Fix the no-org redirect loop and swallowed Google sign-in errors

Redirect chain traced across middleware.ts, ChromeSwitcher.tsx and
AuthProvider.tsx before touching anything, per the ask. Those three were
already correct as of c7f985d/2a1d52b/83416fe (middleware exempts
/onboarding and /signup from the drb_session cookie gate, ChromeSwitcher
sends any signed-in no-org user to /onboarding, AuthProvider only sets the
cookie once an org_id claim exists). The actual loop was one file upstream
of all three: app/login/page.tsx hardcoded `router.push("/dashboard")`
after both the email/password and Google handlers resolved. That push
races AuthProvider's async onAuthStateChanged -> getIdTokenResult ->
cookie decision. For a no-org account the cookie never gets set, so
middleware bounces the very next request back to /login with no
explanation — the ping-pong the coordinator saw live.

Fix: login page no longer navigates from the handlers. It waits on
AuthProvider's own `loading`/`orgId` and redirects once claims are
settled (/dashboard with org_id, /onboarding without). This also fixes a
second case: a user who lands on /login already signed in (e.g. bounced
there by middleware while their Firebase session was still valid) now
gets routed the same way instead of sitting inert on a login form with no
feedback. /onboarding itself (org-name form, single action) was already
adequate as the "explain the state" screen once the loop stopped
recreating it.

Also, live tonight: Google sign-in was failing outright in prod with no
console/network trace. app/login/page.tsx's Google handler did
`catch { setError("Google sign-in failed. Try again.") }` — no binding,
error discarded. Added lib/authErrors.ts: logs the raw error, and maps
Firebase codes to messages that distinguish two categories — the user's
own situation (popup blocked/closed, bad password, network) says "try
again"; deployment misconfiguration (auth/unauthorized-domain,
auth/operation-not-allowed) says so explicitly and does not suggest
retrying, since retrying can't fix a missing authorized-domain entry or a
disabled provider. Applied to both handlers in login/page.tsx and both
in signup/page.tsx (same swallowing pattern, same fix). Per the
coordinator's steer: this is diagnosis only — no popup-to-redirect
fallback, no auth method change. If production is hitting
auth/unauthorized-domain, that's a Firebase Console fix
(drb.cusano.net -> Authorized domains), not a code fix.

Nav.tsx: sign-out was only reachable from /profile. Added a profile
dropdown (desktop) and drawer entries (mobile) with Profile / Refresh
access / Sign out, so sign-out is reachable from anywhere in the app.

"Refresh access" calls AuthProvider.refreshClaims() (already existed,
already used by /onboarding after signup) so a user whose role or org
was just changed server-side can pick it up without a full logout.

Decision on unknown Google accounts (point 4): kept self-serve org
creation via /onboarding rather than a "request access" pending state.
BUSINESS_MODEL.md #2.1 already answers this for the owner: "a limited
free public tier *and* full paid access without contributing... cash is
the primary revenue line from day one." A pending-approval gate would
contradict that — it would make org creation itself the thing being
gated, when the model explicitly does not want contribution (or approval)
to be the only door. Self-serve org provisioning via POST /auth/signup
was already built for this (2a1d52b) and needed no further gating
decision, just for the loop in front of it to stop.

Reversible: no schema change, no new gating, no billing/Stripe touched.
Bench: rsync'd to the WSL-native ~/drb-frontend workspace and ran
`npx tsc --noEmit` there (per CLAUDE.md — the H: drive install path is
not viable) — exit 0, no errors. No Python touched this pass.

drb-frontend/app/login/page.tsx

@@ -1,48 +1,74 @@
 "use client";
 
-import { useState } from "react";
+import { useEffect, useState } from "react";
 import Link from "next/link";
 import { signInWithEmailAndPassword, GoogleAuthProvider, signInWithPopup } from "firebase/auth";
 import { auth } from "@/lib/firebase";
 import { c2api } from "@/lib/c2api";
 import { useRouter } from "next/navigation";
+import { useAuth } from "@/components/AuthProvider";
+import { describeAuthError } from "@/lib/authErrors";
 
