fix(filters): improve base model filtering UX

tests/services/test_model_scanner_base_models.py

@@ -0,0 +1,52 @@
+from types import SimpleNamespace
+
+import pytest
+
+from py.services.model_scanner import ModelScanner
+
+
+class DummyScanner:
+    def __init__(self, raw_data):
+        self._cache = SimpleNamespace(raw_data=raw_data)
+
+    async def get_cached_data(self):
+        return self._cache
+
+
+@pytest.mark.asyncio
+async def test_get_base_models_limit_zero_returns_all_sorted():
+    scanner = DummyScanner(
+        [
+            {"base_model": "SDXL"},
+            {"base_model": "LTXV 2.3"},
+            {"base_model": "SDXL"},
+            {"base_model": ""},
+            {},
+        ]
+    )
+
+    result = await ModelScanner.get_base_models(scanner, limit=0)
+
+    assert result == [
+        {"name": "SDXL", "count": 2},
+        {"name": "LTXV 2.3", "count": 1},
+    ]
+
+
+@pytest.mark.asyncio
+async def test_get_base_models_positive_limit_still_truncates():
+    scanner = DummyScanner(
+        [
+            {"base_model": "SDXL"},
+            {"base_model": "LTXV 2.3"},
+            {"base_model": "Flux.1 D"},
+            {"base_model": "SDXL"},
+        ]
+    )
+
+    result = await ModelScanner.get_base_models(scanner, limit=2)
+
+    assert result == [
+        {"name": "SDXL", "count": 2},
+        {"name": "LTXV 2.3", "count": 1},
+    ]