Add configurable tick interval (time between trades)

- Seed tick_interval_seconds setting (default 60s)
- Expose tick_interval_seconds via GET/PATCH /api/settings
- startScheduler reads the setting at start time; enforces 5s minimum
- getSchedulerStatus returns intervalSeconds for the UI
- Main page: "Every [__] s" input in idle bar — saves on blur, persists across
  restarts; running state displays "every Ns" next to symbol/action

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

app/api/settings/route.ts

@@ -1,7 +1,7 @@
 import { NextRequest, NextResponse } from 'next/server';
 import { getSetting, setSetting } from '@/lib/db';
 
-const VALID_KEYS = ['max_concurrent_accounts'] as const;
+const VALID_KEYS = ['max_concurrent_accounts', 'tick_interval_seconds'] as const;
 type SettingKey = typeof VALID_KEYS[number];
 
 export async function GET() {

app/page.tsx

@@ -256,6 +256,7 @@ interface SchedulerStatus {
     action: 'Buy' | 'Sell' | 'Random';
     symbol: string;
     lastRun: string | null;
+    intervalSeconds: number;
 }
 
 export default function Home() {
@@ -270,10 +271,11 @@ export default function Home() {
     const [sortDir, setSortDir] = useState<SortDir>('asc');
 
     // Trade controls
-    const [scheduler, setScheduler] = useState<SchedulerStatus>({ running: false, action: 'Buy', symbol: 'NQ', lastRun: null });
+    const [scheduler, setScheduler] = useState<SchedulerStatus>({ running: false, action: 'Buy', symbol: 'NQ', lastRun: null, intervalSeconds: 60 });
     const [enabledSymbols, setEnabledSymbols] = useState<string[]>([]);
     const [tradeSymbol, setTradeSymbol] = useState('');
     const [tradeAction, setTradeAction] = useState<'Buy' | 'Sell' | 'Random'>('Buy');
+    const [tickInterval, setTickInterval] = useState('60');
     const [tradeLoading, setTradeLoading] = useState(false);
 
     const handleSort = (col: SortKey) => {
@@ -314,6 +316,13 @@ export default function Home() {
             })
             .catch(() => {});
 
+        fetch('/api/settings')
+            .then((r) => r.json())
+            .then((s: { tick_interval_seconds?: string | null }) => {
+                if (s.tick_interval_seconds != null) setTickInterval(s.tick_interval_seconds);
+            })
+            .catch(() => {});
+
         fetchConfig();
         fetchScheduler();
 
@@ -456,9 +465,10 @@ export default function Home() {
                             <span className="text-sm font-semibold text-green-700">
                                 {scheduler.symbol} · {scheduler.action}
                             </span>
+                            <span className="text-xs text-slate-400">every {scheduler.intervalSeconds}s</span>
                             {scheduler.lastRun && (
                                 <span className="text-xs text-slate-400">
-                                    last run {new Date(scheduler.lastRun).toLocaleTimeString()}
+                                    · last run {new Date(scheduler.lastRun).toLocaleTimeString()}
                                 </span>
                             )}
                             <button
@@ -501,6 +511,27 @@ export default function Home() {
                                         Random
                                     </button>
                                 </div>
+                                <div className="flex items-center gap-1.5 ml-1">
+                                    <label className="text-xs text-slate-400 whitespace-nowrap">Every</label>
+                                    <input
+                                        type="number"
+                                        min={5}
+                                        max={3600}
+                                        value={tickInterval}
+                                        onChange={(e) => setTickInterval(e.target.value)}
+                                        onBlur={() => {
+                                            const secs = Math.max(5, parseInt(tickInterval, 10) || 60);
+                                            setTickInterval(String(secs));
+                                            fetch('/api/settings', {
+                                                method: 'PATCH',
+                                                headers: { 'Content-Type': 'application/json' },
+                                                body: JSON.stringify({ tick_interval_seconds: secs }),
+                                            }).catch(() => {});
+                                        }}
+                                        className="w-16 rounded-lg border border-slate-200 bg-slate-50 px-2 py-1.5 text-sm text-right font-mono text-slate-800 focus:outline-none focus:ring-2 focus:ring-blue-500"
+                                    />
+                                    <span className="text-xs text-slate-400">s</span>
+                                </div>
                             </div>
                             <button
                                 onClick={handleStart}

lib/auto-trade.ts

@@ -336,8 +336,9 @@ export function startScheduler(action: 'Buy' | 'Sell' | 'Random', symbol: string
         }
     };
 
-    state.intervalId = setInterval(tick, 60_000);
-    console.log(`[scheduler] started — ${action} ${symbol} every 60s`);
+    const intervalSecs = Math.max(5, parseInt(getSetting('tick_interval_seconds') ?? '60', 10));
+    state.intervalId = setInterval(tick, intervalSecs * 1_000);
+    console.log(`[scheduler] started — ${action} ${symbol} every ${intervalSecs}s`);
 }
 
 export function stopScheduler() {
@@ -357,5 +358,6 @@ export function getSchedulerStatus() {
         action: state.action,
         symbol: state.symbol,
         lastRun: state.lastRun,
+        intervalSeconds: parseInt(getSetting('tick_interval_seconds') ?? '60', 10),
     };
 }

lib/db.ts

@@ -161,6 +161,7 @@ db.exec(`
 // Seed defaults if missing
 const seedSetting = db.prepare(`INSERT OR IGNORE INTO settings (key, value) VALUES (?, ?)`);
 seedSetting.run('max_concurrent_accounts', '5');
+seedSetting.run('tick_interval_seconds', '60');
 
 export function getSetting(key: string): string | null {
     const row = db.prepare('SELECT value FROM settings WHERE key = ?').get(key) as { value: string } | undefined;