AKUNUR 2.10.2 - CAPTURED ECHO REMOVAL

Base
- Built from Akunur 2.10.1.
- Retains the Radius 7 standard opening, optional Free placement and direct Echo capture.

Captured Echo Pieces
- A captured ordinary stone still moves to its radial Echo Point unless captured on a corner or the Still Point.
- A captured Echo Piece is now removed permanently and does not move to its Echo Point.
- This applies regardless of whether the capturing stone is ordinary or itself an Echo Piece.
- The rule prevents a captured Echo Piece from bouncing across the board and immediately recapturing the stone that took it.
- It also allows a trailing player to clear opposing Echo Pieces that would otherwise create persistent opposite-corner blockades.

Interface and logging
- The move log explicitly states: "captured Echo Piece removed".
- Echo jump and Echo capture indicators remain unchanged.
- Header, feedback version and cache-busting asset versions are updated to 2.10.2.

Compatibility
- Existing ordinary capture displacement is unchanged.
- Corner and Still Point capture removal is unchanged.
- Echo Piece identity remains stored separately in state.echoPieces.
- Undo, repetition and AI simulation continue to include Echo Piece identity.

Version
2.10.2
