refactor(data): rename Krenn to Van Maanen's Star

System S-057 assigned to real star GJ 35 (Van Maanen's Star, DG white
dwarf at 13.9 ly). Renamed across all content, server code, docs,
decisions, wiki lore, and config files. 224 files updated.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

server/src/bin/generator_spike.rs

@@ -56,8 +56,8 @@ struct Args {
     #[arg(long)]
     seed: u64,
 
-    /// Culture to use (default: "krenn").
-    #[arg(long, default_value = "krenn")]
+    /// Culture to use (default: "van-maanens-star").
+    #[arg(long, default_value = "van-maanens-star")]
     culture: String,
 
     /// Phase 2: load zone spec and culture from RON files on disk.
@@ -226,10 +226,10 @@ fn hardcoded_industrial_zone() -> ZoneSpec {
 // Phase 1: hardcoded culture stub
 // ---------------------------------------------------------------------------
 
-fn hardcoded_krenn_culture() -> CultureProfile {
+fn hardcoded_van_maanens_star_culture() -> CultureProfile {
     CultureProfile {
-        id: "krenn".into(),
-        name: "Krenn System Culture".into(),
+        id: "van-maanens-star".into(),
+        name: "Van Maanen's Star Culture".into(),
         description: "Working-class pragmatic culture. ~180 years settled. Community-oriented, suspicious of distant authority, values competence and reliability.".into(),
         naming: NamingConventions {
             style: "compact, consonant-heavy, first-name-primary".into(),
@@ -1007,9 +1007,9 @@ fn main() {
             }
         };
         let culture = match args.culture.as_str() {
-            "krenn" => hardcoded_krenn_culture(),
+            "van-maanens-star" => hardcoded_van_maanens_star_culture(),
             other => {
-                eprintln!("Unknown culture: '{}'. Use 'krenn'.", other);
+                eprintln!("Unknown culture: '{}'. Use 'van-maanens-star'.", other);
                 eprintln!("(Phase 2 with --from-files loads culture RON from disk)");
                 process::exit(1);
             }

server/src/bin/validate_ron.rs

@@ -9,7 +9,7 @@
 //! ```sh
 //! # Via wrapper script (recommended):
 //! tooling/validate-ron content/global/zone-identity-spec.example.ron zone
-//! tooling/validate-ron content/global/culture-krenn.example.ron culture
+//! tooling/validate-ron content/global/culture-van-maanens-star.example.ron culture
 //!
 //! # Direct:
 //! cargo run --bin validate_ron -- <file.ron> <zone|culture>