diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9d1bb19..1a13187 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -20,6 +20,10 @@ All notable changes to LLeMbas Desktop. The format follows
   server says it, unless this computer's or another of the app's nine is chosen (kept in the app;
   the window opens again in it). The theme is the account's, and choosing one saves it there, so
   the web interface and the phone follow; on a server that cannot be told, it is kept in the app.
+- **Pinned chats and chat folders.** The sidebar lists the pinned chats first, then the account's
+  folders, nested and folded as the server keeps them, then the rest by day. A chat's menu pins
+  it and moves it into a folder or a new one; a folder's menu renames it, makes one inside it, or
+  deletes it (its chats stay, back in the list). The search line still lists every match.
 
 ### Fixed
 
diff --git a/scripts/gen-i18n.py b/scripts/gen-i18n.py
index 8c6c8d1..2d16c6c 100755
--- a/scripts/gen-i18n.py
+++ b/scripts/gen-i18n.py
@@ -471,6 +471,19 @@ KEYS = (
     "Kept in this app on this computer; the account's theme stays as it is.",
     "The account's (%(language)s)",
     "Saved to your account: the web interface and the phone follow it too.",
+    # list.js, chat.js: pinned chats and chat folders
+    "Pinned chats",
+    "Pin chat",
+    "Unpin chat",
+    "New folder",
+    "Rename folder",
+    "Delete folder",
+    "Folder name",
+    "Move to folder…",
+    "No folder",
+    "New folder…",
+    "Create",
+    "“%(name)s” and the folders inside it are deleted. Their chats stay, back in the list.",
 )
 
 # The app's own sentences. The mode names (Manual, Edit, Auto, Plan) stay English, as the
@@ -714,6 +727,11 @@ OWN: dict[str, dict[str, str]] = {
         "Kept in this app on this computer; the account's theme stays as it is.": "Uloženo v této aplikaci na tomto počítači; vzhled účtu zůstává, jak je.",
         "The account's (%(language)s)": "Podle účtu (%(language)s)",
         "Saved to your account: the web interface and the phone follow it too.": "Uloženo do vašeho účtu: řídí se jím i webové rozhraní a telefon.",
+        "Move to folder…": "Přesunout do složky…",
+        "No folder": "Bez složky",
+        "New folder…": "Nová složka…",
+        "Create": "Vytvořit",
+        "“%(name)s” and the folders inside it are deleted. Their chats stay, back in the list.": "„%(name)s“ a složky v ní se smažou. Jejich konverzace zůstanou, zpět v seznamu.",
     },
     "de": {
         "Sign in again: the server no longer accepts this app's sign-in.": "Melden Sie sich erneut an: Der Server nimmt die Anmeldung dieser App nicht mehr an.",
@@ -952,6 +970,11 @@ OWN: dict[str, dict[str, str]] = {
         "Kept in this app on this computer; the account's theme stays as it is.": "In dieser App auf diesem Computer gespeichert; das Design des Kontos bleibt, wie es ist.",
         "The account's (%(language)s)": "Wie das Konto (%(language)s)",
         "Saved to your account: the web interface and the phone follow it too.": "In Ihrem Konto gespeichert: Die Weboberfläche und das Telefon folgen ihm auch.",
+        "Move to folder…": "In Ordner verschieben…",
+        "No folder": "Kein Ordner",
+        "New folder…": "Neuer Ordner…",
+        "Create": "Erstellen",
+        "“%(name)s” and the folders inside it are deleted. Their chats stay, back in the list.": "„%(name)s“ und die Ordner darin werden gelöscht. Ihre Chats bleiben, wieder in der Liste.",
     },
     "es": {
         "Sign in again: the server no longer accepts this app's sign-in.": "Vuelva a iniciar sesión: el servidor ya no acepta el inicio de sesión de esta aplicación.",
@@ -1190,6 +1213,11 @@ OWN: dict[str, dict[str, str]] = {
         "Kept in this app on this computer; the account's theme stays as it is.": "Se guarda en esta aplicación en este equipo; el tema de la cuenta no cambia.",
         "The account's (%(language)s)": "El de la cuenta (%(language)s)",
         "Saved to your account: the web interface and the phone follow it too.": "Se guarda en su cuenta: la interfaz web y el teléfono también lo siguen.",
+        "Move to folder…": "Mover a una carpeta…",
+        "No folder": "Sin carpeta",
+        "New folder…": "Nueva carpeta…",
+        "Create": "Crear",
+        "“%(name)s” and the folders inside it are deleted. Their chats stay, back in the list.": "Se eliminan «%(name)s» y las carpetas que contiene. Sus chats se quedan, de vuelta en la lista.",
     },
     "fr": {
         "Sign in again: the server no longer accepts this app's sign-in.": "Reconnectez-vous : le serveur n’accepte plus la connexion de cette application.",
@@ -1428,6 +1456,11 @@ OWN: dict[str, dict[str, str]] = {
         "Kept in this app on this computer; the account's theme stays as it is.": "Enregistré dans cette application sur cet ordinateur ; le thème du compte reste tel quel.",
         "The account's (%(language)s)": "Celle du compte (%(language)s)",
         "Saved to your account: the web interface and the phone follow it too.": "Enregistré dans votre compte : l’interface web et le téléphone le suivent aussi.",
+        "Move to folder…": "Déplacer dans un dossier…",
+        "No folder": "Aucun dossier",
+        "New folder…": "Nouveau dossier…",
+        "Create": "Créer",
+        "“%(name)s” and the folders inside it are deleted. Their chats stay, back in the list.": "« %(name)s » et les dossiers qu’il contient sont supprimés. Leurs conversations restent, de retour dans la liste.",
     },
     "hu": {
         "Sign in again: the server no longer accepts this app's sign-in.": "Jelentkezzen be újra: a szerver már nem fogadja el ennek az alkalmazásnak a bejelentkezését.",
@@ -1666,6 +1699,11 @@ OWN: dict[str, dict[str, str]] = {
         "Kept in this app on this computer; the account's theme stays as it is.": "Ebben az alkalmazásban, ezen a számítógépen tárolva; a fiók témája változatlan marad.",
         "The account's (%(language)s)": "A fióké (%(language)s)",
         "Saved to your account: the web interface and the phone follow it too.": "A fiókjába mentve: a webes felület és a telefon is ezt követi.",
+        "Move to folder…": "Áthelyezés mappába…",
+        "No folder": "Nincs mappa",
+        "New folder…": "Új mappa…",
+        "Create": "Létrehozás",
+        "“%(name)s” and the folders inside it are deleted. Their chats stay, back in the list.": "A(z) „%(name)s” és a benne lévő mappák törlődnek. A beszélgetéseik megmaradnak, vissza a listába.",
     },
     "it": {
         "Sign in again: the server no longer accepts this app's sign-in.": "Accedi di nuovo: il server non accetta più l’accesso di questa app.",
@@ -1904,6 +1942,11 @@ OWN: dict[str, dict[str, str]] = {
         "Kept in this app on this computer; the account's theme stays as it is.": "Salvato in questa app su questo computer; il tema dell’account resta com’è.",
         "The account's (%(language)s)": "Quella dell’account (%(language)s)",
         "Saved to your account: the web interface and the phone follow it too.": "Salvato nel tuo account: anche l’interfaccia web e il telefono lo seguono.",
+        "Move to folder…": "Sposta in una cartella…",
+        "No folder": "Nessuna cartella",
+        "New folder…": "Nuova cartella…",
+        "Create": "Crea",
+        "“%(name)s” and the folders inside it are deleted. Their chats stay, back in the list.": "«%(name)s» e le cartelle al suo interno vengono eliminate. Le loro chat restano, di nuovo nell’elenco.",
     },
     "pl": {
         "Sign in again: the server no longer accepts this app's sign-in.": "Zaloguj się ponownie: serwer nie przyjmuje już logowania tej aplikacji.",
@@ -2142,6 +2185,11 @@ OWN: dict[str, dict[str, str]] = {
         "Kept in this app on this computer; the account's theme stays as it is.": "Zapisane w tej aplikacji na tym komputerze; motyw konta pozostaje bez zmian.",
         "The account's (%(language)s)": "Jak na koncie (%(language)s)",
         "Saved to your account: the web interface and the phone follow it too.": "Zapisane na koncie: interfejs WWW i telefon też się do niego stosują.",
+        "Move to folder…": "Przenieś do folderu…",
+        "No folder": "Bez folderu",
+        "New folder…": "Nowy folder…",
+        "Create": "Utwórz",
+        "“%(name)s” and the folders inside it are deleted. Their chats stay, back in the list.": "„%(name)s” i foldery w nim zostaną usunięte. Ich czaty zostaną, z powrotem na liście.",
     },
     "sk": {
         "Sign in again: the server no longer accepts this app's sign-in.": "Prihláste sa znova: server už neprijíma prihlásenie tejto aplikácie.",
@@ -2380,6 +2428,11 @@ OWN: dict[str, dict[str, str]] = {
         "Kept in this app on this computer; the account's theme stays as it is.": "Uložené v tejto aplikácii na tomto počítači; vzhľad účtu zostáva, ako je.",
         "The account's (%(language)s)": "Podľa účtu (%(language)s)",
         "Saved to your account: the web interface and the phone follow it too.": "Uložené do vášho účtu: riadi sa ním aj webové rozhranie a telefón.",
+        "Move to folder…": "Presunúť do priečinka…",
+        "No folder": "Bez priečinka",
+        "New folder…": "Nový priečinok…",
+        "Create": "Vytvoriť",
+        "“%(name)s” and the folders inside it are deleted. Their chats stay, back in the list.": "„%(name)s“ a priečinky v ňom sa zmažú. Ich konverzácie zostanú, späť v zozname.",
     },
 }
 
diff --git a/tests/ui/run.mjs b/tests/ui/run.mjs
index 72bb7ac..fb2f4b2 100644
--- a/tests/ui/run.mjs
+++ b/tests/ui/run.mjs
@@ -1094,6 +1094,112 @@ test("E5: at 390 px the Appearance group stays inside the window", async () => {
   assert.deepEqual(p.errors, [])
 })
 
+// F8: pinned chats and chat folders (fixture folders.json: Waybread, and Recipes inside it, folded).
