fix(genetics): Genotyp-/Farbschlag-Engine-Bugs aus Ticket-Triage

- uw/Uwuw[d] (dichtes Underwhite) wird vor dem uw→G-Locus-Alias korrekt geparst
  (Vance: nicht mehr „Unbekannter Farbschlag", zeigt G-Locus statt international uw). [#34,#32]
- ee[-] = sichtbarer Fuchs (rezessiv homozygot) → korrekt als Fuchs; bare „e-"
  (rezessiv + unbekannt) ist genetisch unmöglich → genotypeInvalid statt still falsch. [#42]
- aa-Colourpoint-Zweig berücksichtigt jetzt D (Dilute) und E (Fuchs), statt fix
  Zobel/Marder/Siam zu erzwingen. [#3]
- Wurf-Farbprognose: unbekanntes Allel (?) wird nicht mehr über die volle Dominanz
  expandiert → keine unmöglichen Dilute-/Schimmel-/„Unbekannt"-Nachkommen. [#37,#39,#40,#41,#38]

Tests: test_genotype.py erweitert; genetics.test.ts +5 Blöcke (135 vitest grün, tsc/eslint sauber).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

tools/import/genotype.py

@@ -126,7 +126,15 @@ def parse(raw):
         for locus in LOCI:
             pat = _LOCUS_TOKEN.get(locus)
             if pat and pat.match(t):
-                mapped.setdefault(locus, _alleles_for(locus, t))   # first occurrence wins
+                alleles = _alleles_for(locus, t)
+                # #42 (E-locus e-dash): Fuchs (e) is RECESSIVE — a visible fox MUST be
+                # homozygous "ee" (written "ee[-]", which already parses to [e, e]).
+                # A lone recessive "e" with an unknown partner ("e-"/"e[-]" -> [e, ?])
+                # is genetically impossible; mirror the frontend by REJECTING it
+                # (leave it unmapped/invalid) instead of mapping a wrong colour.
+                if locus == "E" and alleles in (["e", "?"], ["?", "e"]):
+                    break  # invalid -> falls through to unmappedTokens below
+                mapped.setdefault(locus, alleles)   # first occurrence wins
                 matched = True
                 break
         if matched:

tools/import/test_genotype.py

@@ -61,6 +61,27 @@ check("DP -> tag", g.parse("[DP]")["tags"] == ["DP"])
 check("tag not in genotype loci", g.parse("WFNZ")["mapped8locus"] == {})
 check("tag not in unmapped", g.parse("aa WFNZ")["unmappedTokens"] == [])
 
+# --- #32/#34: dense-underwhite [d] annotation stripped, maps to G locus (never uw) ---
+r = g.parse("Uwuw[d]")
+check("Uwuw[d] -> Gg (dense underwhite, mixed case)", r["mapped8locus"].get("G") == ["G", "g"])
+check("Uwuw[d] leaves nothing unmapped (no stray uw token)", r["unmappedTokens"] == [])
+r = g.parse("aa Cc[chm] D- ee Uwuw[d] PP spsp")
+check("Vance genotype: G locus = Gg (display via G, not uw)", r["mapped8locus"].get("G") == ["G", "g"])
+check("Vance genotype: E locus = ee (Fuchs)", r["mapped8locus"].get("E") == ["e", "e"])
+check("Vance genotype: no unmapped tokens", r["unmappedTokens"] == [])
+
+# --- #42: E-locus e-dash semantics ---
+# ee[-] = visible Fuchs -> ee (recessive phenotype implies homozygosity)
+check("ee[-] -> ee (visible Fuchs)", g.parse("ee[-]")["mapped8locus"].get("E") == ["e", "e"])
+check("E- stays [E, ?] (valid unknown partner)", g.parse("E-")["mapped8locus"].get("E") == ["E", "?"])
+# bare e- / e[-] is genetically impossible -> invalid (not mapped, surfaced as unmapped)
+check("e- invalid -> not mapped at E", g.parse("e-")["mapped8locus"].get("E") is None)
+check("e- invalid -> in unmappedTokens", "e-" in g.parse("e-")["unmappedTokens"])
+check("e[-] invalid -> not mapped at E", g.parse("e[-]")["mapped8locus"].get("E") is None)
+r = g.parse("Aa CC D- ee[-] Gg Pp spsp")
+check("Algierfuchs genotype: E = ee (Fuchs)", r["mapped8locus"].get("E") == ["e", "e"])
+check("Algierfuchs genotype: no unmapped tokens", r["unmappedTokens"] == [])
+
 # --- looks_like_genotype recognizes Uw-bearing cells ---
 check("looks_like_genotype sees Uw as G",
       g.looks_like_genotype("aa Cc Uwuw") is True)