Add test coverage for 5 components: HpAdjustPopover, ConditionPicker, CombatantRow, ActionBar, SourceManager

Adds aria-label attributes to HP placeholder and source delete buttons
for both accessibility and testability.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

apps/web/src/components/combatant-row.tsx

@@ -231,6 +231,8 @@ function ClickableHp({
 					"inline-block h-7 w-[4ch] text-center text-muted-foreground text-sm tabular-nums leading-7",
 					dimmed && "opacity-50",
 				)}
+				role="status"
+				aria-label="No HP set"
 			>
 				--
 			</span>