_id ? `Branch · ${chatType}` : chatType, activity].filter(Boolean).join(" · ");
             remove.type = "button";
             remove.className = "chat-item-delete";
             remove.textContent = "Delete";
@@ -668,10 +690,11 @@ function renderChatList() {
                 await deleteChat(chat.id);
             });
             content.append(title, meta);
-            if (query && chat.matched_content) {
+            const preview = query && chat.matched_content ? chat.matched_content : chat.last_message_preview;
+            if (preview) {
                 const excerpt = document.createElement("small");
-                const normalized = chat.matched_content.replace(/\s+/g, " ");
-                const matchAt = normalized.toLowerCase().indexOf(query);
+                const normalized = preview.replace(/\s+/g, " ").trim();
+                const matchAt = query ? normalized.toLowerCase().indexOf(query) : -1;
                 const start = Math.max(0, matchAt - 35);
                 excerpt.className = "chat-item-excerpt";
                 excerpt.textContent = `${start ? "…" : ""}${normalized.slice(start, start + 110)}${normalized.length > start + 110 ? "…" : ""}`;
@@ -778,7 +801,7 @@ async function updateChatOrganization(id, changes) {
     const res = await put(`/chats/${id}/organization`, payload);
     if (res.error) return setNotice(res.error, "error");
     const index = conversation.chatSessions.findIndex((item) => item.id === id);
-    if (index >= 0) conversation.chatSessions[index] = res.chat;
+    if (index >= 0) conversation.chatSessions[index] = {...conversation.chatSessions[index], ...res.chat};
     updateWorkspaceCopy();
     renderChatList();
     updateChatActionState();
@@ -799,7 +822,9 @@ async function clearChat(id) {
     if (res.error) return setNotice(res.error, "error");
     conversation.messageRetryState = new Map();
     conversation.historyPage = null;
-    conversation.currentMessages = []; renderMessages(); await loadSummary(); setNotice("Chat cleared.", "success");
+    chat.last_message_preview = null;
+    chat.updated_at = new Date().toISOString();
+    conversation.currentMessages = []; renderMessages(); renderChatList(); await loadSummary(); setNotice("Chat cleared.", "success");
 }
 
 const personaStateFields = [