feat(app): scroll-through day sections with midnight dividers (v0.11.0)

Replace the 어제/오늘/내일 buttons with a vertically scrolling list of
per-day tide sections. Each section's sticky header acts as the 0시
divider, showing date · multtae · tide range; the curve continues across
midnight via prev/next edge events. New DaySection component lazy-loads
one day at a time via IntersectionObserver. Official stations scroll up
to 14 days; model (arbitrary-coord) spots stop at the ~7-day forecast
window with an inline note. Now-line label centered to avoid the
right-side astro markers.

Constraint: model tide forecast depth is ~7 days; official is effectively unbounded (verified 2027 still returns extrema)
Confidence: high
Scope-risk: module
Reversibility: moderate
Directive: real-device check on IntersectionObserver scroll + sticky headers in Capacitor webview
Tested: tsc+vite clean, Playwright mobile-viewport screenshots (today + 6/7→6/8 boundary) confirm layout, debug APK built+served (content-length match)
Not-tested: on-device scroll/sticky behavior, 14-day deep scroll API load
Related: project_sea_and_catch


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