feat: optimize analyze_code for Claude Code with improved formatting

BREAKING CHANGES:
- Remove verbose_output from tool schema (Claude Code can't accidentally use it)
- Always show minimal terminal output with file previews
- Improved file content formatting for Gemini with clear delimiters

Key improvements:
- Files formatted as "--- BEGIN FILE: path --- content --- END FILE: path ---"
- Direct code formatted as "--- BEGIN DIRECT CODE --- code --- END DIRECT CODE ---"
- Terminal shows file paths, sizes, and small previews (not full content)
- Clear prompt structure for Gemini: USER REQUEST | CODE TO ANALYZE sections
- Prevents terminal hangs/glitches with large files in Claude Code
- All tests updated and passing

This ensures Claude Code stays responsive while Gemini gets properly formatted content.

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

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

tests/test_gemini_server.py

@@ -61,7 +61,6 @@ class TestModels:
         assert request.max_tokens == 8192
         assert request.temperature == 0.2
         assert request.model == DEFAULT_MODEL
-        assert request.verbose_output == False
 
 
 class TestFileOperations:
@@ -73,7 +72,8 @@ class TestFileOperations:
         test_file.write_text("def hello():\n    return 'world'", encoding='utf-8')
         
         content = read_file_content(str(test_file))
-        assert "=== File:" in content
+        assert "--- BEGIN FILE:" in content
+        assert "--- END FILE:" in content
         assert "def hello():" in content
         assert "return 'world'" in content
     
@@ -84,12 +84,14 @@ class TestFileOperations:
             os.path.sep, "nonexistent_dir_12345", "nonexistent_file.py"
         )
         content = read_file_content(nonexistent_path)
-        assert "Error: File not found" in content
+        assert "--- FILE NOT FOUND:" in content
+        assert "Error: File does not exist" in content
     
     def test_read_file_content_directory(self, tmp_path):
         """Test reading a directory instead of file"""
         content = read_file_content(str(tmp_path))
-        assert "Error: Not a file" in content
+        assert "--- NOT A FILE:" in content
+        assert "Error: Path is not a file" in content
     
     def test_prepare_code_context_with_files(self, tmp_path):
         """Test preparing context from files"""
@@ -99,20 +101,23 @@ class TestFileOperations:
         file2.write_text("print('file2')", encoding='utf-8')
         
         context, summary = prepare_code_context([str(file1), str(file2)], None)
+        assert "--- BEGIN FILE:" in context
         assert "file1.py" in context
         assert "file2.py" in context
         assert "print('file1')" in context
         assert "print('file2')" in context
-        assert "Analyzing 2 file(s)" in summary
+        assert "--- END FILE:" in context
+        assert "📁 Analyzing 2 file(s)" in summary
         assert "bytes)" in summary
     
     def test_prepare_code_context_with_code(self):
         """Test preparing context from direct code"""
         code = "def test():\n    pass"
         context, summary = prepare_code_context(None, code)
-        assert "=== Direct Code ===" in context
+        assert "--- BEGIN DIRECT CODE ---" in context
+        assert "--- END DIRECT CODE ---" in context
         assert code in context
-        assert "Direct code provided" in summary
+        assert "💻 Direct code provided" in summary
     
     def test_prepare_code_context_mixed(self, tmp_path):
         """Test preparing context from both files and code"""
@@ -123,8 +128,8 @@ class TestFileOperations:
         context, summary = prepare_code_context([str(test_file)], code)
         assert "# From file" in context
         assert "# Direct code" in context
-        assert "Analyzing 1 file(s)" in summary
-        assert "Direct code provided" in summary
+        assert "📁 Analyzing 1 file(s)" in summary
+        assert "💻 Direct code provided" in summary
 
 
 class TestToolHandlers:
@@ -227,8 +232,8 @@ class TestToolHandlers:
         assert len(result) == 1
         # Check that the response contains both summary and Gemini's response
         response_text = result[0].text
-        assert "Analyzing 1 file(s)" in response_text
-        assert "Gemini's response:" in response_text
+        assert "📁 Analyzing 1 file(s)" in response_text
+        assert "🤖 Gemini's Analysis:" in response_text
         assert "Analysis result" in response_text
     
     @pytest.mark.asyncio