v0.2.0

TaskTick 0.2.0

A full UI overhaul. Liquid Glass, a working desktop layout, and TickTick's
calendar.

This release is mostly a foundation fix. The UI problems reported were
structural, not cosmetic:

• The desktop content area was literally off-screen. The sidebar sat in a
  flex-1 wrapper inside a column flex container, so it consumed a full-width
  row and pushed below the fold. A fixed nav bar on top of that
  spanned the sidebar and buried its header.
• tailwind-merge did not know this project's custom tokens, so
  cn('text-footnote', 'text-secondary') silently dropped the font size. Every
  custom size combined with a colour fell back to the body size, app-wide,
  with no error.

What the UI is now:

• A real app shell: fixed-height frame, sidebar and content as independent
  scroll panes, sticky translucent chrome, nothing scrolling the document.
  CSS-driven breakpoints, so a desktop visitor never sees the mobile layout
  flash first.
• Liquid Glass as four layers — tint, backdrop blur, specular rim, ambient
  shadow — with a masked gradient border that follows any corner radius, and
  a dark appearance tuned separately rather than dimmed. An ambient tinted
  mesh sits behind everything so translucent surfaces have colour to refract.
• Calendar in TickTick's shape: month grid on top, the selected day's agenda
  below, defaulting to today, collapsing to a week strip, and side-by-side
  with an agenda column on desktop. Cached pills instead of dashed outlines,
  so month cells show readable labels.
• One consistent, non-truncating habit row for all four goal types.
• Corrected back controls, correctly centred progress ring, per-variant
  disabled buttons, and visible text inputs.

Verified by screenshot at 390x844 and 1440x900 after the type-size fix changed
layout app-wide: 548 unit tests, clean typecheck, no horizontal overflow on any
route, and no content trapped behind the tab bar.

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Full Changelog: https://github.com/ksmarty/tasktick/commits/v0.2.0