Chat layout: history in the main sidebar, consistent header, cleaner icon

- Desktop: on /chat the main sidebar shows the chat list (search, New chat,
  items with rename/delete, active highlight) in place of the deck
  navigation; the separate second column is gone and the chat uses the full
  width. The expand/collapse chevron sits outside the swappable section and
  a collapsed rail stays clean (the highlighted Chat row already opens a
  new chat). Active conversation travels via a tiny store (lib/chat-active)
  so the sidebar needs no useSearchParams and pages stay static.
- Header (phones): history, theme and New chat are now identical chips -
  same 44px hit area, rounded-2xl, border/surface tokens, size-5 icons,
  even spacing; the title block truncates cleanly. ThemeToggle gained a
  'plain' variant so the header styles it without touching other pages.
- ChatIcon redrawn (clean message-circle, no inner lines) and the empty
  state uses the app's icon-chip pattern (size-12 chip, accent-600/200)
  instead of the bare oversized glyph; the model chip icon follows.
- Also fixed a pre-existing dev-only breakage found while verifying: the
  tab-bar bounce animated three keyframes with a spring, which framer
  motion's dev build throws on - breaking client updates in the dev
  instance (library tab switching, sheet Escape). It now uses a tween.
- Dev metadata keeps the Apple icons in both branches.
- SW -> freezmo-v35.

app/layout.tsx

@@ -36,18 +36,16 @@ export const metadata: Metadata = {
       { url: "/icons/splash-1668x2388.png", media: "(device-width: 834px) and (device-height: 1194px) and (-webkit-device-pixel-ratio: 2)" },
     ],
   },
-  icons: IS_DEV_INSTANCE
+  icons: {
-    ? {
+    icon: IS_DEV_INSTANCE
-        // Dev wears its own favicon so the two instances are never confused.
+      ? // Dev wears its own favicon so the two instances are never confused.
-        icon: [{ url: "/icons/dev-favicon.svg", type: "image/svg+xml" }],
+        [{ url: "/icons/dev-favicon.svg", type: "image/svg+xml" }]
-      }
+      : [
-    : {
+          // ?v=2 busts browser favicon caches after the icon redesign.
-    icon: [
+          { url: "/icons/favicon-32.png?v=2", sizes: "32x32", type: "image/png" },
-      // ?v=2 busts browser favicon caches after the icon redesign.
+          { url: "/icons/icon-192.png?v=2", sizes: "192x192", type: "image/png" },
-      { url: "/icons/favicon-32.png?v=2", sizes: "32x32", type: "image/png" },
+          { url: "/icons/icon-512.png?v=2", sizes: "512x512", type: "image/png" },
-      { url: "/icons/icon-192.png?v=2", sizes: "192x192", type: "image/png" },
+        ],
-      { url: "/icons/icon-512.png?v=2", sizes: "512x512", type: "image/png" },
-    ],
     apple: [
       { url: "/icons/apple-touch-icon.png?v=2", sizes: "180x180" },
       { url: "/icons/apple-touch-icon-167.png?v=2", sizes: "167x167" },

components/Sidebar.tsx

@@ -1,8 +1,11 @@
 "use client";
 
 import Link from "next/link";
+import { usePathname } from "next/navigation";
 import { useMemo, useState, useSyncExternalStore, type ReactNode } from "react";
 
+import { SidebarChatSection } from "@/components/chat/SidebarChatSection";
+
 import {
   ChatIcon,
   ChevronLeftIcon,
@@ -35,6 +38,8 @@ const COLLAPSE_KEY = "freezmo.sidebarCollapsed";
  * there is no drawer any more, so this is the only consumer of the rail.
  */
 function NavContent({ collapsed = false }: { collapsed?: boolean }) {
+  const pathname = usePathname();
+  const onChat = pathname === "/chat";
   const decks = useSyncExternalStore(deckStore.subscribe, deckStore.getSnapshot, deckStore.getServerSnapshot);
   const folders = useSyncExternalStore(
     folderStore.subscribe,
@@ -149,6 +154,7 @@ function NavContent({ collapsed = false }: { collapsed?: boolean }) {
       {/* chat with your notes --------------------------------------------- */}
       <Link
         href="/chat"
+        aria-current={onChat ? "page" : undefined}
         className={cn("nav-row mb-3", collapsed && "justify-center px-2")}
         title={t("chat.nav")}
       >
@@ -156,19 +162,27 @@ function NavContent({ collapsed = false }: { collapsed?: boolean }) {
         {!collapsed ? <span className="flex-1 truncate text-left">{t("chat.nav")}</span> : null}
       </Link>
 
