Fix test coverage regression by updating import paths and test files

pr_description.md

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+## Overview
+This PR fixes the code coverage regression by updating the import statements in test files and using improved test versions.
+
+## Changes
+- Updated import statements in test files to use direct imports from `src.cli_code` instead of `cli_code` to ensure proper coverage tracking
+- Updated test scripts to use the improved test files from the `test_dir/improved` directory
+- Added BaseTool tests in coverage scripts to improve coverage of the base tool class
+- Fixed failing assertions in the Gemini model tests
+- Updated tools coverage script to include all the necessary tool tests
+
+## Test Results
+- Tools coverage increased to 95.26% overall
+- Individual components show excellent coverage:
+  - 100% coverage for directory_tools, quality_tools, task_complete_tool, and test_runner
+  - 98.65% coverage for summarizer_tool
+  - 96.70% coverage for tree_tool
+  - 89.83% coverage for file_tools
+  - 87.50% coverage for base tool class
+
+## Why It's Needed
+The code coverage had regressed due to import paths not being correctly set for coverage tracking. These changes restore and improve the coverage levels while ensuring all tests pass reliably.
+
+Fixes the coverage regression issues previously identified.