Drawings reset after expiry

Issue: Drawings (e.g., trend lines, markings) on charts are automatically wiped out immediately after contract/option expiry. This forces users to manually redo all annotations on new charts, leading to significant time loss.

Proposed Solution: retain all existing drawings across expiry events, persisting them on the chart for continuity.Add a prominent "Reset Drawings" button in the Drawing Tools tab.Single-tap functionality to clear all drawings instantly for users who prefer a fresh start.