-      <nav aria-label={t("sidebar.library")} className="thin-scroll min-h-0 flex-1 space-y-0.5 overflow-y-auto">
+      {/* The expand control sits outside the swappable section, so it stays
-        {collapsed ? (
+          reachable when the chat list replaces the deck navigation. */}
-          <button
+      {collapsed ? (
-            type="button"
+        <button
-            onClick={() => sidebarCollapse.set(false)}
+          type="button"
-            aria-label={t("sidebar.expand")}
+          onClick={() => sidebarCollapse.set(false)}
-            title={t("sidebar.expand")}
+          aria-label={t("sidebar.expand")}
-            className="nav-row justify-center px-2"
+          title={t("sidebar.expand")}
-          >
+          className="nav-row mb-1 justify-center px-2"
-            <ChevronRightIcon className="size-4" />
+        >
-          </button>
+          <ChevronRightIcon className="size-4" />
-        ) : null}
+        </button>
+      ) : null}
 
+      {/* On the Chat route the chat list takes the deck navigation's place. */}
+      {onChat ? <SidebarChatSection collapsed={collapsed} /> : null}
+
+      <nav
+        aria-label={t("sidebar.library")}
+        className={cn("thin-scroll min-h-0 flex-1 space-y-0.5 overflow-y-auto", onChat && "hidden")}
+      >
         {/* All decks + Unorganized are views, so they sit above Folders. */}
         <div className={cn("space-y-0.5", !collapsed && "mb-1")}>
           {viewRow(

components/TabBar.tsx

@@ -51,7 +51,10 @@ export function TabBar() {
     <motion.span
       key={`${key}-${isActive ? pathname : "idle"}`}
       animate={isActive && !reduceMotion ? { scale: [1, 1.16, 1] } : { scale: 1 }}
-      transition={springSnappy}
+      // A three-keyframe bounce needs a tween: framer-motion's dev build throws
+      // on springs with more than two keyframes (which broke client updates in
+      // the dev instance).
+      transition={isActive && !reduceMotion ? { duration: 0.32, ease: "easeOut" } : springSnappy}
       className="relative z-10 grid place-items-center"
     >
       {children}

components/ThemeToggle.tsx

@@ -61,7 +61,7 @@ export function useTheme() {
   return { theme, toggle: () => apply(theme === "dark" ? "light" : "dark") };
 }
 
-export function ThemeToggle({ className }: { className?: string }) {
+export function ThemeToggle({ className, plain = false }: { className?: string; plain?: boolean }) {
   const { theme, toggle } = useTheme();
   const { t } = useI18n();
   const dark = theme === "dark";
@@ -77,8 +77,11 @@ export function ThemeToggle({ className }: { className?: string }) {
       title={dark ? t("common.lightMode") : t("common.darkMode")}
       className={cn(
         // A bordered chip with a press affordance: the bare sun/moon glyph was
-        // easy to read as decoration rather than a control.
+        // easy to read as decoration rather than a control. `plain` drops the
-        "touch-target inline-flex size-9 items-center justify-center rounded-full border border-[var(--hairline)] bg-[var(--surface-strong)] text-[var(--text-muted)] transition hover:bg-[var(--hover)] hover:text-[var(--text)] active:scale-95",
+        // chip chrome so a header can style the button itself (chat header).
+        plain
+          ? "text-[var(--text-muted)] transition hover:text-[var(--text)] active:scale-95"
+          : "touch-target inline-flex size-9 items-center justify-center rounded-full border border-[var(--hairline)] bg-[var(--surface-strong)] text-[var(--text-muted)] transition hover:bg-[var(--hover)] hover:text-[var(--text)] active:scale-95",
         className,
       )}
     >

components/chat/ChatScreen.tsx

@@ -7,7 +7,7 @@ import Link from "next/link";
 
