v0.31.5 — Real conflict detection in mass-launch review

Added

• Real conflict detection in the mass-launch review. The QueueConfirmation screen now parses each issue's ## Files to Modify section from its cached body, so overlapping file claims surface as actual conflicts (with the shared paths) before a 2+ session launch — instead of every issue reading "unknown scope." Issues that declare no file scope still fall back to the unknown-scope warning. (follow-up to #1020/#1024)