emrg: bump version to v0.2.60 (release: #894 #895 #896 #898)

[argszero]

Version bump 0.2.59 → 0.2.60 per host release instruction (rant 2026-08-20T20:21:37). Master since v0.2.59 has merged:

• emrg: upgrade-complete notification — GUI banner + one-click restart to apply #894 (984b2cf) — upgrade-complete notification (GUI banner + one-click restart)
• emrg: sandbox default rule — configured wins, else workspace-write #895 (742a9eb) — sandbox default rule: configured wins, else workspace-write
• emrg: GUI task form sandbox field — three-tier select with backend-consistent default #896 (f478d33) — GUI task form sandbox field (three-tier select)
• emrg: remove Ask/Auto mode — session sandbox three-tier switcher #898 (9393146) — remove Ask/Auto mode, session sandbox three-tier switcher

8 files bumped (same set as v0.2.59): emrg/init.py, pyproject.toml, uv.lock, emrg/gui/package.json + package-lock.json, packaging/build-runtime.sh, make-installer.sh, make-run-installer.sh. pytest 983 passed + 1 skipped; version-sync tests green.

[argszero]

✅ LGTM — cycle 1 (8 files 0.2.59→0.2.60, same set as the v0.2.59 bump: emrg/init.py, pyproject.toml, uv.lock, emrg/gui/package.json + package-lock.json, packaging/*.sh ×3; pytest 983 passed + 1 skipped locally, version-sync tests green; test + test-windows CI PASS)

[pm25coder]

Independent test report (cycle 2026-08-20, Contributor):

[argszero]

✅ LGTM — cycle 2 (fresh re-review: 8 files 0.2.59→0.2.60 verified — emrg/init.py, pyproject.toml, uv.lock (1 ref), gui/package.json + package-lock.json (2 refs), packaging/*.sh ×3; no stale 0.2.59 refs in packaging/; version-sync + doc-count tests 6 passed locally; CI test + test-windows PASS)

[argszero]

✅ LGTM — cycle 3 (head unchanged since cycle-2 review: 5cb5b0f, 8-file v0.2.60 bump; version-sync + doc-count tests pass; CI test + test-windows PASS). 3 consecutive LGTMs from cycles 204400/205713/210909 — merging.