 import { Composer, type PendingAttachment } from "./Composer";
 import { ContextPicker } from "./ContextPicker";
-import { ChatHistoryList, HistorySheet } from "./HistoryPanel";
+import { HistorySheet } from "./HistoryPanel";
 import { MessageRow } from "./MessageRow";
 import { ModelPicker } from "./ModelPicker";
 import { ChatIcon, ChevronDownIcon, ChevronLeftIcon, HistoryIcon, PlusIcon, RefreshIcon } from "@/components/icons";
@@ -18,6 +18,7 @@ import { ApiError } from "@/lib/client-api";
 import { extractChatAttachment, streamChat } from "@/lib/chat-client";
 import { buildChatContext, deckHasNotes } from "@/lib/chat-context";
 import { takeChatSeed, type ChatSeed } from "@/lib/chat-seed";
+import { chatActive } from "@/lib/chat-active";
 import { chatHistoryStore, conversationMessages, deleteConversation, ensureChatsHydrated, getConversation, renameConversation, saveConversation } from "@/lib/chat-store";
 import {
   chatMessageId,
@@ -123,6 +124,7 @@ export function ChatScreen() {
     setError(null);
     if (found.model) setModel(found.model);
     loadedRef.current = found.id;
+    chatActive.set(found.id);
   }, []);
 
   const conversationParam = search.get("c");
@@ -240,6 +242,7 @@ export function ChatScreen() {
       const id = conversationId ?? chatMessageId("chat");
       if (!conversationId) {
         setConversationId(id);
+        chatActive.set(id);
         // Keep the URL in step so a reload continues this conversation.
         // history.replaceState avoids a router round-trip for the same page.
         window.history.replaceState(null, "", `/chat?c=${id}`);
@@ -403,7 +406,7 @@ export function ChatScreen() {
     setMessages(messages.slice(0, lastUserIndex));
   };
 
-  const newChat = () => {
+  const resetView = useCallback(() => {
     abortRef.current?.abort();
     loadedRef.current = null;
     setConversationId(null);
@@ -413,10 +416,28 @@ export function ChatScreen() {
     setAttachments([]);
     setDraft("");
     setError(null);
-    setHistoryOpen(false);
+    chatActive.set(null);
     window.history.replaceState(null, "", "/chat");
+  }, []);
+
+  const newChat = () => {
+    resetView();
+    setHistoryOpen(false);
   };
 
+  /* The sidebar can start a new chat (URL -> /chat) while this screen is open. */
+  useEffect(() => {
+    if (conversationParam || !loadedRef.current) return;
+    resetView();
+  }, [conversationParam, resetView]);
+
+  /* ...and delete the conversation that is currently open. */
+  useEffect(() => {
+    if (!conversationId || !loadedRef.current) return;
+    if (getConversation(conversationId)) return;
+    resetView();
+  }, [conversations, conversationId, resetView]);
+
   const openConversation = (id: string) => {
     abortRef.current?.abort();
     setHistoryOpen(false);
@@ -501,31 +522,15 @@ export function ChatScreen() {
 
