feat(web): add ? cheatsheet and / focus-search hotkeys

- New ShortcutsHelp modal enumerates global, nav G-chord and palette
  bindings; openable via ? (Shift+/) or the command palette.
- / dispatches a global decnet:focus-search event; Attackers, Bounty
  and LiveLogs listen and focus their in-page search inputs (pages
  without a local search are skipped per plan).
- Respects the existing editable-element guard and Alt+K palette
  toggle; no rebinds to prior shortcuts.

decnet_web/src/components/Attackers.tsx

@@ -1,8 +1,9 @@
-import React, { useEffect, useState } from 'react';
+import React, { useEffect, useRef, useState } from 'react';
 import { useSearchParams, useNavigate } from 'react-router-dom';
 import { Search, ChevronLeft, ChevronRight, Users } from 'lucide-react';
 import api from '../utils/api';
 import EmptyState from './EmptyState/EmptyState';
+import { useFocusSearch } from '../hooks/useFocusSearch';
 import './Dashboard.css';
 import './Attackers.css';
 
@@ -63,6 +64,8 @@ const Attackers: React.FC = () => {
   const [total, setTotal] = useState(0);
   const [loading, setLoading] = useState(true);
   const [searchInput, setSearchInput] = useState(query);
+  const searchRef = useRef<HTMLInputElement | null>(null);
+  useFocusSearch(searchRef);
 
   const limit = 50;
 
@@ -122,6 +125,7 @@ const Attackers: React.FC = () => {
         <div className="search-container">
           <Search size={14} className="search-icon" />
           <input
+            ref={searchRef}
             type="text"
             placeholder="Search by IP..."
             value={searchInput}

decnet_web/src/components/Bounty.tsx

@@ -1,4 +1,4 @@
-import React, { useEffect, useState } from 'react';
+import React, { useEffect, useRef, useState } from 'react';
 import { useSearchParams, useNavigate } from 'react-router-dom';
 import {
   Archive, Search, ChevronLeft, ChevronRight, Filter, Key, Package, ChevronRight as ChevR,
@@ -7,6 +7,7 @@ import {
 import api from '../utils/api';
 import BountyInspector from './BountyInspector';
 import EmptyState from './EmptyState/EmptyState';
+import { useFocusSearch } from '../hooks/useFocusSearch';
 import './Dashboard.css';
 import './Bounty.css';
 
@@ -57,6 +58,8 @@ const Bounty: React.FC = () => {
   const [total, setTotal] = useState(0);
   const [loading, setLoading] = useState(true);
   const [searchInput, setSearchInput] = useState(query);
+  const searchRef = useRef<HTMLInputElement | null>(null);
+  useFocusSearch(searchRef);
   const [selected, setSelected] = useState<BountyEntry | null>(null);
 
   const limit = 50;
@@ -118,6 +121,7 @@ const Bounty: React.FC = () => {
         <div className="search-container">
           <Search size={14} className="search-icon" />
           <input
+            ref={searchRef}
             type="text"
             placeholder="Filter by IP, decky, payload..."
             value={searchInput}

decnet_web/src/components/CommandPalette/CommandPalette.tsx

@@ -2,7 +2,7 @@ import React, { useEffect, useMemo, useRef, useState } from 'react';
 import {
   LayoutDashboard, Server, Network, Terminal, Archive, Crosshair,
   PlusCircle, Pause, RefreshCw, Download, HardDrive, Package, UserPlus, Settings,
-  SearchX,
+  SearchX, Keyboard,
 } from 'lucide-react';
 import EmptyState from '../EmptyState/EmptyState';
 import './CommandPalette.css';
@@ -33,6 +33,7 @@ const ITEMS: CmdItem[] = [
   { section: 'ACTIONS', label: 'Pause live stream',       icon: Pause,      kind: 'action', payload: 'pause-logs' },
   { section: 'ACTIONS', label: 'Force mutate all deckies', icon: RefreshCw, kind: 'action', payload: 'mutate-all' },
   { section: 'ACTIONS', label: 'Export bounty to JSON',   icon: Download,   kind: 'action', payload: 'export-bounty' },
+  { section: 'ACTIONS', label: 'Show keyboard shortcuts', icon: Keyboard,   kbd: '?', kind: 'action', payload: 'shortcuts-help' },
 ];
 
 interface Props {

decnet_web/src/components/LiveLogs.tsx

@@ -1,4 +1,5 @@
 import React, { useEffect, useState, useRef, useMemo } from 'react';
+import { useFocusSearch } from '../hooks/useFocusSearch';
 import { useSearchParams } from 'react-router-dom';
 import {
   Terminal, Search, BarChart3, ChevronLeft, ChevronRight,
@@ -39,6 +40,8 @@ const LiveLogs: React.FC = () => {
   const [loading, setLoading] = useState(true);
   const [streaming, setStreaming] = useState(isLive);
   const [searchInput, setSearchInput] = useState(query);
+  const searchRef = useRef<HTMLInputElement | null>(null);
+  useFocusSearch(searchRef);
   const [selectedHour, setSelectedHour] = useState<number | null>(null);
 
