A plan view in the corner, a night you can actually see, and three kinds of visitor

The right half of the screen was empty sky. It holds the board now, drawn flat,
with the footprint of the camera's own frustum on it — the one part of a minimap
that earns its place, because it answers "where am I looking from" without
leaving the shot. Click it, drag it, scroll it. It is a 2D canvas rather than a
second WebGL context, cached per city and redrawn only when something moved.

Night was black. Not dark — black: at 3 a.m. the coastline, the hills and the
bay were one shape, and the frame read as a failed render rather than as
darkness. The sky already had a floor for exactly this reason and nothing did
the equivalent for the ground, so the ground has one now. The moon still has to
be worth computing, so the gap between a moonlit night and a moonless one is
preserved rather than filled in.

Three tiers, resolved once in the new src/access.ts: anonymous, signed in,
admin. Anonymous gets the map and a public office — the shell, the furniture,
the named viewpoints, nobody home — built without the private objects rather
than with them hidden, because scene.traverse makes hiding a leak with a bow on
it. The time scrubber and the debug readouts are admin only, and admin is
granted by TERA_ADMIN_SUBJECTS on the server and inferred nowhere else. An
unreachable API means member, never god: the promise is "clone it and it works",
not "clone it and you are an administrator of a deployment you did not
configure".

Three things this run found and fixed rather than shipped:

  - entryUrl came off the wire and went straight into an href with no scheme
    check, and a CSP of script-src 'self' 'unsafe-inline' does not stop a
    javascript: URL from navigating. One rejection point in access.ts now.
  - A 5xx from /health was the same null as "no API at all" and therefore the
    opposite conclusion. Eight seconds of tera-api restarting would have told
    every anonymous visitor they were a member. A 5xx is an answer; it fails
    closed.
  - decodeURIComponent in cookieToken was the one path in auth/index.ts that
    threw rather than returning ANONYMOUS, so one malformed cookie header from
    an unauthenticated caller turned /api/v1/session into a 500.

Also: keyboard shortcuts, focus rings, a boot state instead of a blank 2.3
seconds, a collapsible panel under 900px, and no horizontal overflow at 375,
768, 1440 or 2560.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

README.md

@@ -20,6 +20,31 @@ a city is a data contribution anyone can review, not a fork.
 San Francisco ships today. Los Angeles / Orange County / Riverside is next; New
 York after that.
 
+A **plan view** sits top right: the board drawn flat, with the footprint of the
+camera's own frustum on it, so you can see where you are looking from outside
+the shot. Click or drag it to move the camera; scroll it to dolly. It is a 2D
+canvas rather than a second WebGL context, drawn from the same city pack, and it
+follows the sun into the night along with everything else.
+
+## Who sees what
+
+Three tiers, resolved once at boot by `src/access.ts`:
+
+| | anonymous | signed in | admin |
+|---|---|---|---|
+| the map, the plan view, the named chapters | ✅ | ✅ | ✅ |
+| the office | public depth — shell, furniture, viewpoints, nobody home | full depth, with presence | full depth |
+| live markers and live traffic | — | ✅ | ✅ |
+| the time scrubber and debug readouts | — | — | ✅ |
+
+**These are drawing decisions, not a security boundary**, and `src/access.ts`
+says so at length. Live data and office presence are withheld by the *API*, from
+a caller it does not recognise; the client tier stops the app asking for
+something it will not get. Admin is granted only by `TERA_ADMIN_SUBJECTS` on the
+server — never inferred in the browser, and never from an API that failed to
+answer. A deployment with no API at all is open, because "clone it and it works"
+is the promise; it is not "clone it and you are an administrator".
+
 ## Quick start
 
 ```bash
@@ -76,7 +101,7 @@ answer is an RTL-SDR receiver: first-party data with nothing to comply with.
 ## Layout
 
 ```
-src/engine/    renderer — terrain, blocks, structures, markers, flights, scene
+src/engine/    renderer — terrain, blocks, structures, markers, flights, scene, minimap
 src/cities/    data packs — pure geography, no code
 src/adapters/  where outside data plugs in
 ```