0.2.35: exited positions show history clipped at the exit date

The eNAV keeps producing statements after an exit (quarterly for funds,
event-driven for SPVs), so an unfiltered graph would crash to zero.
Now the exited card gets its collapsible History back — chart + table
showing the capital journey up to exited_on only. Post-exit statements
stay recorded (audit trail; Undo restores full history) but are never
plotted. History section extracted into a shared HistorySection
component; toggle counts "statements" not "quarters" (SPV statements
are event-driven).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

frontend/src/version.ts

@@ -1,4 +1,4 @@
 // Bumped each release so the running build is visible in the UI.
 // If the number shown in the app doesn't match the installed s9pk version,
 // the new frontend isn't actually being served.
-export const APP_VERSION = "0.2.34";
+export const APP_VERSION = "0.2.35";