Add replayable debug reports.

A report dumps everything needed to understand a game that went wrong:
the full state (decks card by card, shop row and tier deck order,
discards, pending choices, banked Mana/Trumpets/apples), the round's
battles, and the whole event log. Available as JSON, which replays, or
text, which reads — and the text ends with a paste-ready repro test.

Battles now record the randomness they consume alongside what they
started from, so a result can be replayed long after the round cleared
those banks: same lineups, same dice, same events, down to the log text.
Results predating the recording say so rather than quietly re-rolling.

Three ways in: the 🐛 panel's download/copy buttons, GET
/api/debug/report (DEBUG-only, since a report holds both players' hands
and the shop deck order), and `mise run report`, which reads the
database directly so a live game can be dumped without DEBUG.

web/src/styles.css

@@ -3536,6 +3536,49 @@ h3 {
   margin-bottom: 8px;
 }
 
+/* The report buttons sit above the card list, small and out of the way — they
+   are used once a session, when something has already gone wrong. */
+.debug-report {
+  display: flex;
+  flex-wrap: wrap;
+  align-items: center;
+  gap: 6px;
+  margin-bottom: 12px;
+  padding-bottom: 12px;
+  border-bottom: 1px solid rgba(255, 255, 255, 0.15);
+  font-size: 0.75rem;
+}
+
+.debug-report-btn {
+  background: rgba(255, 255, 255, 0.1);
+  color: var(--cream);
+  border: 1px solid var(--cocoa);
+  border-radius: 6px;
+  padding: 5px 8px;
+  font: inherit;
+  font-weight: 700;
+  text-decoration: none;
+  cursor: pointer;
+}
+
+.debug-report-btn:hover {
+  background: rgba(255, 255, 255, 0.2);
+}
+
+.debug-report .muted {
+  flex-basis: 100%;
+}
+
+.debug-note {
+  flex-basis: 100%;
+  background: rgba(0, 0, 0, 0.3);
+  color: var(--cream);
+  border: 1px solid var(--cocoa);
+  border-radius: 6px;
+  padding: 5px 8px;
+  font: inherit;
+}
+
 .debug-tier-label {
   color: var(--cream);
   font-size: 0.75rem;