Fix duplicate test method by renaming to unique name

The test file had two methods named `test_tool_result_with_ansi_codes`
at lines 512 and 545 in TestRenderContentBlock class. The second one
was silently overriding the first.

- Renamed second test to `test_tool_result_with_ansi_codes_snapshot`
- Updated docstring to clarify the test's purpose
- Renamed snapshot file to match new test name
- Both tests now run correctly (5 ANSI-related tests pass)

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

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: ShlomoStept

…ck.test_tool_result_with_ansi_codes.html …ool_result_with_ansi_codes_snapshot.htmltests/__snapshots__/test_generate_html/TestRenderContentBlock.test_tool_result_with_ansi_codes.html renamed to tests/__snapshots__/test_generate_html/TestRenderContentBlock.test_tool_result_with_ansi_codes_snapshot.html tests/__snapshots__/test_generate_html/TestRenderContentBlock.test_tool_result_with_ansi_codes.html renamed to tests/__snapshots__/test_generate_html/TestRenderContentBlock.test_tool_result_with_ansi_codes_snapshot.html

@@ -542,8 +542,12 @@ def test_tool_result_with_commit(self, snapshot_html):
         finally:
             claude_code_transcripts._github_repo = old_repo
 
-    def test_tool_result_with_ansi_codes(self, snapshot_html):
-        """Test that ANSI escape codes are stripped from tool results."""
+    def test_tool_result_with_ansi_codes_snapshot(self, snapshot_html):
+        """Test ANSI escape code stripping with snapshot comparison.
+
+        This is a snapshot test companion to test_tool_result_with_ansi_codes
+        that verifies the complete HTML output structure.
+        """
         block = {
             "type": "tool_result",
             "content": "\x1b[38;2;166;172;186mTests passed:\x1b[0m \x1b[32m✓\x1b[0m All 5 tests passed\n\x1b[1;31mError:\x1b[0m None",