diff --git a/apps/web/src/app.css b/apps/web/src/app.css
index 7180f16d5..5ee0832aa 100644
--- a/apps/web/src/app.css
+++ b/apps/web/src/app.css
@@ -4195,3 +4195,159 @@ tr.insights-row-clickable:hover {
     grid-template-columns: 1fr;
   }
 }
+
+/* Sidebar bottom: profile button, Tools button, account menu. */
+.sb-bottom {
+  display: flex;
+  align-items: center;
+  gap: 8px;
+  padding: 8px 8px 0;
+  margin-top: 6px;
+  border-top: 1px solid var(--line);
+  position: relative;
+}
+.sb-profile {
+  width: 36px;
+  height: 36px;
+  flex: 0 0 36px;
+  border: 0;
+  background: transparent;
+  border-radius: var(--r-md);
+  display: grid;
+  place-items: center;
+  cursor: pointer;
+  transition: background-color 120ms ease;
+}
+.sb-profile:hover {
+  background: var(--hover);
+}
+.sb-tools {
+  flex: 1;
+  height: 36px;
+  border: 0;
+  border-radius: var(--r-md);
+  background: var(--surface);
+  box-shadow: var(--raised);
+  display: inline-flex;
+  align-items: center;
+  justify-content: center;
+  gap: 8px;
+  font: inherit;
+  font-size: 13.5px;
+  font-weight: 700;
+  color: var(--ink);
+  cursor: pointer;
+  transition:
+    box-shadow 150ms ease-out,
+    transform 160ms var(--ease-out);
+}
+.sb-tools:hover {
+  box-shadow: var(--raised-hover);
+}
+.sb-tools:active {
+  transform: scale(0.97);
+}
+.sb-tools[data-active="true"] {
+  box-shadow: 0 0 0 1.5px var(--ink);
+}
+.sb-profile:focus-visible,
+.sb-tools:focus-visible,
+.sb-menu-item:focus-visible,
+.sb-menu-theme button:focus-visible {
+  outline: 2px solid var(--ink);
+  outline-offset: 1px;
+}
+.sb-menu {
+  position: absolute;
+  left: 0;
+  right: 0;
+  bottom: calc(100% + 6px);
+  min-width: 220px;
+  padding: 4px;
+  z-index: 40;
+  background: var(--surface);
+  border-radius: var(--r-lg);
+  box-shadow: var(--floating);
+  transform-origin: bottom left;
+}
+.sb-menu-head {
+  display: flex;
+  align-items: center;
+  gap: 10px;
+  padding: 8px 10px;
+}
+.sb-menu-head b {
+  display: block;
+  font-size: 13.5px;
+  line-height: 1.2;
+}
+.sb-menu-head span {
+  display: block;
+  font-size: 12px;
+  color: var(--ink-3);
+}
+.sb-menu-sep {
+  height: 1px;
+  background: var(--line);
+  margin: 4px 6px;
+}
+.sb-menu-item {
+  display: flex;
+  align-items: center;
+  gap: 10px;
+  width: 100%;
+  height: 34px;
+  border: 0;
+  background: transparent;
+  padding: 0 10px;
+  border-radius: var(--r-md);
+  font: inherit;
+  font-size: 13.5px;
+  text-align: left;
+  color: var(--ink);
+  cursor: pointer;
+}
+.sb-menu-item:hover {
+  background: var(--hover);
+}
+.sb-menu-item svg {
+  width: 1.05rem;
+  height: 1.05rem;
+  color: var(--ink-3);
+}
+.sb-menu-theme {
+  display: grid;
+  grid-template-columns: repeat(3, 1fr);
+  gap: 2px;
+  margin: 4px 6px;
+  padding: 2px;
+  border-radius: var(--r-md);
+  background: var(--hover);
+}
+.sb-menu-theme button {
+  height: 30px;
+  border: 0;
+  border-radius: 6px;
+  background: transparent;
+  display: inline-flex;
+  align-items: center;
+  justify-content: center;
+  gap: 6px;
+  font: inherit;
+  font-size: 12.5px;
+  font-weight: 700;
+  color: var(--ink-3);
+  cursor: pointer;
+}
+.sb-menu-theme button:hover {
+  color: var(--ink);
+}
+.sb-menu-theme button[data-active="true"] {
+  background: var(--surface);
+  color: var(--ink);
+  box-shadow: var(--raised);
+}
+.sb-menu-theme svg {
+  width: 0.9rem;
+  height: 0.9rem;
+}
diff --git a/apps/web/src/lib/icons/index.tsx b/apps/web/src/lib/icons/index.tsx
index bcbe7983f..a86300a01 100644
--- a/apps/web/src/lib/icons/index.tsx
+++ b/apps/web/src/lib/icons/index.tsx
@@ -51,7 +51,9 @@ export {
   MessageCircleMore as ChatCircleDots,
   Mic as Microphone,
   Minimize2 as ArrowsIn,
+  Moon,
   MoonStar as MoonStars,
+  Palette,
   Paperclip,
   Pencil as PencilSimple,
   Pin as PushPin,
@@ -68,6 +70,7 @@ export {
   Square as Stop,
   SquareArrowOutUpRight as ArrowSquareOut,
   Star,
+  Sun,
   TriangleAlert as Warning,
   User,
   UserPlus,
diff --git a/apps/web/src/shell/sidebar-footer.tsx b/apps/web/src/shell/sidebar-footer.tsx
new file mode 100644
index 000000000..20b3b4c6a
--- /dev/null
+++ b/apps/web/src/shell/sidebar-footer.tsx
@@ -0,0 +1,164 @@
+// Profile menu (settings, theme, sign out) and the Tools button.
