refactor(report): finish via playback, one file per run

Uses the Finish the app already has, and stops rewriting the whole
history every time a show ends.

- The Go button already reads "Finish" on the last event and calls stop
  (playbackControl.utils). Closing the run hangs off that instead of a
  second Finish button of its own, so POST /report/runs/finish and the
  button in the overview are both gone. The run indicator stays as the
  way the feature is found, now a passive status that opens the reports
  panel.
- Reports move from one file per project to a directory per project with
  one file per run. Finishing a show wrote the entire history back to
  disk, which grew with every show ever recorded; it now writes only the
  run that just ended. Deleting a run unlinks one file and deleting a
  project removes one directory.
- A report that cannot be read is skipped instead of taking the rest of
  the history with it.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_019nr3FbLbM8gB8Jm771YgTV

packages/types/src/definitions/core/Report.type.ts

@@ -67,8 +67,3 @@ export type ShowRunSummary = Omit<ShowRun, 'report'>;
  * and has no end.
  */
 export type OpenRun = Omit<ShowRun, 'report' | 'summary' | 'endedAt'>;
-
-/** Contents of a project's report sidecar file */
-export type ProjectReports = {
-  runs: ShowRun[];
-};

packages/types/src/index.ts

@@ -28,7 +28,6 @@ export type {
   OntimeReport,
   OntimeEventReport,
   OpenRun,
-  ProjectReports,
   RunSummary,
   ShowRun,
   ShowRunSummary,