   const eventSourceRef = useRef<EventSource | null>(null);
@@ -200,6 +203,7 @@ const LiveLogs: React.FC = () => {
         <div className="search-container">
           <Search size={14} className="search-icon" />
           <input
+            ref={searchRef}
             type="text"
             placeholder="Query (e.g. decky:decky-03 service:ssh attacker:89.248)"
             value={searchInput}

decnet_web/src/components/ShortcutsHelp/ShortcutsHelp.css

@@ -0,0 +1,59 @@
+.shk-body {
+  display: grid;
+  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
+  gap: 20px;
+  padding: 18px 20px 24px;
+}
+
+.shk-group {
+  display: flex;
+  flex-direction: column;
+  gap: 8px;
+}
+
+.shk-title {
+  font-size: 0.7rem;
+  letter-spacing: 0.14em;
+  color: var(--dim-color);
+  margin: 0 0 4px;
+  text-transform: uppercase;
+}
+
+.shk-rows {
+  display: flex;
+  flex-direction: column;
+  gap: 4px;
+}
+
+.shk-row {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  gap: 12px;
+  padding: 4px 0;
+  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
+  font-size: 0.8rem;
+}
+
+.shk-label {
+  color: var(--text-color);
+  opacity: 0.8;
+}
+
+.shk-keys {
+  display: inline-flex;
+  gap: 4px;
+}
+
+.shk-keys kbd {
+  font-family: inherit;
+  font-size: 0.7rem;
+  letter-spacing: 0.05em;
+  padding: 2px 6px;
+  border: 1px solid rgba(255, 255, 255, 0.12);
+  background: rgba(255, 255, 255, 0.03);
+  color: var(--text-color);
+  border-radius: 3px;
+  min-width: 20px;
+  text-align: center;
+}

decnet_web/src/components/ShortcutsHelp/ShortcutsHelp.tsx

@@ -0,0 +1,77 @@
+import React from 'react';
+import { Keyboard } from 'lucide-react';
+import Modal from '../Modal/Modal';
+import './ShortcutsHelp.css';
+
+interface Props {
+  open: boolean;
+  onClose: () => void;
+}
+
+interface Binding {
+  keys: string;
+  label: string;
+}
+
+const GLOBAL: Binding[] = [
+  { keys: 'Alt+K', label: 'Open command palette' },
+  { keys: '?', label: 'Show this cheatsheet' },
+  { keys: '/', label: 'Focus page search' },
+  { keys: 'Esc', label: 'Close modal / palette' },
+];
+
+const NAV: Binding[] = [
+  { keys: 'G D', label: 'Dashboard' },
+  { keys: 'G F', label: 'Decoy Fleet' },
+  { keys: 'G M', label: 'MazeNET' },
+  { keys: 'G L', label: 'Live Logs' },
+  { keys: 'G B', label: 'Bounty Vault' },
+  { keys: 'G A', label: 'Attackers' },
+  { keys: 'G S', label: 'SWARM Hosts' },
+  { keys: 'G U', label: 'Remote Updates' },
+  { keys: 'G E', label: 'Agent Enrollment' },
+  { keys: 'G C', label: 'Config' },
+];
+
+const PALETTE: Binding[] = [
+  { keys: '↑ ↓', label: 'Navigate entries' },
+  { keys: '⏎', label: 'Run selected entry' },
+  { keys: 'Esc', label: 'Dismiss palette' },
+];
+
+const Group: React.FC<{ title: string; rows: Binding[] }> = ({ title, rows }) => (
+  <section className="shk-group">
+    <h4 className="shk-title">{title}</h4>
+    <div className="shk-rows">
+      {rows.map(r => (
+        <div className="shk-row" key={r.keys}>
+          <span className="shk-keys">
+            {r.keys.split(' ').map((k, i) => (
+              <kbd key={i}>{k}</kbd>
+            ))}
+          </span>
+          <span className="shk-label">{r.label}</span>
+        </div>
+      ))}
+    </div>
+  </section>
+);
+
+const ShortcutsHelp: React.FC<Props> = ({ open, onClose }) => (
+  <Modal
+    open={open}
+    onClose={onClose}
+    title="KEYBOARD SHORTCUTS"
+    icon={Keyboard}
+    accent="violet"
+    width="wide"
+  >
+    <div className="modal-body shk-body">
+      <Group title="GLOBAL" rows={GLOBAL} />
+      <Group title="NAVIGATION (G-CHORD)" rows={NAV} />
+      <Group title="COMMAND PALETTE" rows={PALETTE} />
+    </div>
+  </Modal>
+);
+
+export default ShortcutsHelp;