+
+function f8(over = {}) {
+  return {
+    status: status(),
+    routes: baseRoutes({
+      "GET /folders": fixture("folders"),
+      "GET /chats": {
+        chats: [
+          chatRow({ id: "chat1", title: "Waybread", pinned: true }),
+          agentChat({ id: "chat2", title: "Tidy the build", folder_id: "fold1" }),
+          chatRow({ id: "chat3", title: "Seed cake", folder_id: "fold2" }),
+          chatRow({ id: "chat4", title: "Loose ends" }),
+        ],
+        more: false,
+      },
+      "PATCH /folders/fold2": { folder: { ...fixture("folders").folders[1], collapsed: false } },
+      "PATCH /chats/chat4": { chat: chatRow({ id: "chat4", title: "Loose ends", pinned: true }) },
+      "POST /folders": fixture("folder"),
+      "DELETE /folders/fold1": null,
+      ...over,
+    }),
+    streams: {},
+  }
+}
+
+const sideText = (p) => p.$$eval("#chat-list > li", (lis) => lis.map((li) => li.textContent.replace(/\s+/g, " ").trim()))
+
+test("F8: the sidebar: pinned chats first, then the folders, nested and folded as kept, then the rest", async () => {
+  const p = await page(f8())
+  await p.waitForSelector("#chat-list .folderrow")
+  const items = await sideText(p)
+  assert.equal(items[0], "Pinned chats")
+  assert.match(items[1], /Waybread/)
+  assert.match(items[2], /Waybread\s*2/, "the folder counts the chats inside, its folders' too")
+  assert.match(items[3], /Tidy the build/)
+  assert.match(items[4], /Recipes/)
+  assert.ok(!items.some((x) => /Seed cake/.test(x)), "a folded folder's chats are not shown")
+  assert.ok(items.some((x) => /Loose ends/.test(x)))
+  assert.equal(await p.getAttribute('.folderrow[data-folder="fold2"]', "aria-expanded"), "false")
+  await p.click('.folderrow[data-folder="fold2"]')
+  await p.waitForSelector('.chatrow[data-id="chat3"]')
+  const [folded] = await p.evaluate(() => window.__mock.api("PATCH", "/folders/fold2"))
+  assert.deepEqual(folded.args.body, { collapsed: false })
+  await shot(p, "f8-folders-1280")
+  // Searching: every match, flat.
+  await p.fill("#side-search", "seed")
+  assert.deepEqual((await sideText(p)).slice(1), ["Seed cake"])
+  assert.deepEqual(p.errors, [])
+})
+
+test("F8: a chat's menu pins it and moves it into a folder, or a new one", async () => {
+  const p = await page(f8())
+  await p.waitForSelector('.chatrow[data-id="chat4"]')
+  await p.click('.chatrow[data-id="chat4"]', { button: "right" })
+  await p.click(".menu .menu__item >> text=Pin chat")
+  await p.waitForFunction(() => window.__mock.api("PATCH", "/chats/chat4").length === 1)
+  assert.deepEqual((await p.evaluate(() => window.__mock.api("PATCH", "/chats/chat4")))[0].args.body, { pinned: true })
+  await p.click('.chatrow[data-id="chat4"]', { button: "right" })
+  await p.click(".menu .menu__item >> text=Move to folder…")
+  const labels = await p.$$eval(".menu .menu__item .menu__label", (l) => l.map((x) => x.textContent.trim()))
+  assert.deepEqual(labels, ["No folder", "Waybread", "Recipes", "New folder…"])
+  await p.click(".menu .menu__item >> text=Recipes")
+  await p.waitForFunction(() => window.__mock.api("PATCH", "/chats/chat4").length === 2)
+  assert.deepEqual((await p.evaluate(() => window.__mock.api("PATCH", "/chats/chat4")))[1].args.body, { folder_id: "fold2" })
+  // A new one: named, made, and the chat moved into it.
+  await p.click('.chatrow[data-id="chat4"]', { button: "right" })
+  await p.click(".menu .menu__item >> text=Move to folder…")
+  await p.click(".menu .menu__item >> text=New folder…")
+  await p.fill("dialog[open] .dialog__input", "Lembas")
+  await p.click("dialog[open] .btn--primary")
+  await p.waitForFunction(() => window.__mock.api("PATCH", "/chats/chat4").length === 3)
+  const made = await p.evaluate(() => window.__mock.api("POST", "/folders"))
+  assert.deepEqual(made[0].args.body, { name: "Lembas" })
+  assert.deepEqual((await p.evaluate(() => window.__mock.api("PATCH", "/chats/chat4")))[2].args.body, { folder_id: "fold1" })
+  assert.deepEqual(p.errors, [])
+})
+
+test("F8: a folder's menu renames it and deletes it, its chats kept; a refusal is said", async () => {
+  const p = await page(f8({ "PATCH /folders/fold1": { __error: { status: 403, detail: "You may not manage folders." } } }))
+  await p.waitForSelector('.folderrow[data-folder="fold1"]')
+  await p.click('.folderrow[data-folder="fold1"]', { button: "right" })
+  await p.click(".menu .menu__item >> text=Rename folder")
+  await p.fill("dialog[open] .dialog__input", "Bread")
+  await p.click("dialog[open] .btn--primary")
+  await p.waitForSelector("#thread-note:not([hidden])")
+  assert.match(await p.textContent("#thread-note"), /may not manage folders/)
+  await p.click('.list__folder:has([data-folder="fold1"]) .folderrow__more')
+  await p.click(".menu .menu__item >> text=Delete folder")
+  assert.match(await p.textContent("dialog[open]"), /Their chats stay/)
+  await p.click("dialog[open] .btn--danger")
+  await p.waitForFunction(() => window.__mock.api("DELETE", "/folders/fold1").length === 1)
+  assert.equal(await p.evaluate(() => window.__mock.api("DELETE", "/chats").length), 0, "no chat deleted")
+  assert.deepEqual(p.errors, [])
+})
+
+test("F8: at 390 px the folders stay inside the sidebar", async () => {
+  const p = await page(f8(), { width: 390, height: 844 })
+  await p.evaluate(() => document.getElementById("side-toggle").click())
+  await p.waitForSelector('.folderrow[data-folder="fold1"]')
+  await p.waitForTimeout(400) // the sidebar slides in
+  assert.ok(await noSideways(p, 390), "nothing scrolls sideways")
+  await shot(p, "f8-folders-390")
+  assert.deepEqual(p.errors, [])
+})
+
 // --- Run ----------------------------------------------------------------------------------------
 
 const only = process.argv[2] || ""
diff --git a/ui/app.css b/ui/app.css
index 221b981..c31ef21 100644
--- a/ui/app.css
+++ b/ui/app.css
@@ -431,6 +431,34 @@ label, .label { font: var(--text-sm) / var(--leading-tight) var(--font-body); co
 .chatrow__state { width: var(--dot-size); height: var(--dot-size); border-radius: var(--radius-full); }
