Consolidate Clockwork Owl v2 into the canonical shared theme
## Scope
Promote the final approved `hermanity.dev` midnight/brass/ivory Clockwork Owl design system into the canonical shared Hugo theme. Consolidate reusable child-site primitives into the master theme, keep `themes/hermanity` and `presets/agent` in parity, remove the rejected skull/keyhole owl glyph, and add regression contracts.
## Acceptance
- Canonical final typographic HERMAN identity
- Reusable child-site styles promoted as generic primitives
- No project-specific selectors in the master theme
- `make sync-presets` parity
- Full local CI-equivalent verification
- Exact-head Senate review before human merge handoff
Picking this up now. Implementation will be isolated on `feat/clockwork-v2-canonical-consolidation`; no direct push or force-push to `main`.
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