feat(workout): correct last set from local events

Add a recovery path for mistyped completed-set weight: append a typed correction event, replay it through the local projection, and make undo restore the previous session state.

req: examples/001

req: local/001

req: local/003

req: local/004

examples/workout/templates/workout.css

@@ -174,6 +174,11 @@
     gap: 0.55rem;
     align-items: end;
   }
+  .recovery-tools {
+    border-top: 1px dashed var(--line);
+    border-bottom: 1px dashed var(--line);
+    padding-block: 0.15rem;
+  }
   .micro-form label,
   .voice-strip label {
     display: grid;
@@ -210,6 +215,9 @@
     border-top: 1px dashed var(--line);
     padding-block-start: 0.35rem;
   }
+  .recovery-tools .micro-form {
+    margin-block-end: 0.55rem;
+  }
   .host-proof p {
     margin-block-end: 0.7rem;
     font-size: 0.92rem;