feat: premium finance stock analysis suite (#1268)

* Add premium finance stock analysis suite

* docs: link premium finance from README

Add Premium Stock Analysis entry to the Finance & Markets section
with a link to docs/PREMIUM_FINANCE.md.

* fix: address review feedback on premium finance suite

- Chunk Redis pipelines into batches of 200 (Upstash limit)
- Add try-catch around cachedFetchJson in backtest handler
- Log warnings on Redis pipeline HTTP failures
- Include name in analyze-stock cache key to avoid collisions
- Change analyze-stock and backtest-stock gateway cache to 'slow'
- Add dedup guard for concurrent ledger generation
- Add SerpAPI date pre-filter (tbs=qdr:d/w)
- Extract sanitizeSymbol to shared module
- Extract buildEmptyAnalysisResponse helper
- Fix RSI to use Wilder's smoothing (matches TradingView)
- Add console.warn for daily brief summarization errors
- Fall back to stale data in loadStockBacktest on error
- Make daily-market-brief premium on all platforms
- Use word boundaries for short token headline matching
- Add stock-analysis 15-min refresh interval
- Stagger stock-analysis and backtest requests (200ms)
- Rename signalTone to stockSignalTone

src-tauri/sidecar/local-api-server.mjs

@@ -136,7 +136,7 @@ globalThis.fetch = async function ipv4Fetch(input, init) {
 };
 
 const ALLOWED_ENV_KEYS = new Set([
-  'GROQ_API_KEY', 'OPENROUTER_API_KEY', 'FRED_API_KEY', 'EIA_API_KEY',
+  'GROQ_API_KEY', 'OPENROUTER_API_KEY', 'TAVILY_API_KEYS', 'BRAVE_API_KEYS', 'SERPAPI_API_KEYS', 'FRED_API_KEY', 'EIA_API_KEY',
   'CLOUDFLARE_API_TOKEN', 'ACLED_ACCESS_TOKEN', 'URLHAUS_AUTH_KEY',
   'OTX_API_KEY', 'ABUSEIPDB_API_KEY', 'WINGBITS_API_KEY', 'WS_RELAY_URL',
   'VITE_OPENSKY_RELAY_URL', 'OPENSKY_CLIENT_ID', 'OPENSKY_CLIENT_SECRET',

src-tauri/src/main.rs

@@ -27,9 +27,12 @@ const MENU_HELP_GITHUB_ID: &str = "help.github";
 #[cfg(feature = "devtools")]
 const MENU_HELP_DEVTOOLS_ID: &str = "help.devtools";
 const TRUSTED_WINDOWS: [&str; 3] = ["main", "settings", "live-channels"];
-const SUPPORTED_SECRET_KEYS: [&str; 25] = [
+const SUPPORTED_SECRET_KEYS: [&str; 28] = [
     "GROQ_API_KEY",
     "OPENROUTER_API_KEY",
+    "TAVILY_API_KEYS",
+    "BRAVE_API_KEYS",
+    "SERPAPI_API_KEYS",
     "FRED_API_KEY",
     "EIA_API_KEY",
     "CLOUDFLARE_API_TOKEN",