 .chatrow__state.is-busy { background: var(--accent); animation: pulse 1.4s var(--ease-in-out) infinite; }
 .chatrow__state.is-new { background: var(--leaf); }
+/* A chat folder's head: chevron · folder · name · count, and its own ⋯ beside it on one track. */
+.list__folder { display: grid; grid-template-columns: minmax(0, 1fr) var(--control-h-sm); align-items: center; }
+.folderrow {
+  display: grid;
+  grid-template-columns: 12px 16px minmax(0, 1fr) auto;
+  gap: var(--sp-2);
+  align-items: center;
+  height: var(--control-h-sm);
+  padding: 0 var(--sp-2) 0 calc(var(--sp-2) + var(--depth, 0) * var(--sp-4));
+  text-align: left;
+  font: 600 var(--text-sm) / var(--leading-tight) var(--font-ui);
+  color: var(--ink-muted);
+  background: transparent;
+  border: 0;
+  border-radius: var(--radius-lg);
+  cursor: pointer;
+}
+.folderrow:hover { color: var(--ink); background: var(--surface-hover); }
+.folderrow__chev, .folderrow__icon { display: grid; place-items: center; color: var(--ink-faint); }
+.folderrow__chev .icon { width: 12px; height: 12px; }
+.folderrow__icon .icon { width: 14px; height: 14px; }
+.folderrow__name { overflow: hidden; white-space: nowrap; text-overflow: ellipsis; }
+.folderrow__count { font: var(--text-xs) var(--font-ui); color: var(--ink-faint); }
+.folderrow__more { display: grid; place-items: center; width: var(--control-h-sm); height: var(--control-h-sm); color: var(--ink-faint); background: transparent; border: 0; border-radius: var(--radius-lg); cursor: pointer; opacity: 0; }
+.list__folder:hover .folderrow__more, .folderrow__more:focus-visible { opacity: 1; }
+.folderrow__more:hover { color: var(--ink); background: var(--surface-hover); }
+@media (hover: none) { .folderrow__more { opacity: 1; } }
+.chatrow.is-filed { padding-left: calc(var(--sp-2) + var(--depth, 1) * var(--sp-4)); }
 @keyframes pulse { 50% { opacity: 0.35; } }
 @media (prefers-reduced-motion: reduce) { .chatrow__state.is-busy { animation: none; } }
 
diff --git a/ui/i18n.js b/ui/i18n.js
index c97a220..192be46 100644
--- a/ui/i18n.js
+++ b/ui/i18n.js
@@ -103,10 +103,12 @@ const LEMBAS_I18N = {
     "Copy": "Kopírovat",
     "Copy the last command and its output": "Zkopírovat poslední příkaz a jeho výstup",
     "Counted by the model at the last reply; the categories are estimated.": "Spočítal model při poslední odpovědi; kategorie jsou odhadnuté.",
+    "Create": "Vytvořit",
     "Cut short here; the whole of it is in the web interface.": "Zde zkráceno; celé je to ve webovém rozhraní.",
     "Days": "Dny",
     "Delete": "Smazat",
     "Delete chat": "Smazat konverzaci",
+    "Delete folder": "Smazat složku",
     "Delete this chat?": "Smazat tuto konverzaci?",
     "Delete this scheduled task?": "Odstranit tuto naplánovanou úlohu?",
     "Deny": "Zamítnout",
@@ -135,6 +137,7 @@ const LEMBAS_I18N = {
     "Findings": "Zjištění",
     "Finished %(n)s": "Dokončeno: %(n)s",
     "Folder": "Složka",
+    "Folder name": "Název složky",
     "Folder on %(device)s": "Složka na zařízení %(device)s",
     "Free space": "Volné místo",
     "Hello": "Dobrý den",
@@ -176,15 +179,19 @@ const LEMBAS_I18N = {
     "Models": "Modely",
     "Models for scheduled tasks": "Modely pro naplánované úlohy",
     "More": "Více",
+    "Move to folder…": "Přesunout do složky…",
     "Never": "Nikdy",
     "New agent chat": "Nová agentní konverzace",
     "New chat": "Nová konverzace",
+    "New folder": "Nová složka",
+    "New folder…": "Nová složka…",
     "New scheduled task": "Nová naplánovaná úloha",
     "Next run": "Další spuštění",
     "No archived chats.": "Žádné archivované konverzace.",
     "No chat yet. Start one with New chat.": "Zatím žádná konverzace. Začněte ji tlačítkem Nová konverzace.",
     "No day ticked: every day.": "Žádný den nezaškrtnutý: každý den.",
     "No files written in this chat yet.": "V tomto chatu se zatím nezapsal žádný soubor.",
+    "No folder": "Bez složky",
     "No folder yet: add one under Settings, Project folders.": "Zatím žádná složka: přidejte ji v Nastavení, Složky projektů.",
     "No folder yet: the agent can open nothing. Add the folder of a project.": "Zatím žádná složka: agent nemůže nic otevřít. Přidejte složku projektu.",
     "No model is available to this account.": "Tomuto účtu není dostupný žádný model.",
@@ -220,6 +227,8 @@ const LEMBAS_I18N = {
     "Pause": "Pozastavit",
     "Pause %(title)s": "Pozastavit %(title)s",
     "Paused": "Pozastaveno",
+    "Pin chat": "Připnout konverzaci",
+    "Pinned chats": "Připnuté konverzace",
     "Plan": "Plán",
     "Plan — changes nothing": "Plan — nic nemění",
     "Preview": "Náhled",
@@ -238,6 +247,7 @@ const LEMBAS_I18N = {
     "Remove %(dir)s": "Odebrat %(dir)s",
     "Rename": "Přejmenovat",
     "Rename chat": "Přejmenovat konverzaci",
+    "Rename folder": "Přejmenovat složku",
     "Rename…": "Přejmenovat…",
     "Restore": "Obnovit",
     "Restore chat": "Obnovit konverzaci",
@@ -360,6 +370,7 @@ const LEMBAS_I18N = {
     "Try again": "Zkusit znovu",
     "Type a command or a chat's title": "Napište příkaz nebo název konverzace",
     "Type a folder…": "Zadat složku…",
+    "Unpin chat": "Odepnout konverzaci",
     "Up to %(n)s at once": "Nejvýše %(n)s současně",
     "Wait until the files are sent.": "Počkejte, až se soubory odešlou.",
     "Waiting for a free model": "Čeká na volný model",
@@ -429,6 +440,7 @@ const LEMBAS_I18N = {
     "waiting for a slot": "čeká na volný slot",
     "window unknown": "okno neznámé",
     "working": "pracuje",
+    "“%(name)s” and the folders inside it are deleted. Their chats stay, back in the list.": "„%(name)s“ a složky v ní se smažou. Jejich konverzace zůstanou, zpět v seznamu.",
     "“%(title)s” is deleted on the server, with its messages and files. This cannot be undone.": "„%(title)s“ se smaže na serveru i se svými zprávami a soubory. Nelze to vrátit.",
     "“%(title)s” stops, and its history goes. The chats it wrote stay.": "„%(title)s“ se zastaví a její historie zmizí. Konverzace, které napsala, zůstanou."
