fix: correct final whole-branch review findings for 0.6.6 English content

- TRAVELLING spelling: fix TRAVELING -> TRAVELLING in travel-panel.component.html
  to match UK spelling used everywhere else (world/hunting/combat stores + API
  error messages)
- Grenzwacht -> Border Watch: fix stale German faction display name in
  reputation-display, reputation.service/controller, turn-in.service specs,
  and the vertical-slice seed spec test title
- Suedtor von Graufurt -> Graufurt South Gate: fix stale ASCII-transliterated
  German location name in hunting.service.spec.ts
- Aschenfelder(n) -> Ashen Fields: fix stale German location name/description
  in top-bar.component.spec.ts and context-panel.component.spec.ts (key
  identifiers left untouched)
- Fix 7 test titles still describing translated error messages as "German"
  across world/hunting/inventory/combat store specs
- README: update demo location names from German to their current English
  names (Graufurt South Gate, Burned Road)
- item-rarity.enum.ts: fix now-false comment claiming rarity labels are
  German; the frontend RARITY_LABELS map is English

Pure literal-string/comment substitutions; no keys, ids, or logic changed.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01ACkMEDYiwtcfchqKkiUJNX

README.md

@@ -7,8 +7,8 @@ A dark-fantasy browser RPG built as an npm-workspace modular monolith:
 - `packages/*` — reserved shared boundaries (currently unused)
 
 This README documents the first visible vertical slice: a server-authoritative
-world/travel loop between two locations (Südtor von Graufurt and Verbrannte
-Straße) for one demo character, with no login required.
+world/travel loop between two locations (Graufurt South Gate and Burned Road)
+for one demo character, with no login required.
 
 ## Prerequisites
 
@@ -47,8 +47,8 @@ running. Once both are up:
 - Web: `http://localhost:4200`, which proxies `/api/*` requests to
   `http://localhost:3000` in development (see `apps/web/proxy.conf.json`)
 
-Open `http://localhost:4200/world` to see Aric Duskwalker at the Südtor von
-Graufurt and travel to the Verbrannte Straße and back.
+Open `http://localhost:4200/world` to see Aric Duskwalker at the Graufurt
+South Gate and travel to the Burned Road and back.
 
 ### Configuration (`.env`)