feat(cockpit): ride a tracked satellite in an orbital view

With a satellite tracked and no aircraft tracked, Cockpit can ride the
satellite. Entry needs only the Satellites layer; debris can be tracked but
not entered, and voice stays aircraft-only. Double-clicking the tracked
satellite or the entry buttons (reading ORBIT) enter it.

The camera sits on the satellite's per-frame SGP4 position and looks
straight down, turned to the ground track (north-up for a satellite with
none). The optical zoom steps 1x to 8x with a focus pull, the arrows tilt
the view up to 45 degrees off nadir, and Home or 0 returns to nadir. Off
nadir the tilt reads its total angle first and the swath readout becomes an
approximation marked with ≈. While in orbit the map leases flat Esri
imagery, the cloud pass stays off and the view opens in the optical style.

The orbital HUD names the satellite with its owner's flag (from the
flag-icons package, loaded per country) or an organisation badge, its
operator, class, NORAD and COSPAR ids and TLE epoch with the element lines
on request, altitude, orbital speed and the sub-satellite point. CURRENTLY
OVER names the country and its first-level division, or the sea, and from
8x the most prominent populated place nearby, looked up offline from the
bundled Natural Earth packs (populated places are a new pack). The
satellites layer hides the ridden satellite's own marks, dims the other
orbit rings and ignores scene clicks and Escape while held. Exit restores
the camera's field of view and the satellite's follow camera.

C no longer enters or leaves Cockpit, bridge or orbit: it is left to the
app-wide CCTV shortcut, and Escape or the exit button leave first person.

DATA_SOURCES.md

@@ -233,6 +233,7 @@ The [Bhote Koshi event pack](public/events/bhote-koshi-2026/README.md), under `p
 | **Natural Earth physical regions** (1,046 land + 292 marine named polygons) | `natural_earth/`                  | **Public domain**                                                                                         | ✅ (no restrictions)                             | "Made with Natural Earth" (courtesy credit — not legally required)          |
 | **DataSF Analysis Neighborhoods** (41 SF neighborhood polygons)             | `neighborhoods/`                  | **PDDL 1.0** (public domain)                                                                              | ✅ (no restrictions)                             | "City & County of San Francisco — DataSF" (courtesy — not legally required) |
 | **Natural Earth countries, states and provinces** (260 admin-0/map units + 4,587 admin-1 polygons)             | `natural_earth/`                  | **Public domain**                                                                                         | ✅ (no restrictions)                             | "Made with Natural Earth" (courtesy credit — not legally required)          |
+| **Natural Earth populated places** (7,342 points: name, position, rank)     | `natural_earth/`                  | **Public domain**                                                                                         | ✅ (no restrictions)                             | "Made with Natural Earth" (courtesy credit — not legally required)          |
 | **US Census Bureau counties** (3,235 county polygons)                       | `us_census_counties/`             | **Public domain**                                                                                         | ✅ (no restrictions)                             | "U.S. Census Bureau" (courtesy — not legally required)                      |
 | **US Census Bureau places** (32,629 city, town and CDP polygons)            | `us_census_places/`               | **Public domain**                                                                                         | ✅ (no restrictions)                             | "U.S. Census Bureau" (courtesy — not legally required)                      |
 | **Who's On First neighborhoods** (61,441 polygons)                          | `wof_neighborhoods/`              | Per source: CC BY, ODC-By, Open Government licences, CC0, PDDL, public domain (folder `ATTRIBUTION.md`)   | ✅ (attribution)                                 | "Neighborhood boundaries: Who's On First and contributors"; per-source credits in the folder |
@@ -317,6 +318,16 @@ https://www.naturalearthdata.com/about/terms-of-use/). We credit anyway: "Made w
 Earth". Registration in the in-app `dataCredits.js` attribution list ships with the resolver
 wiring (see below).
 
+### Natural Earth populated places (`natural_earth/populated_places.json`)
+
+Natural Earth 10m populated places (`ne_10m_populated_places_simple`, the same pinned
+`nvkelso/natural-earth-vector` commit and SHA-256 as the admin-1 build reads), reduced to one
+row per place: name, latitude and longitude rounded to 3 decimals, `scalerank` and `rank_max`
+(7,342 places, 229 KB). From 8x the orbital view names the most prominent place within half
+its width ("Sichuan, China · near Chengdu"), offline, with the states and provinces pack giving
+the division. Public domain; credited "Made with Natural Earth" with the other packs. Rebuild:
+`node scripts/build-admin-packs.mjs --only places`; provenance in the folder README.
+
 ### Sky background (`sky/`)
 
 Sources, licences, the changes CC BY asks to state, hashes and build commands