[Task] track OINK homepage visual directions

## Purpose

Track the homepage visual history for the OINK 1.0 migration without replacing earlier evidence. Each visual checkpoint will be added as a separate comment with its screenshot, immutable source/artifact commits, viewport, theme, and image checksum.

## Planned snapshots

- V0: Docsy production baseline
- V1: initial OINK migration shell before visual selection
- V2: retained alternative direction (split documentation entry)
- V3: selected direction (brand scene recomposition) after implementation and staging verification

The migration implementation remains in #466. This issue is only the durable design comparison timeline; it does not change the selected direction by itself.

## Decision

Direction 1 is selected for the migration. Direction 2 is retained here as a future alternative so its layout can be revisited without reconstructing the original comparison.

Read the migration implementation in #466 and review the existing comments on this issue before adding timeline entries. Done means the V0–V3 checkpoints preserve their screenshots, immutable source or artifact commits, viewport, theme, and image checksum, with Direction 1 marked selected and Direction 2 retained.

Written by the indexing model from the issue text.