+
+import { Moon, Palette, Plugs, SignOut, SlidersHorizontal, Sun, type Icon } from "@/lib/icons";
+import { useEffect, useRef, useState, type KeyboardEvent } from "react";
+
+import { IdentityAvatar } from "../chat/avatar";
+import { useSessionUser, useSignOut } from "../navigation";
+import { matchesRoute, SETTINGS_PATH } from "../routes";
+import { isTheme, setTheme, THEMES, useTheme, type Theme } from "../theme-store";
+
+const THEME_OPTIONS: Record<Theme, { readonly label: string; readonly icon: Icon }> = {
+  light: { label: "Light", icon: Sun },
+  dark: { label: "Dark", icon: Moon },
+  canvas: { label: "Canvas", icon: Palette },
+};
+
+export function SidebarFooter({
+  path,
+  onNavigate,
+}: {
+  readonly path: string;
+  readonly onNavigate: (to: string) => void;
+}) {
+  const user = useSessionUser();
+  const onSignOut = useSignOut();
+  const theme = useTheme();
+  const [open, setOpen] = useState(false);
+  const rootRef = useRef<HTMLDivElement>(null);
+  const triggerRef = useRef<HTMLButtonElement>(null);
+  const radioRefs = useRef<Partial<Record<Theme, HTMLButtonElement | null>>>({});
+
+  useEffect(() => {
+    if (!open) return;
+    const onPointerDown = (event: PointerEvent) => {
+      if (event.target instanceof Node && !rootRef.current?.contains(event.target)) setOpen(false);
+    };
+    document.addEventListener("pointerdown", onPointerDown);
+    return () => document.removeEventListener("pointerdown", onPointerDown);
+  }, [open]);
+
+  const close = () => {
+    setOpen(false);
+    triggerRef.current?.focus();
+  };
+
+  const onMenuKeyDown = (event: KeyboardEvent) => {
+    if (event.key === "Escape") {
+      event.stopPropagation();
+      close();
+    }
+  };
+
+  const onRadioKeyDown = (event: KeyboardEvent) => {
+    const step =
+      event.key === "ArrowRight" || event.key === "ArrowDown"
+        ? 1
+        : event.key === "ArrowLeft" || event.key === "ArrowUp"
+          ? -1
+          : 0;
+    if (step === 0) return;
+    event.preventDefault();
+    const next = THEMES[(THEMES.indexOf(theme) + step + THEMES.length) % THEMES.length];
+    if (next === undefined) return;
+    setTheme(next);
+    radioRefs.current[next]?.focus();
+  };
+
+  const name = user?.name ?? "Account";
+  const toolsActive = matchesRoute("/tools", path);
+
+  return (
+    <div className="sb-bottom" ref={rootRef}>
+      <button
+        type="button"
+        ref={triggerRef}
+        className="sb-profile"
+        aria-haspopup="menu"
+        aria-expanded={open}
+        aria-label="Account"
+        onClick={() => setOpen((value) => !value)}
+      >
+        <IdentityAvatar kind="person" name={name} principalId={user?.id ?? name} />
+      </button>
+      <button
+        type="button"
+        className="sb-tools"
+        data-active={toolsActive ? "true" : undefined}
+        aria-current={toolsActive ? "page" : undefined}
+        onClick={() => onNavigate("/tools")}
+      >
+        <Plugs />
+        Tools
+      </button>
+      {open ? (
+        <div className="sb-menu" role="menu" aria-label="Account" onKeyDown={onMenuKeyDown}>
+          <div className="sb-menu-head">
+            <IdentityAvatar kind="person" name={name} principalId={user?.id ?? name} />
+            <div>
+              <b>{name}</b>
+              {user !== undefined ? <span>{user.email}</span> : null}
+            </div>
+          </div>
+          <div className="sb-menu-sep" />
+          <button
+            type="button"
+            role="menuitem"
+            className="sb-menu-item"
+            autoFocus
+            onClick={() => {
+              setOpen(false);
+              onNavigate(SETTINGS_PATH);
+            }}
+          >
+            <SlidersHorizontal />
+            Settings
+          </button>
+          <div className="sb-menu-theme" role="radiogroup" aria-label="Theme">
+            {THEMES.map((key) => {
+              const { label, icon: ThemeIcon } = THEME_OPTIONS[key];
+              const active = theme === key;
+              return (
+                <button
+                  key={key}
+                  type="button"
+                  role="radio"
+                  aria-checked={active}
+                  tabIndex={active ? 0 : -1}
+                  data-active={active ? "true" : undefined}
+                  ref={(node) => {
+                    radioRefs.current[key] = node;
+                  }}
+                  onKeyDown={onRadioKeyDown}
+                  onClick={() => {
+                    if (isTheme(key)) setTheme(key);