   return (
     <div className="flex h-full min-h-0 w-full">
-      {/* Desktop: the conversation list lives in its own column. */}
+      {/* Desktop's conversation list lives in the main sidebar (on /chat). */}
-      <aside className="hidden w-64 shrink-0 flex-col border-r border-[var(--hairline-soft)] bg-[var(--surface-sunken)] p-2 lg:flex">
-        <h2 className="px-1 pb-1 pt-1 text-[12px] font-semibold uppercase tracking-wide text-[var(--text-subtle)]">
-          {t("chat.history")}
-        </h2>
-        <ChatHistoryList
-          conversations={conversations}
-          currentId={conversationId}
-          query={query}
-          onQueryChange={setQuery}
-          onOpen={openConversation}
-          onRename={renameConversation}
-          onDelete={handleDeleteConversation}
-          onNew={newChat}
-        />
-      </aside>
-
       <div className="relative flex h-full min-h-0 min-w-0 flex-1 flex-col" style={{ paddingBottom: "var(--chat-keyboard, 0px)" }}>
-      <header className="glass sticky top-0 z-30 flex h-14 shrink-0 items-center gap-1.5 px-2 sm:px-4">
+      <header className="glass sticky top-0 z-30 flex h-14 shrink-0 items-center gap-2 px-2 sm:px-4">
         <button
           type="button"
           onClick={() => (window.history.length > 1 ? router.back() : router.push("/"))}
           aria-label={t("chat.back")}
           title={t("chat.back")}
-          className="grid size-10 shrink-0 place-items-center rounded-2xl text-[var(--text-muted)] transition hover:bg-[var(--hover)] hover:text-[var(--text)] lg:hidden"
+          className="grid size-11 shrink-0 place-items-center rounded-2xl text-[var(--text-muted)] transition hover:bg-[var(--hover)] hover:text-[var(--text)] lg:hidden"
         >
           <ChevronLeftIcon className="size-5" />
         </button>
@@ -536,26 +541,31 @@ export function ChatScreen() {
             {seed ? ` · ${seed.label}` : ""}
           </p>
         </div>
-        <button
+        {/* Actions share one size, radius, border, background and hit area. */}
-          type="button"
+        <div className="flex shrink-0 items-center gap-1.5">
-          onClick={() => setHistoryOpen(true)}
+          <button
-          aria-label={t("chat.history")}
+            type="button"
-          title={t("chat.history")}
+            onClick={() => setHistoryOpen(true)}
-          className="grid size-10 shrink-0 place-items-center rounded-2xl text-[var(--text-muted)] transition hover:bg-[var(--hover)] hover:text-[var(--text)] lg:hidden"
+            aria-label={t("chat.history")}
-        >
+            title={t("chat.history")}
-          <HistoryIcon className="size-5" />
+            className="grid size-11 place-items-center rounded-2xl border border-[var(--glass-border)] bg-[var(--surface-strong)] text-[var(--text-muted)] transition hover:bg-[var(--hover)] hover:text-[var(--text)] lg:hidden"
-        </button>
+          >
-        <ThemeToggle className="hidden lg:grid" />
+            <HistoryIcon className="size-5" />
-        <button
+          </button>
-          type="button"
+          <ThemeToggle
-          onClick={newChat}
+            plain
-          aria-label={t("chat.new")}
+            className="grid size-11 place-items-center rounded-2xl border border-[var(--glass-border)] bg-[var(--surface-strong)]"
-          title={t("chat.new")}
+          />
-          className="flex h-10 shrink-0 items-center gap-1.5 rounded-2xl border border-[var(--glass-border)] bg-[var(--surface-strong)] px-3 text-[12.5px] font-medium text-[var(--text-muted)] transition hover:bg-[var(--hover)] hover:text-[var(--text)]"
+          <button
-        >
+            type="button"
-          <PlusIcon className="size-4" />
+            onClick={newChat}
-          <span className="hidden sm:inline">{t("chat.new")}</span>
+            aria-label={t("chat.new")}
-        </button>
+            title={t("chat.new")}
+            className="grid size-11 place-items-center rounded-2xl border border-[var(--glass-border)] bg-[var(--surface-strong)] text-[var(--text-muted)] transition hover:bg-[var(--hover)] hover:text-[var(--text)]"
+          >
+            <PlusIcon className="size-5" />
+          </button>
+        </div>
       </header>
 
       <div className="relative min-h-0 flex-1">
@@ -564,8 +574,10 @@ export function ChatScreen() {
             {messages.length === 0 ? (
               <div className="space-y-5 py-6">
                 <div className="text-center">
-                  <ChatIcon className="mx-auto size-10 text-accent-400" />
+                  <span className="mx-auto mb-4 grid size-12 place-items-center rounded-2xl border border-[var(--hairline)] bg-[var(--surface-strong)] text-accent-600 dark:text-accent-200">
-                  <h2 className="mt-3 text-[20px] font-semibold tracking-[-0.01em] text-[var(--text)]">{t("chat.emptyTitle")}</h2>
+                    <ChatIcon className="size-6" />
+                  </span>
+                  <h2 className="text-[20px] font-semibold tracking-[-0.01em] text-[var(--text)]">{t("chat.emptyTitle")}</h2>
                   <p className="mx-auto mt-1.5 max-w-sm text-[13.5px] leading-relaxed text-[var(--text-subtle)]">
                     {t("chat.emptyHint")}
                   </p>

