done column: hover 'back to review' to re-queue a done/errored plan

adds POST /api/review/:id/reopen that flips done or errored plans back
to pending, clears the lingering job row, resets verified=0, and keeps
the prior ffmpeg error summary in the plan's notes so the user has
context for redeciding.

done column cards grow a hover-only '← back to review' button next to
the status badge — works identically for both the ✓/✓✓ and the ✗ rows,
since the server accepts either. also hid the existing queue card's
back-to-review behind the same hover affordance so the two columns
behave consistently and the cards stay visually calm when not hovered.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

package.json

@@ -1,6 +1,6 @@
 {
 	"name": "netfelix-audio-fix",
-	"version": "2026.04.14.21",
+	"version": "2026.04.14.22",
 	"scripts": {
 		"dev:server": "NODE_ENV=development bun --hot server/index.tsx",
 		"dev:client": "vite",