dsh-compact-manager: Hierarchical Compaction Threshold Manager for DeepSeek Harness

dsh-compact-manager is a DeepSeek Harness plugin designed to address premature triggering caused by an overly low default compression threshold. It provides a three-level override strategy spanning global, context-length tier, and model scopes, allowing users to customize the trigger formula (such as a ratio, output reserve, or fixed value). Through the sidebar, the plugin enables real-time viewing and editing of configurations and supports applying presets, primarily for finely controlling the timing of context compression and preventing premature loss of historical information.