Literal Dotenv to Selected-Value Support Copy

Parse literal dotenv assignments, replace explicitly selected JSON paths and produce stable JSON for manual support review. Existing Base64/HTML reading copies change encoding/whitespace only. This parses a named literal dotenv grammar, then explicitly replaces chosen original JSON values before a support copy is emitted. It does not identify secrets automatically and never claims all sensitive content removed.

• Each downstream CSV/JSON input remains limited to 5 MiB; a larger completed intermediate stays a checkpoint and final success is refused. Originals/checkpoints retain omitted or replaced values. Input1MiB/10,000 literal assignments, DTH literal dotenv v1 only; UTF-8 TXT copy or pasted text. No OS environment read, interpolation or shell execution. Every pointer must exist against the original parsed JSON; duplicate/ancestor-overlapping paths reject. Up to1000 pointers/256KiB total pointer text. The primary-only connection deliberately omits standalone redaction-report.json; applied paths/counts remain available in the unchanged standalone UI. No secret detection, all-secrets-removed, anonymization or security certification. Review every retained value before sharing; originals/parsed checkpoints still contain secrets.
• No native other-browser/physical-device/heap-erasure acceptance is established.