Add a bulk wipe & recalculate button to the dashboard

The per-account wipe works one account at a time; when every account is
carrying stale cached rows (the pre-roll dates again), that's a lot of
clicking. POST /api/accounts/wipe-all drops the cached rows for every
account on every firm and rebuilds them all from fresh reports — firms
in parallel, accounts within a firm at fetchDaysTraded's own pacing.
The toolbar button confirms inline with the same 28-day-window warning.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

app/api/accounts/wipe-all/route.ts

@@ -0,0 +1,39 @@
+import { NextResponse } from 'next/server';
+import { getClients } from '@/lib/clients';
+import { wipeAccountData } from '@/lib/db';
+
+/**
+ * POST /api/accounts/wipe-all — the bulk form of /api/accounts/[id]/wipe:
+ * drop every account's cached rows on every firm and rebuild them all from
+ * fresh Tradovate reports. One report per account, so this takes a while on
+ * big rosters; firms run in parallel, accounts within a firm sequentially
+ * (that's fetchDaysTraded's own pacing against the flaky report server).
+ *
+ * Same destructive caveat as the single wipe: cached rows older than the
+ * report's 28-day window cannot be refetched. The UI confirms first.
+ */
+export async function POST() {
+    const clients = [...getClients().values()];
+
+    let wiped = 0;
+    let failedAccounts = 0;
+
+    await Promise.all(clients.map(async (client) => {
+        for (const account of client.accountList) {
+            wipeAccountData(account.id);
+            delete client.dailyPnL[account.id];
+            delete client.fullDailyPnL[account.id];
+            delete client.daysTraded[account.id];
+            delete client.priorProfit[account.id];
+            delete client.lastFundDates[account.id];
+            delete client.fundTransactions[account.id];
+            delete client.lastFetchErrors[account.name];
+            delete client.lastFetchRaw[account.name];
+            wiped++;
+        }
+        const result = await client.fetchDaysTraded();
+        failedAccounts += result.failedAccounts;
+    }));
+
+    return NextResponse.json({ ok: true, wiped, failedAccounts });
+}