Replace rejected owl glyph with premium Clockwork Owl identity art
## Operator rejection
The current flat owl glyph used in the default social card/header/footer was explicitly rejected as cheap, disgusting, and damaging to the established premium Clockwork Owl brand. It reads like an icon-font mascot instead of the cinematic brass-and-midnight identity already present in the site's hero artwork.
## Fix
- remove the rejected flat owl glyph from public header/footer identity surfaces
- stop using the square Android app icon as the default OpenGraph/Twitter image
- promote a premium, clearly mechanical Clockwork Owl portrait from the approved 16:9 art direction as the default social card
- show that premium Clockwork Owl visibly on the apex homepage
- preserve page-specific cover metadata, apex contracts, accessibility, and responsive behavior
- add regression tests preventing the rejected app icon from returning as social identity
## Boundary
Apex `hermanity.dev` only. No subdomain or estate rollout. Human merges.
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