+                  }}
+                >
+                  <ThemeIcon />
+                  {label}
+                </button>
+              );
+            })}
+          </div>
+          {onSignOut !== undefined ? (
+            <>
+              <div className="sb-menu-sep" />
+              <button
+                type="button"
+                role="menuitem"
+                className="sb-menu-item"
+                onClick={() => {
+                  setOpen(false);
+                  onSignOut();
+                }}
+              >
+                <SignOut />
+                Sign out
+              </button>
+            </>
+          ) : null}
+        </div>
+      ) : null}
+    </div>
+  );
+}
diff --git a/apps/web/src/shell/sidebar.tsx b/apps/web/src/shell/sidebar.tsx
index 3e8664cf0..6cb787448 100644
--- a/apps/web/src/shell/sidebar.tsx
+++ b/apps/web/src/shell/sidebar.tsx
@@ -9,24 +9,16 @@ import {
   MenuTrigger,
   SidebarPanel,
   SidebarPanelBody,
-  SidebarPanelFooter,
 } from "@corbits/react-ui";
-import {
-  FlowArrow,
-  FolderOpen,
-  Lightning,
-  Plugs,
-  Plus,
-  Robot,
-  SlidersHorizontal,
-} from "@/lib/icons";
+import { Plus } from "@/lib/icons";
 import { useState } from "react";
 
 import { useBench } from "../bench-context";
 import { CreateAgentPanel } from "../pages/create-agent-panel";
 import { AGENTS_PATH_PREFIX } from "../path-ids";
-import { matchesRoute, NEW_WORKBENCH_PATH, SETTINGS_PATH } from "../routes";
+import { NEW_WORKBENCH_PATH } from "../routes";
 import { SidebarBrandMark } from "./brand-mark";
+import { SidebarFooter } from "./sidebar-footer";
 import { WorkbenchList } from "./workbench-list";
 
 export function Sidebar({
@@ -91,74 +83,7 @@ export function Sidebar({
         />
       )}
 
-      <SidebarPanelFooter>
-        {/* Footer order: Artifacts, Skills, Tools, Workflows, Agents, then
-            one Settings row — Insights and the account menu (avatar, name,
-            sign out) now live inside Settings itself, not as separate
-            sidebar affordances. */}
-        <button
-          type="button"
-          className="shell-sidebar-footer-row"
-          data-active={matchesRoute("/artifacts", path) ? "true" : undefined}
-          aria-current={matchesRoute("/artifacts", path) ? "page" : undefined}
-          onClick={() => onNavigate("/artifacts")}
-        >
-          <FolderOpen />
-          <span>Artifacts</span>
-        </button>
-        <button
-          type="button"
-          className="shell-sidebar-footer-row"
-          data-active={matchesRoute("/skills", path) ? "true" : undefined}
-          aria-current={matchesRoute("/skills", path) ? "page" : undefined}
-          onClick={() => onNavigate("/skills")}
-        >
-          <Lightning />
-          <span>Skills</span>
-        </button>
-        <button
-          type="button"
-          className="shell-sidebar-footer-row"
-          data-active={matchesRoute("/tools", path) ? "true" : undefined}
-          aria-current={matchesRoute("/tools", path) ? "page" : undefined}
-          onClick={() => onNavigate("/tools")}
-        >
-          <Plugs />
-          <span>Tools</span>
-        </button>
-        <button
-          type="button"
-          className="shell-sidebar-footer-row"
-          data-active={matchesRoute("/workflows", path) ? "true" : undefined}
-          aria-current={matchesRoute("/workflows", path) ? "page" : undefined}
-          onClick={() => onNavigate("/workflows")}
-        >
-          <FlowArrow />
-          <span>Workflows</span>
-        </button>
-        <button
-          type="button"
-          className="shell-sidebar-footer-row"
-          data-active={matchesRoute("/agents", path) ? "true" : undefined}
-          aria-current={matchesRoute("/agents", path) ? "page" : undefined}
-          onClick={() => onNavigate("/agents")}
-        >
-          <Robot />
-          <span>Agents</span>
-        </button>
-
-        <button
-          type="button"
-          className="shell-sidebar-footer-row"
-          data-active={matchesRoute(SETTINGS_PATH, path) ? "true" : undefined}
-          aria-current={matchesRoute(SETTINGS_PATH, path) ? "page" : undefined}
-          data-tour="settings-button"
-          onClick={() => onNavigate(SETTINGS_PATH)}
-        >
-          <SlidersHorizontal />
-          <span>Settings</span>
-        </button>
-      </SidebarPanelFooter>
+      <SidebarFooter path={path} onNavigate={onNavigate} />
     </SidebarPanel>
   );
 }