dsh-theme-tuner: Fine-Tuning the Interface Theme in DeepSeek Harness

`dsh-theme-tuner` is a Web extension for DeepSeek Harness (DSH) that allows users to fine-tune interface colors based on an existing theme. Mounted under "General Settings → Appearance," it supports independent adjustments for accent color, background, contrast, and gradient intensity, and saves configurations separately for light and dark modes. With real-time updates and a one-click reset feature, users can precisely customize interface details without extra extensions, addressing the difficulty of theme customization. A Web Profile restart is required after installation for changes to take effect.