Move timings in PGN

• FICS history Review preserves per-move elapsed times and reconstructs remaining clocks from the initial time and increment when available.
• Lichess profile Review now requests clock history and calculates missing elapsed times using the increment, including recent and notable games.
• Added a Time column to Game Moves, with White and Black elapsed times stacked and remaining clocks in hover details.
• Added per-move time spent (%emt) and time remaining (%clk) to plain PGN, annotated PGN, and copied moves.
• Record local clock time after increment; untimed games include time spent only.
• Preserve imported mainline timing values and fractional precision, plus the imported TimeControl header.
• Keep timing with saved games, backups, and analysis JSON. Undo and branching discard timings for discarded moves.
• Record server-provided clocks for FICS and Lichess without inventing elapsed times for missing move history.

See PGN move timings for examples and availability.