fix: Docker path translation for review_changes and code deduplication

- Fixed review_changes tool to properly translate host paths to container paths in Docker
- Prevents "No such file or directory" errors when running in Docker containers
- Added proper error handling with clear messages when paths are inaccessible

refactor: Centralized token limit validation across all tools
- Added _validate_token_limit method to BaseTool to eliminate code duplication
- Reduced ~25 lines of duplicated code across 5 tools (analyze, chat, debug_issue, review_code, think_deeper)
- Maintains exact same error messages and behavior

feat: Enhanced large prompt handling
- Added support for prompts >50K chars by requesting file-based input
- Preserves MCP's ~25K token capacity for responses
- All tools now check prompt size before processing

test: Added comprehensive Docker path integration tests
- Tests for path translation, security validation, and error handling
- Tests for review_changes tool specifically with Docker paths
- Fixed failing think_deeper test (updated default from "max" to "high")

chore: Code quality improvements
- Applied black formatting across all files
- Fixed import sorting with isort
- All tests passing (96 tests)
- Standardized error handling follows MCP TextContent format

The changes ensure consistent behavior across all environments while reducing code duplication and improving maintainability.

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

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

examples/claude_config_docker_home.json

@@ -0,0 +1,20 @@
+{
+  "comment": "Docker configuration that mounts your home directory",
+  "comment2": "Update paths: /path/to/gemini-mcp-server/.env and /Users/your-username",
+  "comment3": "The container can only access files within the mounted directory",
+  "mcpServers": {
+    "gemini": {
+      "command": "docker",
+      "args": [
+        "run",
+        "--rm",
+        "-i",
+        "--env-file", "/path/to/gemini-mcp-server/.env",
+        "-e", "WORKSPACE_ROOT=/Users/your-username",
+        "-e", "MCP_PROJECT_ROOT=/workspace",
+        "-v", "/Users/your-username:/workspace:ro",
+        "gemini-mcp-server:latest"
+      ]
+    }
+  }
+}