Release Gloss 1.0.2 with reusable PDF exports and update reminders

[SunChJ]

Summary

• prepare the 1.0.1 and 1.0.2 release metadata and bump the app to version 1.0.2 (build 15)
• keep the alternating-page gloss-dual.pdf as a reusable bilingual master
• add scripts that derive permanent side-by-side and translation-only PDFs without translating again
• proactively remind users when the signed update channel reports a newer Gloss release
• let verified Homebrew installations update and restart directly from the reminder
• queue a confirmed update while translation work is active, then continue automatically when the work finishes

Why

BabelDOC's bilingual output is useful as a lossless source artifact, but its alternating pages depend on viewer settings for side-by-side reading and are inconvenient for translation-only reading. The new exporters make both presentations available locally without another model pass.

Gloss already had signed update discovery and a verified Homebrew upgrade helper, but discovered updates were easy to miss because they were primarily visible in Settings and the status menu. This closes the user-facing loop with an actionable reminder wired to the existing verified installer.

User impact

• Scripts/export_pdf_side_by_side.sh creates one horizontal spread per source/translation pair.
• Scripts/export_pdf_translation_only.sh extracts the translated half of each pair.
• Both exporters preserve vector/searchable PDF content, metadata, and require complete page pairs.
• Official Homebrew users can choose Update and Restart from the reminder.
• Unmanaged installations are directed to the official release page.
• Active translation tasks are not interrupted; confirmed updates continue afterward.

Validation

• swift test --parallel
• targeted App update controller and dashboard-state tests
• Swift format lint and git diff --check
• both PDF exporters exercised on a 40-page bilingual paper
• generated 20-page side-by-side and translation-only PDFs checked at the beginning, middle, and end for ordering, clipping, legibility, metadata, and searchable text