chore(main): release 2.12.0

[pmaxhogan]

🤖 I have created a release beep boop

2.12.0 (2026-08-18)

Features

• app: opt-in debug logging mode and safer, richer diagnostic bundles (#314) (33c281c)
• core: allow nested backup sources when the parent excludes the child (#294) (0b62df9)
• core: live exclusion pickup and a visible pending-work queue (#313) (e6427c7)
• live bottleneck indicator on the Activity dashboard (#311) (2d9d763)
• ui: folder picker sort/filter/create/rename and exclusions size rollups (#315) (7e87341)

Bug Fixes

• app: never freeze on tray quit during a backup; quitting tray state; honest recovery status (#312) (f951cde)
• clear the attention banner after a passing run and make source removal backend-aware (#310) (6d8e1ab)
• s3: honest per-source versioning across backends and multipart-upload leak sweep (#316) (d462592)

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This PR was generated with Release Please. See documentation.

[github-actions]

Coverage

Area	main	this PR	delta
Rust (lib crates)	84.45%	84.37%	-0.08 (OK)
UI (vue/ts)	93.40%	93.42%	+0.02 (OK)

Gate: passed - no coverage regression (epsilon 0.1 pp).

[pmaxhogan]

🤖 Created releases:

• v2.12.0

🌻