sun-zihang/dsh-cost-overlay

DeepSeek API cost overlay for the dsh web GUI: a floating bar at the top center of the screen showing the current model's unit prices (yuan per million tokens, peak/off-peak aware) and the current session's accumulated cost, computed from real token usage with cache-hit pricing. Hot-pluggable - mounted via the profile node_modules + a bundle row, no dsh source changes.