v1.2.5

Fixed

• Card now sizes correctly in the HA sections (grid) view. Two changes were required:
  1. Implemented getGridOptions() so HA knows the card's default grid dimensions
     (6 columns x 2 rows, resizable down to 3 columns x 1 row).
  2. Added height: 100% to :host and ha-card, with flexbox vertical centering,
     so the card fills the full height allocated by the grid cell.
     Previously, the card only implemented getCardSize() (masonry layout only) and had no
     height-fill CSS, causing it to shrink to content size regardless of the assigned row count.
     Fixes issue #9 reported by @phil11c.