Scanner: expand default watchlist from 15 to 37 sector-diversified names

The previous default leaned heavily on mega-cap tech. EDGE setups
are rarer than that — you want a wider net across sectors to catch
the 1-3 setups per week that actually qualify. Curated to 37 names
that are all optionable mid+ cap with reasonable LEAPS liquidity:

  Indices/ETFs: SPY, QQQ, IWM, DIA, SMH, XLF, XLE, XLK
  Mega-cap tech: AAPL, MSFT, NVDA, GOOGL, META, AMZN
  Semis: AMD, INTC, TSM, AVGO, MU
  High-vol/event-driven: TSLA, NFLX, COIN, PLTR, SHOP, UBER, MARA
  Financials: JPM, BAC, GS, V
  Healthcare: LLY, JNJ, UNH
  Consumer/energy: XOM, WMT, DIS, MCD

Also bumped the per-scan cap from 30 to 100 so users can paste
custom lists up to 100 symbols (the previous 30-cap silently
truncated lists like the new 37-name default).

Full default scan completes in ~3.5s with zero errors and correctly
surfaces only the genuine EDGE setups (live test: NVDA / INTC / AAPL
flag, the other 34 do not).

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

frontend/scanner.html

@@ -216,7 +216,24 @@
   <script src="/assets/alpine.min.js" defer></script>
 
   <script>
-    const DEFAULT_SYMBOLS = ["SPY","QQQ","IWM","DIA","AAPL","MSFT","NVDA","GOOGL","META","AMZN","TSLA","AMD","NFLX","COIN","INTC"];
+    // Curated default watchlist (~37 names) — sector-diversified, all optionable mid+ cap.
+    // Backend caps custom lists at 100 symbols.
+    const DEFAULT_SYMBOLS = [
+      // Indices & sector ETFs
+      "SPY","QQQ","IWM","DIA","SMH","XLF","XLE","XLK",
+      // Mega-cap tech
+      "AAPL","MSFT","NVDA","GOOGL","META","AMZN",
+      // Semiconductors
+      "AMD","INTC","TSM","AVGO","MU",
+      // High-vol / event-driven
+      "TSLA","NFLX","COIN","PLTR","SHOP","UBER","MARA",
+      // Financials
+      "JPM","BAC","GS","V",
+      // Healthcare
+      "LLY","JNJ","UNH",
+      // Consumer / energy
+      "XOM","WMT","DIS","MCD",
+    ];
 
     function scannerApp() {
       return {