V3 — rebuilt interface

The interface was rebuilt. The engine was not: extraction, downloading and the CLI are the same code they were in 2.1.

Added

• A cold open. The mark draws itself on as a vector, the wordmark resolves out of a
  blur, a raking beam crosses the field, and the card cascade is held — not merely
  delayed — until it hands over. Under two seconds, ended instantly by any key or click,
  and removed from the DOM when it finishes.
• The mark is an SVG and it moves. Crescent and orbit are separate shapes, so the ring
  tilts continuously: the minor radius is what animates, which reads as a rotation in
  depth. The same drawing now serves the topbar, the cold open and the empty state, and
  the PNG survives only as the favicon.
• A hero band replaces the four stat cards. The rate is a 49px figure with the plot
  spanning the card underneath; completed, downloaded and ETA are reference and sit small.
• The settings column is one surface. Five floating cards became four sections of a
  single panel divided by a hairline, with Start built into the same object.
• Transfer rows carry their provider, read off the source URL, and their weight follows
  their state: what is moving gets room and a brighter name, what has finished tightens
  and recedes.
• Filter box and state chips over the transfer list. Presentation only — rows are
  hidden, and no count the engine owns is recomputed.
• Drag and drop of links or a .txt anywhere on the window, appended rather than
  replacing what is already there.
• Keyboard shortcuts — Ctrl+Enter, Ctrl+O, /, ?, Esc — with a shortcut panel.
• Copy the source link per row, and an end-of-run summary that reads the last snapshot
  and can copy every failed link.
• Idle motion. The blooms drift, a glint travels the topbar hairline, the wordmark
  catches a sheen and Start shows one while it waits. All slow, and none of them claiming
  that anything is happening.

Changed

• One higher-contrast palette. The dimmest text tier moves from #55677f to #97a9c1
  and the background photograph is pushed back — a real legibility gain in a bright room.
• The speed plot. The head dot leaves the SVG: the plot is drawn with
  preserveAspectRatio="none", which was rendering a <circle> as a flat ellipse. The
  area wash comes down, and a recessive hairline marks the window mean, since a plot
  scaled to its own peak cannot otherwise tell steady from spiky. It is drawn only when
  there is signal to average.
• View Transitions on the Transfers/Log swap, behind a capability check.
• Scroll-driven edge fades on the scrollers, applied to the edge that actually has
  content past it; when a list does not overflow there is no mask at all.
• The prefers-reduced-motion block is gone, deliberately. Windows reports "reduce"
  whenever its own animation setting is off, and every version of honouring that here
  removed the thing the release is for — first the whole design, then the cold open, then
  the logo orbit and the wordmark sheen. The GUI now animates for everyone. Nothing
  flashes and every loop is slow, but this is a stated choice rather than an oversight,
  and a motion preference is the obvious thing to add if anyone asks for one.
• VERSION was still v2.0 after the 2.1 release, so the app under-reported itself for a
  whole version. It now tracks the tag again, at v3.0.

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Full changelog: https://github.com/LeyckerS/moondownloader/blob/main/CHANGELOG.md