Plan gating

None of this domain is plan-gated.

• Memory: available on every plan: Free, Pro, Pro (Legacy) and Pro w/ AI Employee alike.
• Command palette: available on every plan, always on, no toggle. (Entity results and the "Open Memory" row need the graph beta enabled on that device.)
• Library search: available on every plan.
• Entities and content tags: generated on every plan, for any content that goes through transcription or URL/PDF ingest.
• Related-content threads: every plan.

The only real gate is upstream: these features have nothing to show until content has actually been transcribed or ingested, and that is where plan limits (recording minutes, storage) apply.