refactor: sweep leaky naming suffixes

[kostyafarber]

Summary

• remove a first batch of leaky suffix names across bridge, persistence, editor, and glyph-info code
• rename transient select and pen helper types to more intentional names
• tighten docs and exported aliases to match the naming direction

Included in this PR

• payload/data/state/descriptor/result renames in the touched TS and Rust bridge surfaces
• -> , ->
• select drag-state helper renames (, , etc.)
• pen helper renames (, )
• alias removal in favor of

Validation

@shift/desktop@0.0.1 typecheck /home/firmclaw/repos/shift/apps/desktop
tsc --noEmit -p tsconfig.build.json

@shift/validation@0.0.1 test /home/firmclaw/repos/shift/packages/validation
vitest run

Notes

• this is intentionally a first sweep from the naming ticket, not the entire naming program
• manager renames and the domain refactor should stay separate