Classic UI for Forever

## 0.3.5 – frames like Classic, settings that stick

Player, target, focus and pet frames now match the Classic Era layout, taken from a
`/cui report all` on Era 1.15.9 and applied piece by piece on Forever.

- Frame art sits over the bars again, like Classic: the bevel covers the bar ends
  and separates health from mana. Forever locks the bar frames' draw order, so the
  classic art lives on a frame of the addon's just above them, with the level
  number and the combat/rested glow on it.
- Bar ends are square: the retail rounded masks are found where Forever keeps them
  and neutralised.
- Round portraits fill the frame ring edge to edge (no more dark gap).
- Level number in the frame corner in the small gold Classic font, kept gold after
  Blizzard's repaint. Combat icon, skull, raid marks and target auras draw above
  the art.
- Retail's red health-loss trail and animated rest glow are gone; the Classic "Zzz"
  rest icon is back.
- Pet frame: the small Classic frame with a 37px portrait, 69x8 bars, the Classic
  flash and attack glow.
- Settings now survive `/reload` on the Forever beta, which was not writing the
  addon's SavedVariables file: every on/off change is also stored in a CVar of the
  addon's, which the client does persist.
- Options: Select all / Deselect all buttons.
- `/cui probe` reports where the settings came from, and `/cui report` dumps the
  pet frame.

Reminders for Forever: type `/console nameplateStyle 6` once for Classic nameplates,
and `/console nameplateStyle 0` to go back to the modern ones. Anything that still
looks off: target a mob, `/cui report`, send the text with a screenshot.