fix: replace substring alias matching with exact membership check in _base_model_matches

Uses an exact alias membership check instead of substring matching to prevent
false positives, e.g. 'zimage' alias no longer incorrectly matches
'zimagebase'.

core/sources/civarchive.py

@@ -501,11 +501,14 @@ def _base_model_matches(candidate: str, preferred: Optional[str]) -> bool:
 
     from .popular import load_base_model_aliases
     aliases = load_base_model_aliases()
+    # Exact alias membership check - avoids false positives from substring matching
+    # e.g. prevents "zimage" (Z-Image alias) from matching "zimagebase" (ZImageBase)
     preferred_tokens = aliases.get(preferred_norm, [preferred_norm])
-    return any(
-        token and (token in candidate_norm or candidate_norm in token)
-        for token in preferred_tokens
-    )
+    if candidate_norm in preferred_tokens:
+        return True
+    # Symmetric check: if preferred is an alias of candidate's model family
+    candidate_tokens = aliases.get(candidate_norm, [candidate_norm])
+    return preferred_norm in candidate_tokens
 
 
 def _base_model_score(candidate: str, preferred: Optional[str]) -> float:

core/sources/civitai.py

@@ -276,11 +276,14 @@ def _base_model_matches(candidate: str, preferred: Optional[str]) -> bool:
 
     from .popular import load_base_model_aliases
     aliases = load_base_model_aliases()
+    # Exact alias membership check - avoids false positives from substring matching
+    # e.g. prevents "zimage" (Z-Image alias) from matching "zimagebase" (ZImageBase)
     preferred_tokens = aliases.get(preferred_norm, [preferred_norm])
-    return any(
-        token and (token in candidate_norm or candidate_norm in token)
-        for token in preferred_tokens
-    )
+    if candidate_norm in preferred_tokens:
+        return True
+    # Symmetric check: if preferred is an alias of candidate's model family
+    candidate_tokens = aliases.get(candidate_norm, [candidate_norm])
+    return preferred_norm in candidate_tokens
 
 
 def _base_model_score(candidate: str, preferred: Optional[str]) -> float:

core/sources/lora_manager_archive.py

@@ -168,11 +168,14 @@ def _base_model_matches(candidate: str, preferred: Optional[str]) -> bool:
 
     from .popular import load_base_model_aliases
     aliases = load_base_model_aliases()
+    # Exact alias membership check - avoids false positives from substring matching
+    # e.g. prevents "zimage" (Z-Image alias) from matching "zimagebase" (ZImageBase)
     preferred_tokens = aliases.get(preferred_norm, [preferred_norm])
-    return any(
-        token and (token in candidate_norm or candidate_norm in token)
-        for token in preferred_tokens
-    )
+    if candidate_norm in preferred_tokens:
+        return True
+    # Symmetric check: if preferred is an alias of candidate's model family
+    candidate_tokens = aliases.get(candidate_norm, [candidate_norm])
+    return preferred_norm in candidate_tokens
 
 
 def _base_model_score(candidate: str, preferred: Optional[str]) -> float:

metadata/base-models.meta.json

@@ -1,6 +1,6 @@
 {
-  "updated_at": "2026-06-06T17:28:12+00:00",
-  "last_checked_at": "2026-06-06T17:28:12+00:00",
+  "updated_at": "2026-06-06T17:43:51+00:00",
+  "last_checked_at": "2026-06-06T17:43:51+00:00",
   "local_count": 91,
-  "new_models_added": 79
+  "new_models_added": 0
 }