   },
@@ -523,10 +535,12 @@ const LEMBAS_I18N = {
     "Copy": "Kopieren",
     "Copy the last command and its output": "Den letzten Befehl und seine Ausgabe kopieren",
     "Counted by the model at the last reply; the categories are estimated.": "Vom Modell bei der letzten Antwort gezählt; die Kategorien sind geschätzt.",
+    "Create": "Erstellen",
     "Cut short here; the whole of it is in the web interface.": "Hier gekürzt; vollständig steht es in der Weboberfläche.",
     "Days": "Tage",
     "Delete": "Löschen",
     "Delete chat": "Chat löschen",
+    "Delete folder": "Ordner löschen",
     "Delete this chat?": "Diesen Chat löschen?",
     "Delete this scheduled task?": "Diese geplante Aufgabe löschen?",
     "Deny": "Ablehnen",
@@ -555,6 +569,7 @@ const LEMBAS_I18N = {
     "Findings": "Erkenntnisse",
     "Finished %(n)s": "Fertig: %(n)s",
     "Folder": "Ordner",
+    "Folder name": "Ordnername",
     "Folder on %(device)s": "Ordner auf %(device)s",
     "Free space": "Freier Platz",
     "Hello": "Hallo",
@@ -596,15 +611,19 @@ const LEMBAS_I18N = {
     "Models": "Modelle",
     "Models for scheduled tasks": "Modelle für geplante Aufgaben",
     "More": "Mehr",
+    "Move to folder…": "In Ordner verschieben…",
     "Never": "Nie",
     "New agent chat": "Neuer Agenten-Chat",
     "New chat": "Neuer Chat",
+    "New folder": "Neuer Ordner",
+    "New folder…": "Neuer Ordner…",
     "New scheduled task": "Neue geplante Aufgabe",
     "Next run": "Nächster Lauf",
     "No archived chats.": "Keine archivierten Chats.",
     "No chat yet. Start one with New chat.": "Noch kein Chat. Beginnen Sie einen mit Neuer Chat.",
     "No day ticked: every day.": "Kein Tag angehakt: jeden Tag.",
     "No files written in this chat yet.": "In diesem Chat wurde noch keine Datei geschrieben.",
+    "No folder": "Kein Ordner",
     "No folder yet: add one under Settings, Project folders.": "Noch kein Ordner: Fügen Sie einen unter Einstellungen, Projektordner hinzu.",
     "No folder yet: the agent can open nothing. Add the folder of a project.": "Noch kein Ordner: Der Agent kann nichts öffnen. Fügen Sie den Ordner eines Projekts hinzu.",
     "No model is available to this account.": "Diesem Konto steht kein Modell zur Verfügung.",
@@ -640,6 +659,8 @@ const LEMBAS_I18N = {
     "Pause": "Pausieren",
     "Pause %(title)s": "%(title)s pausieren",
     "Paused": "Pausiert",
+    "Pin chat": "Chat anheften",
+    "Pinned chats": "Angeheftete Chats",
     "Plan": "Tarif",
     "Plan — changes nothing": "Plan — ändert nichts",
     "Preview": "Vorschau",
@@ -658,6 +679,7 @@ const LEMBAS_I18N = {
     "Remove %(dir)s": "%(dir)s entfernen",
     "Rename": "Umbenennen",
     "Rename chat": "Chat umbenennen",
+    "Rename folder": "Ordner umbenennen",
     "Rename…": "Umbenennen…",
     "Restore": "Wiederherstellen",
     "Restore chat": "Chat wiederherstellen",
@@ -780,6 +802,7 @@ const LEMBAS_I18N = {
     "Try again": "Erneut versuchen",
     "Type a command or a chat's title": "Befehl oder Chat-Titel eingeben",
     "Type a folder…": "Ordner eingeben…",
+    "Unpin chat": "Chat loslösen",
     "Up to %(n)s at once": "Bis zu %(n)s gleichzeitig",
     "Wait until the files are sent.": "Warten Sie, bis die Dateien gesendet sind.",
     "Waiting for a free model": "Wartet auf ein freies Modell",
@@ -849,6 +872,7 @@ const LEMBAS_I18N = {
     "waiting for a slot": "wartet auf einen Platz",
     "window unknown": "Fenster unbekannt",
     "working": "arbeitet",
+    "“%(name)s” and the folders inside it are deleted. Their chats stay, back in the list.": "„%(name)s“ und die Ordner darin werden gelöscht. Ihre Chats bleiben, wieder in der Liste.",
     "“%(title)s” is deleted on the server, with its messages and files. This cannot be undone.": "„%(title)s“ wird auf dem Server gelöscht, mit seinen Nachrichten und Dateien. Das lässt sich nicht rückgängig machen.",
     "“%(title)s” stops, and its history goes. The chats it wrote stay.": "„%(title)s“ hört auf, und ihr Verlauf wird gelöscht. Die Chats, die sie geschrieben hat, bleiben."
   },
@@ -943,10 +967,12 @@ const LEMBAS_I18N = {
     "Copy": "Copiar",
     "Copy the last command and its output": "Copiar el último comando y su salida",
     "Counted by the model at the last reply; the categories are estimated.": "Contado por el modelo en la última respuesta; las categorías son estimaciones.",
+    "Create": "Crear",
     "Cut short here; the whole of it is in the web interface.": "Recortado aquí; completo está en la interfaz web.",
     "Days": "Días",
     "Delete": "Eliminar",
     "Delete chat": "Eliminar chat",
+    "Delete folder": "Eliminar carpeta",
     "Delete this chat?": "¿Eliminar este chat?",
     "Delete this scheduled task?": "¿Eliminar esta tarea programada?",
     "Deny": "Denegar",
@@ -975,6 +1001,7 @@ const LEMBAS_I18N = {
     "Findings": "Hallazgos",
     "Finished %(n)s": "Terminadas: %(n)s",
     "Folder": "Carpeta",
+    "Folder name": "Nombre de la carpeta",
     "Folder on %(device)s": "Carpeta en %(device)s",
     "Free space": "Espacio libre",
     "Hello": "Hola",
@@ -1016,15 +1043,19 @@ const LEMBAS_I18N = {
     "Models": "Modelos",
     "Models for scheduled tasks": "Modelos para tareas programadas",
     "More": "Más",
+    "Move to folder…": "Mover a una carpeta…",
     "Never": "Nunca",
     "New agent chat": "Nuevo chat de agente",
     "New chat": "Nuevo chat",
+    "New folder": "Nueva carpeta",
+    "New folder…": "Nueva carpeta…",
     "New scheduled task": "Nueva tarea programada",
     "Next run": "Próxima ejecución",
     "No archived chats.": "No hay chats archivados.",
     "No chat yet. Start one with New chat.": "Aún no hay chats. Empiece uno con Nuevo chat.",
     "No day ticked: every day.": "Ningún día marcado: todos los días.",
     "No files written in this chat yet.": "Todavía no se ha escrito ningún archivo en este chat.",
+    "No folder": "Sin carpeta",
     "No folder yet: add one under Settings, Project folders.": "Aún no hay carpeta: añada una en Ajustes, Carpetas de proyecto.",
     "No folder yet: the agent can open nothing. Add the folder of a project.": "Aún no hay ninguna carpeta: el agente no puede abrir nada. Añada la carpeta de un proyecto.",
     "No model is available to this account.": "Ningún modelo está disponible para esta cuenta.",
@@ -1060,6 +1091,8 @@ const LEMBAS_I18N = {
     "Pause": "Pausar",
     "Pause %(title)s": "Pausar %(title)s",
     "Paused": "En pausa",
+    "Pin chat": "Fijar chat",
+    "Pinned chats": "Chats fijados",
     "Plan": "Plan",
     "Plan — changes nothing": "Plan — no cambia nada",
     "Preview": "Vista previa",
@@ -1078,6 +1111,7 @@ const LEMBAS_I18N = {
     "Remove %(dir)s": "Quitar %(dir)s",
     "Rename": "Renombrar",
     "Rename chat": "Renombrar chat",
+    "Rename folder": "Renombrar carpeta",
     "Rename…": "Renombrar…",
     "Restore": "Restaurar",
     "Restore chat": "Restaurar chat",
@@ -1200,6 +1234,7 @@ const LEMBAS_I18N = {
     "Try again": "Reintentar",
     "Type a command or a chat's title": "Escriba un comando o el título de un chat",
     "Type a folder…": "Escribir una carpeta…",
+    "Unpin chat": "Dejar de fijar el chat",
     "Up to %(n)s at once": "Hasta %(n)s a la vez",
     "Wait until the files are sent.": "Espere a que se envíen los archivos.",
     "Waiting for a free model": "Esperando un modelo libre",
@@ -1269,6 +1304,7 @@ const LEMBAS_I18N = {
     "waiting for a slot": "esperando una plaza",
     "window unknown": "ventana desconocida",
     "working": "trabajando",
+    "“%(name)s” and the folders inside it are deleted. Their chats stay, back in the list.": "Se eliminan «%(name)s» y las carpetas que contiene. Sus chats se quedan, de vuelta en la lista.",
     "“%(title)s” is deleted on the server, with its messages and files. This cannot be undone.": "«%(title)s» se elimina del servidor, con sus mensajes y archivos. No se puede deshacer.",
     "“%(title)s” stops, and its history goes. The chats it wrote stay.": "«%(title)s» se detiene y su historial se borra. Los chats que escribió se conservan."
