[P3][MEM-02] Opt-in adaptive patterns and declared lenses

Programme: #1
Epic: #29

## Objective
Let the runtime learn presentation/relevance patterns and declared viewpoints without turning inferred beliefs into hidden truth filters.

## Scope
- Opt-in pattern inference from repeated explicit corrections/layout choices/workflows.
- Separate inferred pattern records from confirmed preferences.
- Sensitivity classifier/policy preventing durable sensitive inferences without deliberate consent.
- “Why did this adapt?” explanations and one-click correction/disable.
- Declared lenses/viewpoints as explicit user-selected ranking/presentation inputs.
- Stable layout adaptation through UI-03 review/lock mechanics.
- Conflict handling when a new pattern contradicts a locked/explicit preference.

## Product rules
- Personalization changes presentation/relevance, not source evidence.
- A declared lens is labeled and cannot silently remove contradictory credible evidence.
- Sensitive political/health/religious/etc. inferences must not become durable hidden preferences by default.

## Acceptance criteria
- [ ] Every adaptive change can identify the preference/pattern that caused it.
- [ ] Inferred patterns remain distinguishable from user-confirmed preferences.
- [ ] Sensitive inferred beliefs cannot silently become durable facts/preferences.
- [ ] User correction/lock overrides future adaptation.
- [ ] Declared lenses retain contradictory evidence/source access.
- [ ] Disabling adaptive patterns leaves explicit preferences and workspace functionality intact.

## Dependencies
- MEM-01
- UI-03

**First phase:** P3
**Maturity target:** P5
**Owner:** workspace-ui-data

No files, tests, or entry points are named. Start by reading MEM-01 and UI-03, then define how inferred patterns, confirmed preferences, sensitivity policy, explanations, lenses, and locks interact; done means all acceptance criteria are covered without hiding contradictory evidence or breaking explicit preferences.

Written by the indexing model from the issue text.