 export default function LoginPage() {
   const [email, setEmail] = useState("");
   const [password, setPassword] = useState("");
   const [error, setError] = useState<string | null>(null);
-  const [loading, setLoading] = useState(false);
+  const [misconfigured, setMisconfigured] = useState(false);
+  const [submitting, setSubmitting] = useState(false);
   const router = useRouter();
+  const { user, loading: authLoading, orgId } = useAuth();
+
+  // Do NOT navigate straight from the sign-in handlers below: signInWith*
+  // resolves before AuthProvider's onAuthStateChanged listener has fetched
+  // claims and set/cleared the drb_session cookie. Pushing to /dashboard
+  // immediately races that — for a no-org account the cookie never gets
+  // set, so middleware.ts bounces the very next request straight back to
+  // /login, which is the ping-pong this screen used to cause. Instead,
+  // react to AuthProvider's own settled state: this also covers a user who
+  // arrives here already signed in (e.g. redirected from a protected route
+  // by middleware while their Firebase session was still valid) — same
+  // destination logic, no separate code path, no bounce.
+  useEffect(() => {
+    if (authLoading) return;
+    if (!user) return;
+    router.replace(orgId ? "/dashboard" : "/onboarding");
+  }, [authLoading, user, orgId, router]);
 
   async function handleSubmit(e: React.FormEvent) {
     e.preventDefault();
-    setLoading(true);
+    setSubmitting(true);
     setError(null);
+    setMisconfigured(false);
     try {
       await signInWithEmailAndPassword(auth, email, password);
       c2api.recordSession().catch(() => {});
-      router.push("/dashboard");
-    } catch {
-      setError("Invalid email or password.");
-    } finally {
-      setLoading(false);
+      // Redirect happens via the effect above once claims are settled.
+    } catch (err) {
+      const info = describeAuthError(err, "Invalid email or password.");
+      setError(info.message);
+      setMisconfigured(info.misconfiguration);
+      setSubmitting(false);
     }
   }
 
   async function handleGoogle() {
-    setLoading(true);
+    setSubmitting(true);
     setError(null);
+    setMisconfigured(false);
     try {
       await signInWithPopup(auth, new GoogleAuthProvider());
       c2api.recordSession().catch(() => {});
-      router.push("/dashboard");
-    } catch {
-      setError("Google sign-in failed. Try again.");
-    } finally {
-      setLoading(false);
+      // Redirect happens via the effect above once claims are settled.
+    } catch (err) {
+      const info = describeAuthError(err, "Google sign-in failed. Try again.");
+      setError(info.message);
+      setMisconfigured(info.misconfiguration);
+      setSubmitting(false);
     }
   }
 
+  const loading = submitting || !!user;
+
   return (
     <div className="max-w-sm mx-auto pt-16">
       <Link href="/" className="flex items-center justify-center gap-2 mb-6 font-mono font-bold text-white">
@@ -75,7 +101,9 @@ export default function LoginPage() {
               className="w-full bg-gray-800 border border-gray-700 rounded-lg px-3 py-2 text-white text-sm focus:outline-none focus:border-indigo-500"
             />
           </div>
-          {error && <p className="text-red-400 text-xs">{error}</p>}
+          {error && (
+            <p className={`text-xs ${misconfigured ? "text-amber-400" : "text-red-400"}`}>{error}</p>
+          )}
           <button
             type="submit"
             disabled={loading}

drb-frontend/app/signup/page.tsx

@@ -5,6 +5,7 @@ import Link from "next/link";
 import { createUserWithEmailAndPassword, GoogleAuthProvider, signInWithPopup } from "firebase/auth";
 import { auth } from "@/lib/firebase";
 import { useRouter } from "next/navigation";
+import { describeAuthError } from "@/lib/authErrors";
 
 /**
  * Self-serve account creation (SAAS_PLAN.md B4). Only creates the Firebase
@@ -17,6 +18,7 @@ export default function SignupPage() {
   const [email, setEmail] = useState("");
   const [password, setPassword] = useState("");
   const [error, setError] = useState<string | null>(null);
+  const [misconfigured, setMisconfigured] = useState(false);
   const [loading, setLoading] = useState(false);
   const router = useRouter();
 
