Cuts 0.54.14. Repairs the [Unreleased] changelog state left by three PRs that merged since v0.54.13 without proper changelog hygiene, sweeps dead code orphaned by #305 and earlier PRs, and bumps the version.
- CHANGELOG: #307 bullets moved out of the released [0.54.10] section into [Unreleased]; backfilled missing entries for #305 (Removed) and #308 (Changed); [Unreleased] -> [0.54.14] release cut.
- pyproject.toml: 0.54.13 -> 0.54.14.
- app/web/router.py: removed orphaned gws_oauth / instance_admin_email / connector_prompts keys from the shared _build_context ctx dict.
- app/web/templates/home_not_onboarded.html: swept dead connector-tile, automode, and setup-collapsible/minimize CSS + the orphaned JS click-wiring.
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