   },
@@ -1363,10 +1399,12 @@ const LEMBAS_I18N = {
     "Copy": "Copier",
     "Copy the last command and its output": "Copier la dernière commande et sa sortie",
     "Counted by the model at the last reply; the categories are estimated.": "Compté par le modèle lors de la dernière réponse ; les catégories sont estimées.",
+    "Create": "Créer",
     "Cut short here; the whole of it is in the web interface.": "Tronqué ici ; le tout est dans l'interface web.",
     "Days": "Jours",
     "Delete": "Supprimer",
     "Delete chat": "Supprimer la conversation",
+    "Delete folder": "Supprimer le dossier",
     "Delete this chat?": "Supprimer cette conversation ?",
     "Delete this scheduled task?": "Supprimer cette tâche planifiée ?",
     "Deny": "Refuser",
@@ -1395,6 +1433,7 @@ const LEMBAS_I18N = {
     "Findings": "Constats",
     "Finished %(n)s": "Terminées : %(n)s",
     "Folder": "Dossier",
+    "Folder name": "Nom du dossier",
     "Folder on %(device)s": "Dossier sur %(device)s",
     "Free space": "Espace libre",
     "Hello": "Bonjour",
@@ -1436,15 +1475,19 @@ const LEMBAS_I18N = {
     "Models": "Modèles",
     "Models for scheduled tasks": "Modèles pour les tâches planifiées",
     "More": "Plus",
+    "Move to folder…": "Déplacer dans un dossier…",
     "Never": "Jamais",
     "New agent chat": "Nouvelle discussion d'agent",
     "New chat": "Nouvelle conversation",
+    "New folder": "Nouveau dossier",
+    "New folder…": "Nouveau dossier…",
     "New scheduled task": "Nouvelle tâche planifiée",
     "Next run": "Prochaine exécution",
     "No archived chats.": "Aucune conversation archivée.",
     "No chat yet. Start one with New chat.": "Aucune conversation pour l’instant. Commencez-en une avec Nouvelle conversation.",
     "No day ticked: every day.": "Aucun jour coché : tous les jours.",
     "No files written in this chat yet.": "Aucun fichier n’a encore été écrit dans cette conversation.",
+    "No folder": "Aucun dossier",
     "No folder yet: add one under Settings, Project folders.": "Aucun dossier pour l'instant : ajoutez-en un dans Paramètres, Dossiers de projet.",
     "No folder yet: the agent can open nothing. Add the folder of a project.": "Aucun dossier pour l'instant : l'agent ne peut rien ouvrir. Ajoutez le dossier d'un projet.",
     "No model is available to this account.": "Aucun modèle n'est disponible pour ce compte.",
@@ -1480,6 +1523,8 @@ const LEMBAS_I18N = {
     "Pause": "Mettre en pause",
     "Pause %(title)s": "Mettre %(title)s en pause",
     "Paused": "En pause",
+    "Pin chat": "Épingler la discussion",
+    "Pinned chats": "Discussions épinglées",
     "Plan": "Forfait",
     "Plan — changes nothing": "Plan — ne change rien",
     "Preview": "Aperçu",
@@ -1498,6 +1543,7 @@ const LEMBAS_I18N = {
     "Remove %(dir)s": "Retirer %(dir)s",
     "Rename": "Renommer",
     "Rename chat": "Renommer la conversation",
+    "Rename folder": "Renommer le dossier",
     "Rename…": "Renommer…",
     "Restore": "Restaurer",
     "Restore chat": "Restaurer la conversation",
@@ -1620,6 +1666,7 @@ const LEMBAS_I18N = {
     "Try again": "Réessayer",
     "Type a command or a chat's title": "Tapez une commande ou le titre d'une conversation",
     "Type a folder…": "Saisir un dossier…",
+    "Unpin chat": "Désépingler la discussion",
     "Up to %(n)s at once": "Jusqu’à %(n)s à la fois",
     "Wait until the files are sent.": "Attendez que les fichiers soient envoyés.",
     "Waiting for a free model": "En attente d’un modèle libre",
@@ -1689,6 +1736,7 @@ const LEMBAS_I18N = {
     "waiting for a slot": "attend une place",
     "window unknown": "fenêtre inconnue",
     "working": "au travail",
+    "“%(name)s” and the folders inside it are deleted. Their chats stay, back in the list.": "« %(name)s » et les dossiers qu’il contient sont supprimés. Leurs conversations restent, de retour dans la liste.",
     "“%(title)s” is deleted on the server, with its messages and files. This cannot be undone.": "« %(title)s » est supprimée du serveur, avec ses messages et ses fichiers. C'est définitif.",
     "“%(title)s” stops, and its history goes. The chats it wrote stay.": "« %(title)s » s’arrête et son historique disparaît. Les conversations qu’elle a écrites restent."
   },
@@ -1783,10 +1831,12 @@ const LEMBAS_I18N = {
     "Copy": "Másolás",
     "Copy the last command and its output": "Az utolsó parancs és kimenetének másolása",
     "Counted by the model at the last reply; the categories are estimated.": "A modell számolta az utolsó válasznál; a kategóriák becslések.",
+    "Create": "Létrehozás",
     "Cut short here; the whole of it is in the web interface.": "Itt rövidítve; a teljes a webes felületen van.",
     "Days": "Napok",
     "Delete": "Törlés",
     "Delete chat": "Csevegés törlése",
+    "Delete folder": "Mappa törlése",
     "Delete this chat?": "Törli ezt a csevegést?",
     "Delete this scheduled task?": "Törli ezt az ütemezett feladatot?",
     "Deny": "Elutasítás",
@@ -1815,6 +1865,7 @@ const LEMBAS_I18N = {
     "Findings": "Megállapítások",
     "Finished %(n)s": "Kész: %(n)s",
     "Folder": "Mappa",
+    "Folder name": "Mappa neve",
     "Folder on %(device)s": "Mappa ezen: %(device)s",
     "Free space": "Szabad hely",
     "Hello": "Üdv",
@@ -1856,15 +1907,19 @@ const LEMBAS_I18N = {
     "Models": "Modellek",
     "Models for scheduled tasks": "Modellek az ütemezett feladatokhoz",
     "More": "Több",
+    "Move to folder…": "Áthelyezés mappába…",
     "Never": "Soha",
     "New agent chat": "Új ügynökcsevegés",
     "New chat": "Új csevegés",
+    "New folder": "Új mappa",
+    "New folder…": "Új mappa…",
     "New scheduled task": "Új ütemezett feladat",
     "Next run": "Következő futás",
     "No archived chats.": "Nincs archivált beszélgetés.",
     "No chat yet. Start one with New chat.": "Még nincs beszélgetés. Indítson egyet az Új beszélgetés gombbal.",
     "No day ticked: every day.": "Ha egy nap sincs bejelölve: minden nap.",
     "No files written in this chat yet.": "Ebben a csevegésben még nem íródott fájl.",
+    "No folder": "Nincs mappa",
     "No folder yet: add one under Settings, Project folders.": "Még nincs mappa: adjon hozzá egyet a Beállítások, Projektmappák alatt.",
     "No folder yet: the agent can open nothing. Add the folder of a project.": "Még nincs mappa: az ügynök semmit nem nyithat meg. Adja hozzá egy projekt mappáját.",
     "No model is available to this account.": "Ennek a fióknak nem érhető el modell.",
@@ -1900,6 +1955,8 @@ const LEMBAS_I18N = {
     "Pause": "Szüneteltetés",
     "Pause %(title)s": "%(title)s szüneteltetése",
     "Paused": "Szüneteltetve",
+    "Pin chat": "Beszélgetés kitűzése",
+    "Pinned chats": "Kitűzött beszélgetések",
     "Plan": "Csomag",
     "Plan — changes nothing": "Plan — semmit nem változtat",
     "Preview": "Előnézet",
@@ -1918,6 +1975,7 @@ const LEMBAS_I18N = {
     "Remove %(dir)s": "%(dir)s eltávolítása",
     "Rename": "Átnevezés",
     "Rename chat": "Csevegés átnevezése",
+    "Rename folder": "Mappa átnevezése",
     "Rename…": "Átnevezés…",
     "Restore": "Visszaállítás",
     "Restore chat": "Csevegés visszaállítása",
@@ -2040,6 +2098,7 @@ const LEMBAS_I18N = {
     "Try again": "Újrapróbálás",
     "Type a command or a chat's title": "Írjon be egy parancsot vagy egy csevegés címét",
     "Type a folder…": "Mappa megadása…",
+    "Unpin chat": "Kitűzés megszüntetése",
     "Up to %(n)s at once": "Legfeljebb %(n)s egyszerre",
     "Wait until the files are sent.": "Várjon, amíg a fájlok elküldődnek.",
     "Waiting for a free model": "Szabad modellre vár",
@@ -2109,6 +2168,7 @@ const LEMBAS_I18N = {
     "waiting for a slot": "szabad helyre vár",
     "window unknown": "az ablak ismeretlen",
     "working": "dolgozik",
+    "“%(name)s” and the folders inside it are deleted. Their chats stay, back in the list.": "A(z) „%(name)s” és a benne lévő mappák törlődnek. A beszélgetéseik megmaradnak, vissza a listába.",
     "“%(title)s” is deleted on the server, with its messages and files. This cannot be undone.": "„%(title)s” törlődik a szerverről, az üzeneteivel és fájljaival együtt. Ez nem vonható vissza.",
     "“%(title)s” stops, and its history goes. The chats it wrote stay.": "„%(title)s” leáll, és az előzményei törlődnek. Az általa írt beszélgetések megmaradnak."