@@ -24,18 +26,14 @@ export default function SignupPage() {
     e.preventDefault();
     setLoading(true);
     setError(null);
+    setMisconfigured(false);
     try {
       await createUserWithEmailAndPassword(auth, email, password);
       router.push("/onboarding");
-    } catch (err: unknown) {
-      const code = (err as { code?: string })?.code;
-      if (code === "auth/email-already-in-use") {
-        setError("An account with this email already exists. Try signing in instead.");
-      } else if (code === "auth/weak-password") {
-        setError("Password is too weak — use at least 6 characters.");
-      } else {
-        setError("Could not create your account. Check your details and try again.");
-      }
+    } catch (err) {
+      const info = describeAuthError(err, "Could not create your account. Check your details and try again.");
+      setError(info.message);
+      setMisconfigured(info.misconfiguration);
     } finally {
       setLoading(false);
     }
@@ -44,11 +42,14 @@ export default function SignupPage() {
   async function handleGoogle() {
     setLoading(true);
     setError(null);
+    setMisconfigured(false);
     try {
       await signInWithPopup(auth, new GoogleAuthProvider());
       router.push("/onboarding");
-    } catch {
-      setError("Google sign-up failed. Try again.");
+    } catch (err) {
+      const info = describeAuthError(err, "Google sign-up failed. Try again.");
+      setError(info.message);
+      setMisconfigured(info.misconfiguration);
     } finally {
       setLoading(false);
     }
@@ -87,7 +88,9 @@ export default function SignupPage() {
               className="w-full bg-gray-800 border border-gray-700 rounded-lg px-3 py-2 text-white text-sm focus:outline-none focus:border-indigo-500"
             />
           </div>
-          {error && <p className="text-red-400 text-xs">{error}</p>}
+          {error && (
+            <p className={`text-xs ${misconfigured ? "text-amber-400" : "text-red-400"}`}>{error}</p>
+          )}
           <button
             type="submit"
             disabled={loading}

drb-frontend/components/Nav.tsx

@@ -61,16 +61,37 @@ function MoonIcon() {
 }
 
 export function Nav() {
-  const { user, isAdmin, isOperator, isOrgOwner, orgId } = useAuth();
+  const { user, isAdmin, isOperator, isOrgOwner, orgId, signOut, refreshClaims } = useAuth();
   const pathname = usePathname();
   const router = useRouter();
   const { nodes: pending } = useUnconfiguredNodes();
   const unackedAlerts = useUnacknowledgedAlerts();
   const { theme, toggle } = useTheme();
   const [mobileOpen, setMobileOpen] = useState(false);
+  const [profileMenuOpen, setProfileMenuOpen] = useState(false);
+  const [refreshing, setRefreshing] = useState(false);
 
   if (!user) return null;
 
+  async function handleSignOut() {
+    setProfileMenuOpen(false);
+    await signOut();
+    router.push("/login");
+  }
+
+  // Re-fetches the ID token so a claims change made server-side (e.g. an
+  // admin granting a role, or org_id being provisioned) takes effect without
+  // a full sign-out/sign-in. See AuthProvider.refreshClaims.
+  async function handleRefreshClaims() {
+    setRefreshing(true);
+    try {
+      await refreshClaims();
+    } finally {
+      setRefreshing(false);
+      setProfileMenuOpen(false);
+    }
+  }
+
   const allLinks = [
     ...viewerLinks,
     ...(orgId === FOUNDING_ORG_ID || isAdmin ? [tripsLink] : []),
@@ -120,18 +141,51 @@ export function Nav() {
             {theme === "dark" ? <SunIcon /> : <MoonIcon />}
           </button>
 
-          {/* Profile avatar (desktop) */}
-          <button
-            onClick={() => router.push("/profile")}
-            className={`hidden md:flex items-center justify-center w-7 h-7 rounded-full text-xs font-bold transition-colors ${
-              pathname.startsWith("/profile")
-                ? "bg-indigo-600 text-white"
-                : "bg-gray-800 text-gray-300 hover:bg-gray-700"
-            }`}
-            title="Profile"
-          >
-            {(user?.displayName || user?.email || "?")[0].toUpperCase()}
-          </button>
+          {/* Profile avatar + dropdown (desktop) */}
+          <div className="hidden md:block relative">
+            <button
+              onClick={() => setProfileMenuOpen((v) => !v)}
+              className={`flex items-center justify-center w-7 h-7 rounded-full text-xs font-bold transition-colors ${
+                pathname.startsWith("/profile") || profileMenuOpen
+                  ? "bg-indigo-600 text-white"
+                  : "bg-gray-800 text-gray-300 hover:bg-gray-700"
+              }`}
+              title="Account"
+            >
+              {(user?.displayName || user?.email || "?")[0].toUpperCase()}
+            </button>
+
+            {profileMenuOpen && (
+              <>
+                {/* Click-away backdrop */}
+                <div className="fixed inset-0 z-40" onClick={() => setProfileMenuOpen(false)} />
+                <div className="absolute right-0 mt-2 w-48 bg-gray-900 border border-gray-800 rounded-lg shadow-lg z-50 py-1 font-mono text-sm">
+                  <Link
+                    href="/profile"
+                    onClick={() => setProfileMenuOpen(false)}
+                    className="block px-3 py-2 text-gray-300 hover:bg-gray-800 hover:text-white transition-colors"
+                  >
+                    Profile
+                  </Link>
+                  <button
+                    onClick={handleRefreshClaims}
+                    disabled={refreshing}
+                    className="w-full text-left px-3 py-2 text-gray-300 hover:bg-gray-800 hover:text-white transition-colors disabled:opacity-50"
+                    title="Pick up a role or org change made server-side, without signing out"
+                  >
+                    {refreshing ? "Refreshing…" : "Refresh access"}
+                  </button>
+                  <div className="border-t border-gray-800 my-1" />
+                  <button
+                    onClick={handleSignOut}
+                    className="w-full text-left px-3 py-2 text-red-500 hover:bg-gray-800 hover:text-red-400 transition-colors"
+                  >
+                    Sign out
+                  </button>
+                </div>
+              </>
+            )}
+          </div>
 
