Add pool presets, operator bake-ins, and USB pack improvements

- Pool preset checkboxes with failover in Calibrate and Forge

- Tier 1/2 UX: setup banner, forge next worker, LAN defaults, blueprint prompt

- USB: auto-install forge tools, seed config.json, sync LAUNCH.bat

server/web/src/components/SessionGate.tsx

@@ -57,6 +57,9 @@ export default function SessionGate({ children }: { children: ReactNode }) {
         <form className="session-gate-card card" onSubmit={handleLogin}>
           <h1 className="font-display">AetherForge</h1>
           <p className="form-hint">Sign in to open the command deck.</p>
+          <p className="form-hint" style={{ marginTop: '0.5rem' }}>
+            First run: password is in the LAUNCH console or <code className="mono-sm">data\login-credentials.json</code> next to the server data folder.
+          </p>
           <label className="label" htmlFor="session-user">Username</label>
           <input id="session-user" className="input" value={user} onChange={(e) => setUser(e.target.value)} autoComplete="username" />
           <label className="label" htmlFor="session-pass">Password</label>