Rebuild PlantRun around a calm garden workspace

[NicoM701]

What changed

• replaces the rejected sidebar/detail dashboard with a clean-sheet garden overview and dedicated run workspace
• adds named plants, editable phase plans, and a four-step guided setup
• makes custom phase transitions work in the backend instead of rejecting them
• redesigns sensors as Recorder-first intelligence cards and notes as a chronological journal
• preserves existing runs, services, bindings, SeedFinder enrichment, completion, yield, and history links
• adds responsive mobile behavior, focus visibility, reduced-motion support, light/dark themes, density, and optional sound
• versions every ES child module to prevent mixed old/new frontend caches

Validation

• 108 Python tests pass
• every PlantRun panel module passes Node syntax validation
• clean git diff --check`n- HACS v0.4.2 installed on Home Assistant 2026.7.1
• Home Assistant configuration valid, restart clean, integration loaded
• live signed-in Chrome QA completed at desktop and 390x844 mobile widths
• overview, run workspace, phase rail, and setup dialog visually verified
• no PlantRun browser-console or Home Assistant system-log errors