tests: fix test_shebang_install

The change allows `uv run --script` shebangs through to the shebang installer, while still rejecting plain `bin/python`, `env python`, and project-mode uv run (without --script) shebangs that need a separate installer to manage dependencies.

Author: enaples

tools/reckless

@@ -1151,9 +1151,14 @@ def check_for_shebang(source: InstInfo) -> bool:
             if entrypoint_file.split('\n')[0].startswith('#!'):
                 # Calling the python interpreter will not manage dependencies.
                 # Leave this to another python installer.
-                for interpreter in ['bin/python', 'env python', 'uv run']:
-                    if interpreter in entrypoint_file.split('\n')[0]:
+                # Exception: 'uv run --script' uses PEP 723 inline metadata and
+                # is self-contained — let the shebang installer handle it.
+                shebang_line = entrypoint_file.split('\n')[0]
+                for interpreter in ['bin/python', 'env python']:
+                    if interpreter in shebang_line:
                         return False
+                if 'uv run' in shebang_line and '--script' not in shebang_line:
+                    return False
                 return True
     return False