fix: backfill symbol_demand for sidebar-added symbols + analyst ratings schema fix

- Add await ctx.cache.subscribe() to addSymbol mutation so symbols
  added via the sidebar get registered in symbol_demand and yfinance
  jobs are queued immediately
- Backfill PEP, WYNN, STZ, CELH into symbol_demand + adapter_queue
- Upgrade yahoo-finance2 3.15.3 -> 3.15.4 and pass validateResult:false
  to quoteSummary() to handle Yahoo schema drift
- Add error detail logging for analyst ratings schema failures
- Update .gitignore with common ignores

app/src/components/MobileTabNav.tsx

@@ -27,17 +27,17 @@ export function MobileTabNav() {
   const pathname = usePathname();
 
   return (
-    <nav className="flex md:hidden border-t border-[#2a2b3a] bg-[#121318]">
+    <nav className="flex md:hidden border-t border-line-strong bg-surface-raised">
       {TABS.map((tab) => {
         const isActive = pathname === tab.href;
         return (
           <Link
             key={tab.href}
             href={tab.href}
-            className={`flex-1 flex flex-col items-center justify-center py-2 transition-colors focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-[#4f8cff] focus-visible:ring-inset ${
+            className={`flex-1 flex flex-col items-center justify-center py-2 transition-colors focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-accent focus-visible:ring-inset ${
               isActive
-                ? "text-[#4f8cff] border-b-2 border-b-[#4f8cff]"
-                : "text-[#8a8b9a] hover:text-[#e6e7ec]"
+                ? "text-accent border-b-2 border-b-accent"
+                : "text-fg-muted hover:text-fg"
             }`}
           >
             <span className="text-base">{tab.icon}</span>