   },
@@ -2203,10 +2263,12 @@ const LEMBAS_I18N = {
     "Copy": "Copia",
     "Copy the last command and its output": "Copia l'ultimo comando e il suo output",
     "Counted by the model at the last reply; the categories are estimated.": "Contato dal modello all’ultima risposta; le categorie sono stime.",
+    "Create": "Crea",
     "Cut short here; the whole of it is in the web interface.": "Troncato qui; il resto è nell'interfaccia web.",
     "Days": "Giorni",
     "Delete": "Elimina",
     "Delete chat": "Elimina chat",
+    "Delete folder": "Elimina cartella",
     "Delete this chat?": "Eliminare questa chat?",
     "Delete this scheduled task?": "Eliminare questa attività pianificata?",
     "Deny": "Nega",
@@ -2235,6 +2297,7 @@ const LEMBAS_I18N = {
     "Findings": "Risultati",
     "Finished %(n)s": "Terminate: %(n)s",
     "Folder": "Cartella",
+    "Folder name": "Nome della cartella",
     "Folder on %(device)s": "Cartella su %(device)s",
     "Free space": "Spazio libero",
     "Hello": "Ciao",
@@ -2276,15 +2339,19 @@ const LEMBAS_I18N = {
     "Models": "Modelli",
     "Models for scheduled tasks": "Modelli per le attività pianificate",
     "More": "Altro",
+    "Move to folder…": "Sposta in una cartella…",
     "Never": "Mai",
     "New agent chat": "Nuova chat con agente",
     "New chat": "Nuova chat",
+    "New folder": "Nuova cartella",
+    "New folder…": "Nuova cartella…",
     "New scheduled task": "Nuova attività pianificata",
     "Next run": "Prossima esecuzione",
     "No archived chats.": "Nessuna chat archiviata.",
     "No chat yet. Start one with New chat.": "Ancora nessuna chat. Iniziane una con Nuova chat.",
     "No day ticked: every day.": "Nessun giorno spuntato: ogni giorno.",
     "No files written in this chat yet.": "In questa chat non è ancora stato scritto alcun file.",
+    "No folder": "Nessuna cartella",
     "No folder yet: add one under Settings, Project folders.": "Nessuna cartella ancora: ne aggiunga una in Impostazioni, Cartelle di progetto.",
     "No folder yet: the agent can open nothing. Add the folder of a project.": "Ancora nessuna cartella: l'agente non può aprire nulla. Aggiungi la cartella di un progetto.",
     "No model is available to this account.": "Nessun modello è disponibile per questo account.",
@@ -2320,6 +2387,8 @@ const LEMBAS_I18N = {
     "Pause": "Metti in pausa",
     "Pause %(title)s": "Metti in pausa %(title)s",
     "Paused": "In pausa",
+    "Pin chat": "Fissa la chat",
+    "Pinned chats": "Chat fissate",
     "Plan": "Piano",
     "Plan — changes nothing": "Plan — non cambia nulla",
     "Preview": "Anteprima",
@@ -2338,6 +2407,7 @@ const LEMBAS_I18N = {
     "Remove %(dir)s": "Rimuovi %(dir)s",
     "Rename": "Rinomina",
     "Rename chat": "Rinomina chat",
+    "Rename folder": "Rinomina cartella",
     "Rename…": "Rinomina…",
     "Restore": "Ripristina",
     "Restore chat": "Ripristina chat",
@@ -2460,6 +2530,7 @@ const LEMBAS_I18N = {
     "Try again": "Riprova",
     "Type a command or a chat's title": "Digiti un comando o il titolo di una chat",
     "Type a folder…": "Digita una cartella…",
+    "Unpin chat": "Togli la chat dalle fissate",
     "Up to %(n)s at once": "Fino a %(n)s alla volta",
     "Wait until the files are sent.": "Attenda che i file siano inviati.",
     "Waiting for a free model": "In attesa di un modello libero",
@@ -2529,6 +2600,7 @@ const LEMBAS_I18N = {
     "waiting for a slot": "in attesa di un posto",
     "window unknown": "finestra sconosciuta",
     "working": "al lavoro",
+    "“%(name)s” and the folders inside it are deleted. Their chats stay, back in the list.": "«%(name)s» e le cartelle al suo interno vengono eliminate. Le loro chat restano, di nuovo nell’elenco.",
     "“%(title)s” is deleted on the server, with its messages and files. This cannot be undone.": "«%(title)s» viene eliminata dal server, con i suoi messaggi e file. Non si può annullare.",
     "“%(title)s” stops, and its history goes. The chats it wrote stay.": "«%(title)s» si ferma e la sua cronologia viene eliminata. Le chat che ha scritto restano."
   },
@@ -2623,10 +2695,12 @@ const LEMBAS_I18N = {
     "Copy": "Kopiuj",
     "Copy the last command and its output": "Kopiuj ostatnie polecenie i jego wynik",
     "Counted by the model at the last reply; the categories are estimated.": "Policzone przez model przy ostatniej odpowiedzi; kategorie są szacunkowe.",
+    "Create": "Utwórz",
     "Cut short here; the whole of it is in the web interface.": "Tu skrócone; całość jest w interfejsie WWW.",
     "Days": "Dni",
     "Delete": "Usuń",
     "Delete chat": "Usuń czat",
+    "Delete folder": "Usuń folder",
     "Delete this chat?": "Usunąć ten czat?",
     "Delete this scheduled task?": "Usunąć to zaplanowane zadanie?",
     "Deny": "Odrzuć",
@@ -2655,6 +2729,7 @@ const LEMBAS_I18N = {
     "Findings": "Ustalenia",
     "Finished %(n)s": "Zakończone: %(n)s",
     "Folder": "Folder",
+    "Folder name": "Nazwa folderu",
     "Folder on %(device)s": "Folder na %(device)s",
     "Free space": "Wolne miejsce",
     "Hello": "Cześć",
@@ -2696,15 +2771,19 @@ const LEMBAS_I18N = {
     "Models": "Modele",
     "Models for scheduled tasks": "Modele dla zaplanowanych zadań",
     "More": "Więcej",
+    "Move to folder…": "Przenieś do folderu…",
     "Never": "Nigdy",
     "New agent chat": "Nowy czat z agentem",
     "New chat": "Nowy czat",
+    "New folder": "Nowy folder",
+    "New folder…": "Nowy folder…",
     "New scheduled task": "Nowe zaplanowane zadanie",
     "Next run": "Następne uruchomienie",
     "No archived chats.": "Brak zarchiwizowanych czatów.",
     "No chat yet. Start one with New chat.": "Jeszcze nie ma czatu. Zacznij go przyciskiem Nowy czat.",
     "No day ticked: every day.": "Żaden dzień niezaznaczony: codziennie.",
     "No files written in this chat yet.": "W tym czacie nie zapisano jeszcze żadnego pliku.",
+    "No folder": "Bez folderu",
     "No folder yet: add one under Settings, Project folders.": "Jeszcze nie ma folderu: dodaj go w Ustawieniach, Foldery projektów.",
     "No folder yet: the agent can open nothing. Add the folder of a project.": "Nie ma jeszcze folderu: agent nie może nic otworzyć. Dodaj folder projektu.",
     "No model is available to this account.": "Dla tego konta nie jest dostępny żaden model.",
@@ -2740,6 +2819,8 @@ const LEMBAS_I18N = {
     "Pause": "Wstrzymaj",
     "Pause %(title)s": "Wstrzymaj %(title)s",
     "Paused": "Wstrzymany",
+    "Pin chat": "Przypnij czat",
+    "Pinned chats": "Przypięte czaty",
     "Plan": "Plan",
     "Plan — changes nothing": "Plan — niczego nie zmienia",
     "Preview": "Podgląd",
@@ -2758,6 +2839,7 @@ const LEMBAS_I18N = {
     "Remove %(dir)s": "Usuń %(dir)s",
     "Rename": "Zmień nazwę",
     "Rename chat": "Zmień nazwę czatu",
+    "Rename folder": "Zmień nazwę folderu",
     "Rename…": "Zmień nazwę…",
     "Restore": "Przywróć",
     "Restore chat": "Przywróć czat",
@@ -2880,6 +2962,7 @@ const LEMBAS_I18N = {
     "Try again": "Spróbuj ponownie",
     "Type a command or a chat's title": "Wpisz polecenie lub tytuł czatu",
     "Type a folder…": "Wpisz folder…",
+    "Unpin chat": "Odepnij czat",
     "Up to %(n)s at once": "Do %(n)s naraz",
     "Wait until the files are sent.": "Poczekaj, aż pliki zostaną wysłane.",
     "Waiting for a free model": "Czeka na wolny model",
@@ -2949,6 +3032,7 @@ const LEMBAS_I18N = {
     "waiting for a slot": "czeka na wolne miejsce",
     "window unknown": "okno nieznane",
     "working": "pracuje",
+    "“%(name)s” and the folders inside it are deleted. Their chats stay, back in the list.": "„%(name)s” i foldery w nim zostaną usunięte. Ich czaty zostaną, z powrotem na liście.",
     "“%(title)s” is deleted on the server, with its messages and files. This cannot be undone.": "„%(title)s” zostanie usunięty z serwera wraz z wiadomościami i plikami. Tego nie można cofnąć.",
     "“%(title)s” stops, and its history goes. The chats it wrote stay.": "„%(title)s” zatrzyma się, a jego historia zniknie. Czaty, które napisało, zostaną."
