fix(ui): hide keyboard hints on phone layout

packages/ui/src/components/hint-row.tsx

@@ -3,10 +3,15 @@ import { Component, JSX } from "solid-js"
 interface HintRowProps {
   children: JSX.Element
   class?: string
+  ariaHidden?: boolean
 }
 
 const HintRow: Component<HintRowProps> = (props) => {
-  return <span class={`text-xs text-muted ${props.class || ""}`}>{props.children}</span>
+  return (
+    <span aria-hidden={props.ariaHidden} class={`text-xs text-muted ${props.class || ""}`}>
+      {props.children}
+    </span>
+  )
 }
 
 export default HintRow

packages/ui/src/components/instance/shell/SessionSidebar.tsx

@@ -1,7 +1,7 @@
 import { Show, type Accessor, type Component } from "solid-js"
 import type { SessionThread } from "../../../stores/session-state"
 import type { Session } from "../../../types/session"
-import type { KeyboardShortcut } from "../../../lib/keyboard-registry"
+import { keyboardRegistry, type KeyboardShortcut } from "../../../lib/keyboard-registry"
 import type { DrawerViewState } from "./types"
 
 import { PlusSquare, Search } from "lucide-solid"
@@ -13,7 +13,6 @@ import InfoOutlinedIcon from "@suid/icons-material/InfoOutlined"
 
 import SessionList from "../../session-list"
 import KeyboardHint from "../../keyboard-hint"
-import Kbd from "../../kbd"
 import WorktreeSelector from "../../worktree-selector"
 import AgentSelector from "../../agent-selector"
 import ModelSelector from "../../model-selector"
@@ -166,11 +165,17 @@ const SessionSidebar: Component<SessionSidebarProps> = (props) => (
 
               <ThinkingSelector instanceId={props.instanceId} currentModel={activeSession().model} />
 
-              <div class="session-sidebar-selector-hints" aria-hidden="true">
-                <Kbd shortcut="cmd+shift+a" />
-                <Kbd shortcut="cmd+shift+m" />
-                <Kbd shortcut="cmd+shift+t" />
-              </div>
+              <KeyboardHint
+                class="session-sidebar-selector-hints"
+                ariaHidden={true}
+                shortcuts={[
+                  keyboardRegistry.get("open-agent-selector"),
+                  keyboardRegistry.get("focus-model"),
+                  keyboardRegistry.get("focus-variant"),
+                ].filter((shortcut): shortcut is KeyboardShortcut => Boolean(shortcut))}
+                separator=" "
+                showDescription={false}
+              />
             </div>
           </>
         )}

packages/ui/src/components/kbd.tsx

@@ -1,4 +1,5 @@
 import { Component, JSX, For } from "solid-js"
+import useMediaQuery from "@suid/material/useMediaQuery"
 import { isMac } from "../lib/keyboard-utils"
 
 interface KbdProps {
@@ -27,6 +28,9 @@ const SPECIAL_KEY_LABELS: Record<string, string> = {
 }
 
 const Kbd: Component<KbdProps> = (props) => {
+  const desktopQuery = useMediaQuery("(min-width: 1280px)")
+  if (!desktopQuery()) return null
+
   const parts = () => {
     if (props.children) return [{ text: props.children, isModifier: false }]
     if (!props.shortcut) return []

packages/ui/src/components/keyboard-hint.tsx

@@ -1,14 +1,20 @@
 import { Component, For } from "solid-js"
-import { formatShortcut, isMac } from "../lib/keyboard-utils"
+import useMediaQuery from "@suid/material/useMediaQuery"
 import type { KeyboardShortcut } from "../lib/keyboard-registry"
 import Kbd from "./kbd"
 import HintRow from "./hint-row"
 
 const KeyboardHint: Component<{
   shortcuts: KeyboardShortcut[]
-  separator?: string
+  separator?: string | null
   showDescription?: boolean
+  class?: string
+  ariaHidden?: boolean
 }> = (props) => {
+  // Centralize layout gating here so call sites don't need to.
+  // We only show keyboard hint UI on desktop layouts.
+  const desktopQuery = useMediaQuery("(min-width: 1280px)")
+
   function buildShortcutString(shortcut: KeyboardShortcut): string {
     const parts: string[] = []
 
@@ -26,12 +32,14 @@ const KeyboardHint: Component<{
     return parts.join("+")
   }
 
+  if (!desktopQuery()) return null
+
   return (
-    <HintRow>
+    <HintRow class={props.class} ariaHidden={props.ariaHidden}>
       <For each={props.shortcuts}>
         {(shortcut, i) => (
           <>
-            {i() > 0 && <span class="mx-1">{props.separator || "•"}</span>}
+            {i() > 0 && props.separator !== null && <span class="mx-1">{props.separator ?? "•"}</span>}
             {props.showDescription !== false && <span class="mr-1">{shortcut.description}</span>}
             <Kbd shortcut={buildShortcutString(shortcut)} />
           </>