components/chat/SidebarChatSection.tsx

@@ -0,0 +1,59 @@
+"use client";
+
+import { useRouter } from "next/navigation";
+import { useState, useSyncExternalStore } from "react";
+
+import { ChatHistoryList } from "./HistoryPanel";
+import { chatActive } from "@/lib/chat-active";
+import { chatHistoryStore, deleteConversation, renameConversation, saveConversation } from "@/lib/chat-store";
+import { useI18n } from "@/lib/i18n";
+import { showToast } from "@/lib/toast";
+import type { ChatConversation } from "@/lib/schemas";
+
+/**
+ * Chat history inside the main sidebar: when the Chat section is active the
+ * deck navigation is replaced by the chat list (search, new chat, items with
+ * rename/delete). Collapsed, it keeps one New-chat icon row.
+ */
+export function SidebarChatSection({ collapsed }: { collapsed: boolean }) {
+  const { t } = useI18n();
+  const router = useRouter();
+  const conversations = useSyncExternalStore(
+    chatHistoryStore.subscribe,
+    chatHistoryStore.getSnapshot,
+    chatHistoryStore.getServerSnapshot,
+  );
+  const activeId = useSyncExternalStore(chatActive.subscribe, chatActive.getSnapshot, chatActive.getServerSnapshot);
+  const [query, setQuery] = useState("");
+
+  const onDelete = (conversation: ChatConversation) => {
+    deleteConversation(conversation.id);
+    showToast({
+      message: t("chat.deletedChat"),
+      actionLabel: t("toast.undo"),
+      onAction: () => saveConversation(conversation),
+    });
+  };
+
+  // Collapsed, the list needs width — the highlighted Chat row above (and the
+  // expand chevron) already cover navigation, so the section renders nothing.
+  if (collapsed) return null;
+
+  return (
+    <div className="flex min-h-0 flex-1 flex-col">
+      <h2 className="px-2 pb-1 pt-1 text-[11px] font-semibold uppercase tracking-wider text-[var(--text-subtle)]">
+        {t("chat.history")}
+      </h2>
+      <ChatHistoryList
+        conversations={conversations}
+        currentId={activeId}
+        query={query}
+        onQueryChange={setQuery}
+        onOpen={(id) => router.push(`/chat?c=${id}`)}
+        onRename={renameConversation}
+        onDelete={onDelete}
+        onNew={() => router.push("/chat")}
+      />
+    </div>
+  );
+}

components/icons.tsx

@@ -321,8 +321,7 @@ export function AddToHomeIcon({ className }: IconProps) {
 export function ChatIcon({ className }: IconProps) {
   return (
     <Svg className={className}>
-      <path d="M20 12a7.5 7.5 0 0 1-7.5 7.5H8.2L4 22v-4.6A7.5 7.5 0 0 1 12.5 4.5 7.5 7.5 0 0 1 20 12Z" />
+      <path d="M21 11.5a8.38 8.38 0 0 1-.9 3.8 8.5 8.5 0 0 1-7.6 4.7 8.38 8.38 0 0 1-3.8-.9L3 21l1.9-5.7a8.38 8.38 0 0 1-.9-3.8 8.5 8.5 0 0 1 4.7-7.6 8.38 8.38 0 0 1 3.8-.9h.5a8.48 8.48 0 0 1 8 8v.5Z" />
-      <path d="M9 10.5h7M9 13.8h4.5" />
     </Svg>
   );
 }

lib/chat-active.ts

@@ -0,0 +1,29 @@
+"use client";
+
+/**
+ * Which conversation the chat screen is currently showing, for surfaces
+ * outside the chat route (the sidebar list highlights it). A tiny external
+ * store instead of reading `?c=` from the URL, because the sidebar renders on
+ * every page and `useSearchParams` there would force pages dynamic.
+ */
+
+let active: string | null = null;
+const listeners = new Set<() => void>();
+
+export const chatActive = {
+  set(id: string | null): void {
+    if (active === id) return;
+    active = id;
+    listeners.forEach((listener) => listener());
+  },
+  subscribe(listener: () => void): () => void {
+    listeners.add(listener);
+    return () => listeners.delete(listener);
+  },
+  getSnapshot(): string | null {
+    return active;
+  },
+  getServerSnapshot(): string | null {
+    return null;
+  },
+};

public/sw.js

@@ -9,7 +9,7 @@
  *
  * Bumping CACHE_VERSION is how a new deploy invalidates old assets.
  */
-const CACHE_VERSION = "freezmo-v34";
+const CACHE_VERSION = "freezmo-v35";
 const SHELL_CACHE = `${CACHE_VERSION}-shell`;
 const ASSET_CACHE = `${CACHE_VERSION}-assets`;