   },
@@ -3043,10 +3127,12 @@ const LEMBAS_I18N = {
     "Copy": "Kopírovať",
     "Copy the last command and its output": "Skopírovať posledný príkaz a jeho výstup",
     "Counted by the model at the last reply; the categories are estimated.": "Spočítal model pri poslednej odpovedi; kategórie sú odhadnuté.",
+    "Create": "Vytvoriť",
     "Cut short here; the whole of it is in the web interface.": "Tu skrátené; celé je to vo webovom rozhraní.",
     "Days": "Dni",
     "Delete": "Zmazať",
     "Delete chat": "Zmazať konverzáciu",
+    "Delete folder": "Zmazať zložku",
     "Delete this chat?": "Zmazať túto konverzáciu?",
     "Delete this scheduled task?": "Odstrániť túto naplánovanú úlohu?",
     "Deny": "Odmietnuť",
@@ -3075,6 +3161,7 @@ const LEMBAS_I18N = {
     "Findings": "Zistenia",
     "Finished %(n)s": "Dokončené: %(n)s",
     "Folder": "Priečinok",
+    "Folder name": "Názov zložky",
     "Folder on %(device)s": "Priečinok na zariadení %(device)s",
     "Free space": "Voľné miesto",
     "Hello": "Dobrý deň",
@@ -3116,15 +3203,19 @@ const LEMBAS_I18N = {
     "Models": "Modely",
     "Models for scheduled tasks": "Modely pre naplánované úlohy",
     "More": "Viac",
+    "Move to folder…": "Presunúť do priečinka…",
     "Never": "Nikdy",
     "New agent chat": "Nová agentská konverzácia",
     "New chat": "Nová konverzácia",
+    "New folder": "Nová zložka",
+    "New folder…": "Nový priečinok…",
     "New scheduled task": "Nová naplánovaná úloha",
     "Next run": "Ďalšie spustenie",
     "No archived chats.": "Žiadne archivované konverzácie.",
     "No chat yet. Start one with New chat.": "Zatiaľ žiadna konverzácia. Začnite ju tlačidlom Nová konverzácia.",
     "No day ticked: every day.": "Žiadny deň nezaškrtnutý: každý deň.",
     "No files written in this chat yet.": "V tomto chate sa zatiaľ nezapísal žiadny súbor.",
+    "No folder": "Bez zložky",
     "No folder yet: add one under Settings, Project folders.": "Zatiaľ žiadny priečinok: pridajte ho v Nastaveniach, Priečinky projektov.",
     "No folder yet: the agent can open nothing. Add the folder of a project.": "Zatiaľ žiadny priečinok: agent nemôže nič otvoriť. Pridajte priečinok projektu.",
     "No model is available to this account.": "Tomuto účtu nie je dostupný žiadny model.",
@@ -3160,6 +3251,8 @@ const LEMBAS_I18N = {
     "Pause": "Pozastaviť",
     "Pause %(title)s": "Pozastaviť %(title)s",
     "Paused": "Pozastavené",
+    "Pin chat": "Pripnúť konverzáciu",
+    "Pinned chats": "Pripnuté konverzácie",
     "Plan": "Plán",
     "Plan — changes nothing": "Plan — nič nemení",
     "Preview": "Náhľad",
@@ -3178,6 +3271,7 @@ const LEMBAS_I18N = {
     "Remove %(dir)s": "Odstrániť %(dir)s",
     "Rename": "Premenovať",
     "Rename chat": "Premenovať konverzáciu",
+    "Rename folder": "Premenovať zložku",
     "Rename…": "Premenovať…",
     "Restore": "Obnoviť",
     "Restore chat": "Obnoviť konverzáciu",
@@ -3300,6 +3394,7 @@ const LEMBAS_I18N = {
     "Try again": "Skúsiť znova",
     "Type a command or a chat's title": "Napíšte príkaz alebo názov konverzácie",
     "Type a folder…": "Zadať priečinok…",
+    "Unpin chat": "Odopnúť konverzáciu",
     "Up to %(n)s at once": "Najviac %(n)s naraz",
     "Wait until the files are sent.": "Počkajte, kým sa súbory odošlú.",
     "Waiting for a free model": "Čaká na voľný model",
@@ -3369,6 +3464,7 @@ const LEMBAS_I18N = {
     "waiting for a slot": "čaká na voľný slot",
     "window unknown": "okno neznáme",
     "working": "pracuje",
+    "“%(name)s” and the folders inside it are deleted. Their chats stay, back in the list.": "„%(name)s“ a priečinky v ňom sa zmažú. Ich konverzácie zostanú, späť v zozname.",
     "“%(title)s” is deleted on the server, with its messages and files. This cannot be undone.": "„%(title)s“ sa zmaže na serveri aj so svojimi správami a súbormi. Nedá sa to vrátiť.",
     "“%(title)s” stops, and its history goes. The chats it wrote stay.": "„%(title)s“ sa zastaví a jej história zmizne. Konverzácie, ktoré napísala, zostanú."
   }
diff --git a/ui/js/chat.js b/ui/js/chat.js
index 16b1869..8f3b138 100644
--- a/ui/js/chat.js
+++ b/ui/js/chat.js
@@ -17,7 +17,7 @@ import { avatar, agentsControl, teamPossible, namedOnly, subagentsCap, noteSubag
 import { readyIds, sending, sent, discard } from "./attach.js"
 import { watchActivity, activityChanged, planList, activityButton, treeChanged } from "./activity.js"
 import { agentBlock, agentReady, agentState, onAgentChange } from "./agent.js"
-import { folderName, listed } from "./list.js"
+import { folderName, listed, folderTree, newFolder } from "./list.js"
 import { unarchive } from "./archived.js"
 import { isProgress, progressLine, progressTicks } from "./progress.js"
 import { aimTerminal, terminalButton, terminalOpen, toggleTerminal } from "./terminal.js"
@@ -1033,6 +1033,10 @@ export function chatMenu(anchor, chat) {
   const base = ctx.status()?.server
   const mayDelete = ctx.me()?.permissions?.["chat.delete"] !== false
   const items = [{ label: t("Rename…"), run: () => renameChat(chat) }]
+  if (!chat.archived) {
+    items.push({ label: chat.pinned ? t("Unpin chat") : t("Pin chat"), run: () => setChat(chat, { pinned: !chat.pinned }) })
+    items.push({ label: t("Move to folder…"), run: () => moveMenu(anchor, chat) })
+  }
   if (chat.kind === "agent" && chat.device_session_id) items.push({ label: t("Continue in a terminal…"), run: () => continueInTerminal(chat) })
   if (base) items.push({ label: t("Open in the web interface"), run: () => openLink(`${base}/chat/${encodeURIComponent(chat.id)}`) })
   items.push(null, chat.archived ? { label: t("Restore chat"), run: () => unarchiveChat(chat) } : { label: t("Archive chat"), run: () => archiveChat(chat) })
@@ -1068,6 +1072,34 @@ export async function continueInTerminal(chat) {
   })
 }
 
+/** Where a chat can go: no folder, any of the account's, or a new one. */
+function moveMenu(anchor, chat) {
+  const here = chat.folder_id || ""
+  menu(anchor, [
+    { label: t("No folder"), checked: !here, run: () => here && setChat(chat, { folder_id: null }) },
+    ...folderTree().map(({ folder, depth }) => ({ label: `${"\u2003".repeat(depth)}${folder.name}`, checked: folder.id === here, run: () => folder.id !== here && setChat(chat, { folder_id: folder.id }) })),
+    null,
+    {
+      label: t("New folder…"),
+      run: async () => {
+        const id = await newFolder()
+        if (id) setChat(chat, { folder_id: id })
+      },
+    },
+  ])
+}
+
+/** A change to a chat from its menu (pinned, its folder): the list drawn again from the server. */
+async function setChat(chat, body) {
+  try {
+    const r = await patch(`/chats/${encodeURIComponent(chat.id)}`, body)
+    if (open?.chat?.id === chat.id && r?.chat) open.chat = r.chat
+    ctx.changed(r?.chat)
+  } catch (err) {
+    alertIn(why(err))
+  }
+}
+
 async function renameChat(chat) {
   const title = await ask({ title: t("Rename chat"), value: chat.title || "", ok: t("Rename"), cancel: t("Cancel") })
   if (!title || title === chat.title) return
diff --git a/ui/js/list.js b/ui/js/list.js
index 03435c7..b16fe2a 100644
--- a/ui/js/list.js
+++ b/ui/js/list.js
@@ -1,15 +1,23 @@
-// The sidebar's chats: agent chats and chats on the server in one list, newest first, under
-// Today and Earlier. An agent chat carries the agent's mark and its folder's name; one that works
-// on another device of the account says so in its title. The search line above narrows the list
-// by title (and an agent chat by its folder) as it is typed; Ctrl+K searches everything.
+// The sidebar's chats: agent chats and chats on the server in one list, newest first. The
+// pinned ones first, then the account's chat folders (`GET /folders`, nested, each folding as the
+// server keeps it), then the rest under Today and Earlier. An agent chat carries the agent's mark
+// and its project folder's name; one that works on another device of the account says so in its
+// title. The search line above narrows the list by title (and an agent chat by its folder) as it
+// is typed, flat; Ctrl+K searches everything.
