Lstalu/dsh-quota-meter-plus

Enhanced derivative of ai-shushu/dsh-quota-meter; cannot be installed alongside it (both serve /quota). Per-session spend and quota meter for DSH: bills real token usage against an editable model price table (including peak/off-peak pricing), shows a live progress bar and, in the session header, a balance capsule (the balance needs a DeepSeek API key), and blocks new model calls when a session budget runs out. Subagent and helper-call spending rolls up into the parent session ledger.