           {/* Hamburger (mobile) */}
           <button
@@ -177,7 +231,7 @@ export function Nav() {
               )}
             </Link>
           ))}
-          <div className="border-t border-gray-800 pt-3 mt-1">
+          <div className="border-t border-gray-800 pt-3 mt-1 flex flex-col gap-1">
             <Link
               href="/profile"
               onClick={() => setMobileOpen(false)}
@@ -187,6 +241,19 @@ export function Nav() {
             >
               Profile
             </Link>
+            <button
+              onClick={() => { setMobileOpen(false); handleRefreshClaims(); }}
+              disabled={refreshing}
+              className="py-2 text-sm font-mono text-gray-500 text-left disabled:opacity-50"
+            >
+              {refreshing ? "Refreshing…" : "Refresh access"}
+            </button>
+            <button
+              onClick={() => { setMobileOpen(false); handleSignOut(); }}
+              className="py-2 text-sm font-mono text-red-500 text-left"
+            >
+              Sign out
+            </button>
           </div>
         </div>
       )}

drb-frontend/lib/authErrors.ts

@@ -0,0 +1,55 @@
+/**
+ * Maps Firebase Auth error codes to user-facing messages instead of
+ * discarding them. Two categories:
+ *
+ *   - misconfiguration: something is wrong with *our* deployment (a domain
+ *     not on the authorized list, a sign-in provider not enabled in the
+ *     Firebase console). Retrying can never fix these — the message says so
+ *     instead of "try again", which would send a user into a retry loop
+ *     against a config problem only we can fix.
+ *   - everything else: the user's own situation (blocked/closed popup, bad
+ *     password, a network blip) — retrying might well work.
+ *
+ * Always logs the raw error so it isn't silently discarded — the point of
+ * this file is to stop swallowing that information, not just relabel it.
+ */
+
+export interface AuthErrorInfo {
+  message: string;
+  misconfiguration: boolean;
+}
+
+const MISCONFIGURATION_MESSAGES: Record<string, string> = {
+  "auth/unauthorized-domain":
+    "This domain isn't authorized for sign-in yet. That's a configuration issue on our end (Firebase Console → Authentication → Settings → Authorized domains) — retrying won't fix it. Please report this.",
+  "auth/operation-not-allowed":
+    "This sign-in method isn't enabled for this app yet. That's a configuration issue on our end (Firebase Console → Authentication → Sign-in method) — retrying won't fix it. Please report this.",
+};
+
+const USER_MESSAGES: Record<string, string> = {
+  "auth/popup-blocked": "Your browser blocked the sign-in popup. Allow popups for this site and try again.",
+  "auth/popup-closed-by-user": "Sign-in window was closed before finishing. Try again.",
+  "auth/cancelled-popup-request": "Sign-in was interrupted by another sign-in attempt. Try again.",
+  "auth/network-request-failed": "Network error — check your connection and try again.",
+  "auth/invalid-credential": "Invalid email or password.",
+  "auth/wrong-password": "Invalid email or password.",
+  "auth/user-not-found": "Invalid email or password.",
+  "auth/too-many-requests": "Too many attempts. Wait a few minutes and try again.",
+  "auth/email-already-in-use": "An account with this email already exists. Try signing in instead.",
+  "auth/weak-password": "Password is too weak — use at least 6 characters.",
+};
+
+export function describeAuthError(err: unknown, fallback: string): AuthErrorInfo {
+  const code = (err as { code?: string } | null | undefined)?.code;
+
+  // eslint-disable-next-line no-console
+  console.error("[auth]", code ?? "(no error code)", err);
+
+  if (code && MISCONFIGURATION_MESSAGES[code]) {
+    return { message: MISCONFIGURATION_MESSAGES[code], misconfiguration: true };
+  }
+  if (code && USER_MESSAGES[code]) {
+    return { message: USER_MESSAGES[code], misconfiguration: false };
+  }
+  return { message: fallback, misconfiguration: false };
+}