feat(rust): eight more minor map labels start hidden (D213)

Read from the Carbon rig regenerated at world 6000, seed 981448696, whose map
carries every built-in label: the three that were unverified (Oxum's Gas
Station, Mining Outpost, Ranch) are spelled as written. Adds Canyon B/C,
Lake A, Oasis A/C, Mountain, Train Tunnel Link and Abandoned Cabins, and a
test over that map's 51 real labels.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01E14m6SuuY6i1vASFeGDBeY

server/test/map.test.js

@@ -247,6 +247,25 @@ test('D196: a fresh install hides the minor labels and shows everything else, a
   assert.equal(map.markerShown({}, 'JUNGLE  Swamp'), false, 'labels match case- and space-insensitively')
 })
 
+test('D196/D213: the Carbon rig’s 6000 map (seed 981448696) draws its 29 places and hides its 22 minor labels', () => {
+  // Every label that map carries, as the game spelled them on 2026-09-29.
+  const minor = [
+    'Abandoned Cabins', 'Abandoned Supermarket', 'Canyon B', 'Canyon C', 'Fishing Village', 'Ice Lake', 'Jungle ruin',
+    'jungle swamp', 'Lake A', 'Large Barn', 'Mining Outpost', 'Mountain', 'Oasis A', 'Oasis C', "Oxum's Gas Station",
+    'Ranch', 'Substation', 'Train Tunnel', 'Train Tunnel Link', 'Underground Cave', 'Water Well', 'Wild Swamp',
+  ]
+  const places = [
+    'Abandoned Military Base', 'Airfield', 'Apartment Complex', 'Arctic Research Base', 'Bandit Camp', 'Ferry Terminal',
+    'Giant Excavator Pit', 'Harbor', 'HQM Quarry', 'Jungle Ziggurat', 'Junkyard', 'Large Fishing Village', 'Large Oil Rig',
+    'Launch Site', 'Lighthouse', 'Military Tunnel', 'Missile Silo', 'Oil Rig', 'Outpost', 'Power Plant', 'Radtown',
+    'Satellite Dish', 'Sewer Branch', 'Stone Quarry', 'Sulfur Quarry', 'The Dome', 'Train Yard', 'Underwater Lab',
+    'Water Treatment Plant',
+  ]
+  const all = [...minor, ...places].map((label, i) => ({ kind: `k${i}`, label, x: i, z: i }))
+  assert.deepStrictEqual(labelsOf(map.filterMonuments(all, {})).sort(), [...places].sort())
+  assert.equal(map.MINOR_LABELS.length, minor.length, 'every built-in label is on that map')
+})
+
 test('D196: the fleet turns a minor label on, and a server turns it off again for itself only', async (t) => {
   settings(t, {
     stored: { 'map.marker.substation': 'on', 'map.marker.power plant': 'off', 'map.marker.jungle swamp': 'maybe' },