+//
+// Folders are made, renamed and deleted here (`POST/PATCH/DELETE /folders`); a chat is pinned and
+// moved from its own menu (`PATCH /chats/{id}` `pinned`, `folder_id`). Deleting a folder never
+// deletes a chat: its chats go back to the list.
 
 import { $, h, clear, append, icon, ICONS } from "./dom.js"
-import { get, why } from "./bridge.js"
+import { get, post, patch, del, why } from "./bridge.js"
+import { menu, ask } from "./popup.js"
 
-let ctx = null // { thisDevices(), open(id, kind), current(), menu(anchor, chat) }
+let ctx = null // { thisDevices(), open(id, kind), current(), menu(anchor, chat), note(text) }
 let rows = []
 let more = false
 let query = ""
+let folders = [] // { id, name, parent_id, collapsed, position }
 
 /** Lower case, without diacritics: "Príliš" is found by "prilis". */
 function fold(text) {
@@ -22,9 +30,10 @@ function fold(text) {
 /** The list again, from the server. */
 export async function refreshList() {
   try {
-    const r = await get("/chats?limit=50")
+    const [r, f] = await Promise.all([get("/chats?limit=50"), get("/folders").catch(() => ({ folders: [] }))])
     rows = r.chats || []
     more = !!r.more
+    folders = f.folders || []
     render()
   } catch (err) {
     clear($("chat-list")).append(h("li", { class: "list__note is-error", text: why(err) }))
@@ -77,6 +86,108 @@ function row(c) {
   return h("li", null, b)
 }
 
+/** A folder's head: it folds and unfolds; its menu renames it, makes one inside, deletes it. */
+function folderHead(f, depth, count) {
+  const open = !f.collapsed
+  const head = h(
+    "button",
+    {
+      type: "button",
+      class: "folderrow",
+      dataset: { folder: f.id },
+      style: depth ? `--depth: ${depth}` : null,
+      "aria-expanded": String(open),
+      title: f.name,
+      onclick: () => foldFolder(f, !f.collapsed),
+    },
+    h("span", { class: "folderrow__chev" }, icon(open ? ICONS.chevronDown : ICONS.chevron)),
+    h("span", { class: "folderrow__icon" }, icon(ICONS.folder)),
+    h("span", { class: "folderrow__name", text: f.name }),
+    h("span", { class: "folderrow__count", text: count ? String(count) : "" }),
+  )
+  head.addEventListener("contextmenu", (e) => {
+    e.preventDefault()
+    folderMenu(e.clientX || e.clientY ? { x: e.clientX, y: e.clientY } : head, f)
+  })
+  const more = h("button", { type: "button", class: "folderrow__more", "aria-label": t("More"), title: t("More"), onclick: (e) => folderMenu(e.currentTarget, f) }, icon(ICONS.more))
+  return h("li", { class: "list__folder" }, head, more)
+}
+
+async function foldFolder(f, collapsed) {
+  f.collapsed = collapsed
+  render()
+  try {
+    await patch(`/folders/${encodeURIComponent(f.id)}`, { collapsed })
+  } catch {
+    // Folding is the sidebar's own business: drawn as asked even where the server did not keep it.
+  }
+}
+
+function folderMenu(anchor, f) {
+  menu(anchor, [
+    { label: t("Rename folder"), run: () => renameFolder(f) },
+    { label: t("New folder"), run: () => newFolder(f.id) },
+    null,
+    { label: t("Delete folder"), danger: true, run: () => deleteFolder(f) },
+  ])
+}
+
+/** A new folder, at the top level or inside `parent`: its id once made, else "". */
+export async function newFolder(parent = "") {
+  const name = await ask({ title: t("New folder"), text: t("Folder name"), value: "", ok: t("Create"), cancel: t("Cancel") })
+  if (!name) return ""
+  try {
+    const r = await post("/folders", parent ? { name, parent_id: parent } : { name })
+    await refreshList()
+    return r.folder?.id || ""
+  } catch (err) {
+    ctx.note?.(why(err))
+    return ""
+  }
+}
+
+async function renameFolder(f) {
+  const name = await ask({ title: t("Rename folder"), text: t("Folder name"), value: f.name, ok: t("Rename"), cancel: t("Cancel") })
+  if (!name || name === f.name) return
+  try {
+    await patch(`/folders/${encodeURIComponent(f.id)}`, { name })
+    await refreshList()
+  } catch (err) {
+    ctx.note?.(why(err))
+  }
+}
+
+async function deleteFolder(f) {
+  const ok = await ask({ title: t("Delete folder"), text: t("“%(name)s” and the folders inside it are deleted. Their chats stay, back in the list.", { name: f.name }), ok: t("Delete"), cancel: t("Cancel"), danger: true })
+  if (!ok) return
+  try {
+    await del(`/folders/${encodeURIComponent(f.id)}`)
+    await refreshList()
+  } catch (err) {
+    ctx.note?.(why(err))
+  }
+}
+
+/** The account's chat folders, as the list last read them. */
+export function listedFolders() {
+  return folders
+}
+
+/** The folders as a tree, depth first, each with its depth: what a menu of them lists. */
+export function folderTree() {
+  const out = []
+  const known = new Set(folders.map((f) => f.id))
+  const walk = (parent, depth) => {
+    const kids = folders.filter((f) => (f.parent_id && known.has(f.parent_id) ? f.parent_id : null) === parent).sort((a, b) => (a.position ?? 0) - (b.position ?? 0) || a.name.localeCompare(b.name))
+    for (const f of kids) {
+      out.push({ folder: f, depth })
+      walk(f.id, depth + 1)
+    }
+  }
+  walk(null, 0)
+  return out
+}
+
 function isToday(stamp) {
   const d = new Date(stamp)
   if (Number.isNaN(d.getTime())) return false
@@ -98,8 +209,44 @@ function render() {
     list.append(h("li", { class: "list__note", text: words.length ? t("Nothing matches.") : t("No chat yet. Start one with New chat.") }))
     return
   }
-  const today = visible.filter((r) => isToday(r.updated_at))
-  const earlier = visible.filter((r) => !isToday(r.updated_at))
+  // Searching: every match, flat. Otherwise the pinned first, then the folders, then the rest.
+  let rest = visible
+  if (!words.length) {
+    const pinned = visible.filter((r) => r.pinned)
+    if (pinned.length) append(list, [h("li", { class: "list__head", text: t("Pinned chats") }), pinned.map(row)])
+    const known = new Set(folders.map((f) => f.id))
+    const filed = (r) => !r.pinned && r.folder_id && known.has(r.folder_id)
+    const tree = folderTree()
+    if (tree.length) {
+      const inside = (id) => {
+        // A folder's count: its own chats and those of the folders inside it.
+        const ids = new Set([id])
+        for (const { folder } of tree) if (folder.parent_id && ids.has(folder.parent_id)) ids.add(folder.id)
+        return visible.filter((r) => filed(r) && ids.has(r.folder_id)).length
+      }
+      const hidden = new Set() // folders under a folded one
+      for (const { folder, depth } of tree) {
+        if (folder.parent_id && hidden.has(folder.parent_id)) {
+          hidden.add(folder.id)
+          continue
+        }
+        list.append(folderHead(folder, depth, inside(folder.id)))
+        if (folder.collapsed) {
+          hidden.add(folder.id)
+          continue
+        }
+        for (const r of visible.filter((x) => filed(x) && x.folder_id === folder.id)) {
+          const li = row(r)
+          li.firstChild.style.setProperty("--depth", String(depth + 1))
+          li.firstChild.classList.add("is-filed")
+          list.append(li)
+        }
+      }
+    }
+    rest = visible.filter((r) => !r.pinned && !filed(r))
+  }
+  const today = rest.filter((r) => isToday(r.updated_at))
+  const earlier = rest.filter((r) => !isToday(r.updated_at))
   if (today.length) append(list, [h("li", { class: "list__head", text: t("Today") }), today.map(row)])
   if (earlier.length) append(list, [h("li", { class: "list__head", text: t("Earlier") }), earlier.map(row)])
   if (more && !words.length) list.append(h("li", null, h("button", { type: "button", class: "btn btn--sm list__more", text: t("More"), onclick: loadMore })))
diff --git a/ui/js/main.js b/ui/js/main.js
index edaf79b..29da112 100644
--- a/ui/js/main.js
+++ b/ui/js/main.js
@@ -267,6 +267,10 @@ async function boot() {
       showChat(id)
     },
     menu: (anchor, c) => chatMenu(anchor, c),
+    note: (text) => {
+      $("thread-note").textContent = text
+      $("thread-note").hidden = !text
+    },
   })
   initChat({
     status: () => status,