Fix PyICU tests to use case_sensitive=False with UNICODE/LOCALE collations

The 0.5.0 refactoring changed UNICODE and LOCALE collations to default to
case_sensitive=True. The PyICU tests were expecting case-insensitive behavior
but weren't explicitly setting case_sensitive=False, causing failures in CI
where PyICU is installed.

Updated tests:
- test_pyicu_unicode_collation_with_pyicu
- test_pyicu_locale_collation_with_pyicu
- test_unicode_collation_case_insensitive (parameterized)
- test_turkish_i_requires_locale
- test_locale_specific_collation_turkish

All tests now explicitly set case_sensitive=False when expecting case-insensitive
matching with UNICODE/LOCALE collations.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

Author: tobixen

tests/test_collation.py

@@ -250,7 +250,7 @@ def test_pyicu_unicode_collation_with_pyicu() -> None:
 
     searcher = Searcher(event=True)
     searcher.add_property_filter(
-        "SUMMARY", "test", operator="contains", collation=Collation.UNICODE
+        "SUMMARY", "test", operator="contains", collation=Collation.UNICODE, case_sensitive=False
     )
 
     result = searcher.check_component(event)
@@ -267,7 +267,12 @@ def test_pyicu_locale_collation_with_pyicu() -> None:
 
     searcher = Searcher(event=True)
     searcher.add_property_filter(
-        "SUMMARY", "müller", operator="contains", collation=Collation.LOCALE, locale="de_DE"
+        "SUMMARY",
+        "müller",
+        operator="contains",
+        collation=Collation.LOCALE,
+        locale="de_DE",
+        case_sensitive=False,
     )
 
     result = searcher.check_component(event)

tests/test_unicode.py

@@ -442,7 +442,7 @@ def test_unicode_collation_case_insensitive(self, text: str, search: str) -> Non
             cal = make_event(text)
             searcher = Searcher()
             searcher.add_property_filter(
-                "SUMMARY", search, operator="==", collation=Collation.UNICODE
+                "SUMMARY", search, operator="==", collation=Collation.UNICODE, case_sensitive=False
             )
             result = searcher.check_component(cal)
             # With UNICODE collation, case-insensitive matching should work
@@ -461,7 +461,11 @@ def test_turkish_i_requires_locale(self) -> None:
             # Turkish İ is U+0130, which is distinct from ASCII i (U+0069)
             searcher_unicode = Searcher()
             searcher_unicode.add_property_filter(
-                "SUMMARY", "istanbul", operator="==", collation=Collation.UNICODE
+                "SUMMARY",
+                "istanbul",
+                operator="==",
+                collation=Collation.UNICODE,
+                case_sensitive=False,
             )
             result_unicode = searcher_unicode.check_component(cal)
             # Root locale doesn't do Turkish-specific case folding
@@ -470,7 +474,12 @@ def test_turkish_i_requires_locale(self) -> None:
             # With Turkish locale, İ DOES match i
             searcher_turkish = Searcher()
             searcher_turkish.add_property_filter(
-                "SUMMARY", "istanbul", operator="==", collation=Collation.LOCALE, locale="tr_TR"
+                "SUMMARY",
+                "istanbul",
+                operator="==",
+                collation=Collation.LOCALE,
+                locale="tr_TR",
+                case_sensitive=False,
             )
             result_turkish = searcher_turkish.check_component(cal)
             assert result_turkish, "Turkish locale should match İ with i"
@@ -514,6 +523,7 @@ def test_locale_specific_collation_turkish(self) -> None:
                 operator="==",
                 collation=Collation.LOCALE,
                 locale="tr_TR",
+                case_sensitive=False,
             )
             # With Turkish locale, İ lowercases to i, I lowercases to ı
             result = searcher.check_component(cal_i_dotted)