feat(ui+legacy): F8-05 owner-feedback round 1 — inspector tweaks + parser

Owner-reported polish on top of #48, plus a legacy-parser gap that
prevented verifying stationed ship groups against a real .REP fixture.

UI:
- Production: drop the empty `(production)` placeholder option. Owned
  planets always produce something, so the primary select now opens on
  `industry` by default when `planet.production` is null/unknown,
  keeping the row inside the four real production kinds at all times.
- Production: lock the row to a single line (no flex-wrap) and strip
  border + padding from the ✓/✗ buttons so the apply/cancel icons read
  as glyphs and the row no longer breaks into two visual rows for
  Research / Ship contexts where both selects are present.
- Cargo routes: the placeholder option is now an `<option disabled>`
  styled like a section header (greyed, italic) and reads "manage
  routes" instead of "cargo routes". The wording shifts the intent
  from a section label to an action prompt.

Legacy parser:
- F8-05 (#48 п.32) "Stationed ship groups" couldn't be verified against
  the dg fixture because the legacy `<Race> Groups` blocks (outside
  battles) and the `Unidentified Groups` block were dropped by the
  parser — both are now wired up. Foreign group rows parse the
  `# T D W S C T Q D P M` columns and resolve the destination against
  the parsed planet tables (rows with an invisible destination drop,
  matching the existing local-group convention). The legacy row
  carries no origin / range columns, so foreign groups surface as
  stationed at the destination.
- Smoke tests on every fixture extended with `otherGroups` and
  `unidentifiedGroups` counts. New focused unit test
  `TestParseOtherAndUnidentifiedGroups` covers the column layout, the
  drop-on-unknown-destination rule, and the `X Y`-only unidentified
  rows.
- `tools/local-dev/reports/dg/KNNTS039.json` and
  `tools/local-dev/reports/dg/KNNTS041.json` regenerated so the
  synthetic-loader fixtures carry the new arrays.
- README updated: the two sections move out of "Skipped sections" into
  a "Foreign and unidentified groups" block; package doc-comment
  reflects the broader scope.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

ui/frontend/src/lib/i18n/locales/en.ts

@@ -292,7 +292,6 @@ const en = {
 	"game.inspector.planet.rename.invalid.disallowed_character": "name contains disallowed characters",
 	"game.inspector.planet.production.title": "production",
 	"game.inspector.planet.production.main.aria": "production type",
-	"game.inspector.planet.production.main.placeholder": "(production)",
 	"game.inspector.planet.production.option.industry": "industry",
 	"game.inspector.planet.production.option.materials": "materials",
 	"game.inspector.planet.production.option.research": "research",
@@ -308,7 +307,7 @@ const en = {
 	"game.inspector.planet.production.ship.no_classes": "no ship classes designed yet",
 	"game.inspector.planet.production.apply": "apply production change",
 	"game.inspector.planet.production.cancel": "discard production change",
-	"game.inspector.planet.cargo.placeholder": "cargo routes",
+	"game.inspector.planet.cargo.placeholder": "manage routes",
 	"game.inspector.planet.cargo.slot.col": "colonists",
 	"game.inspector.planet.cargo.slot.cap": "industry",
 	"game.inspector.planet.cargo.slot.mat": "materials",