e82c9f8bbd
Clicking the current-turn row in the header turn navigator while already viewing it routed through returnToCurrent() → viewTurn(currentTurn), which re-fetches the live report and flips the view through `loading`. At turn 0 the only row is the live turn, so the dropdown always fired a pointless backend round-trip and redraw. Guard goToTurn() against re-selecting the on-screen turn (turn === viewedTurn): just close the popover and stop. Leaving history is unaffected — there the viewed turn differs from the target. Closes #45 Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>