Roam 0.12.0

What's Changed

• chore: Bump version.txt to 0.12.0-SNAPSHOT by @dmccoystephenson in #430
• feat: Add craftable storage containers (Chest) (#346) by @dmccoystephenson in #431
• ux: world & inventory feedback — 4 fixes from Nielsen heuristics by @dmccoystephenson in #432
• docs: frontend abstraction (Renderer + InputSource) migration plan by @dmccoystephenson in #440
• refactor: shared UI color palette (Phase 0 — frontend abstraction) by @dmccoystephenson in #441
• refactor: Renderer output seam, part 1a — interface + 9 screens (epic #433) by @dmccoystephenson in #442
• refactor: Renderer output seam, part 1b — worldScreen + EnergyBar (closes #435) by @dmccoystephenson in #443
• refactor: backend-neutral geometry Rect — Phase 2a (epic #433) by @dmccoystephenson in #444
• refactor: Renderer image loading/scaling — Phase 2b-1 (epic #433) by @dmccoystephenson in #445
• refactor: Room + entity image ownership → Renderer — Phase 2b-2 (closes #436) by @dmccoystephenson in #446
• refactor: frontend factory (PygameFrontend) — Phase 3a (epic #433) by @dmccoystephenson in #447
• refactor: Screen base class — Phase 3b-1 (epic #433) by @dmccoystephenson in #449
• fix: startup crash 'video system not initialized' (regression from #447) by @dmccoystephenson in #450
• refactor: Screen base class — Phase 3b-2 mouse-driven screens (closes #437) by @dmccoystephenson in #451

Full Changelog: 0.11.0...0.12.0