Perch v1.38.0

feat(branding): ship the icon refresh and the settings mascot

The approved mockups, implemented. perch.ico is regenerated from the
bird-on-the-wire tile at 16/20/24/32/48/256 with per-size simplification
(chain sheds first, then brow; 20px and under is the lens + eye), rendered
from design-loop/branding/icon-tiles.html so it stays reproducible.
perch-logo.png is the full 256 tile (empty states); the new perch-glyph.png
carries the min tier for small placements (sidebar identity mark, site
favicon). The settings page gains its resident: Monocle Guy in a hard hat
balancing an oversized wrench on his nose, bottom-right of every pane,
hidden when the window is too narrow to keep him clear of the rows.
Workspace shot recaptured with the new marks; site rebuilt.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01PVsaVn8wMeBGeerekR1KDn