chore: navigation bar implemented

README.md

@@ -94,8 +94,11 @@ python -m quant_research_starter.cli compute-factors -d data_sample/sample_price
 # run a backtest
 python -m quant_research_starter.cli backtest -d data_sample/sample_prices.csv -s output/factors.csv -o output/backtest_results.json
 
-# optional: start the Streamlit dashboard
+# DISCLAIMER: OLD VERSION
+# optional: start the Streamlit dashboard, if on main stream
 streamlit run src/quant_research_starter/dashboard/streamlit_app.py
+# NEW VERSION: if streamlit is in legacy folder
+streamlit run legacy/streamlit/streamlit_app.py
 ```
 
 ---

src/quant_research_starter/frontend/cauweb/package.json

@@ -0,0 +1,32 @@
+{
+  "name": "@qrs/cauweb",
+  "version": "1.0.0",
+  "type": "module",
+  "scripts": {
+    "dev": "vite",
+    "build": "vite build",
+    "preview": "vite preview",
+    "lint": "eslint src --ext .ts,.tsx"
+  },
+  "dependencies": {
+    "@tailwindcss/vite": "^4.1.17",
+    "chart.js": "^4.5.1",
+    "lucide-react": "^0.263.1",
+    "react": "^18.2.0",
+    "react-chartjs-2": "^5.3.1",
+    "react-dom": "^18.2.0",
+    "react-router-dom": "^6.8.0"
+  },
+  "devDependencies": {
+    "@tailwindcss/cli": "^4.1.17",
+    "@tailwindcss/postcss": "^4.1.17",
+    "@types/react": "^18.3.26",
+    "@types/react-dom": "^18.3.7",
+    "@vitejs/plugin-react": "^4.1.0",
+    "autoprefixer": "^10.4.21",
+    "postcss": "^8.5.6",
+    "tailwindcss": "^4.1.17",
+    "typescript": "^5.9.3",
+    "vite": "^5.0.0"
+  }
+}

src/quant_research_starter/frontend/cauweb/src/components/Header.tsx

@@ -0,0 +1,208 @@
+import { useState, useRef, useEffect } from 'react';
+import { Bell, Search, User, Settings, LogOut, ChevronDown, Menu, X } from 'lucide-react';
+
+export const Header = () => {
+  const [isProfileOpen, setIsProfileOpen] = useState(false);
+  const [isMobileMenuOpen, setIsMobileMenuOpen] = useState(false);
+  const [showSuggestions, setShowSuggestions] = useState(false);
+  const [searchQuery, setSearchQuery] = useState('');
+
+  const profileRef = useRef<HTMLDivElement>(null);
+  const searchRef = useRef<HTMLDivElement>(null);
+
+  // Close dropdowns when clicking outside
+  useEffect(() => {
+    const handleClickOutside = (event: MouseEvent) => {
+      if (profileRef.current && !profileRef.current.contains(event.target as Node)) {
+        setIsProfileOpen(false);
+      }
+      if (searchRef.current && !searchRef.current.contains(event.target as Node)) {
+        setShowSuggestions(false);
+      }
+    };
+
+    document.addEventListener('mousedown', handleClickOutside);
+    return () => document.removeEventListener('mousedown', handleClickOutside);
+  }, []);
+
+  // Mock search suggestions
+  const searchSuggestions = [
+    "Mean Reversion Strategy",
+    "BTC/USD Correlation",
+    "Portfolio Optimization",
+    "Risk Metrics Analysis",
+    "Volatility Forecasting"
+  ];
+
+  const filteredSuggestions = searchSuggestions.filter(suggestion =>
+    suggestion.toLowerCase().includes(searchQuery.toLowerCase())
+  );
+
+  // Handle mobile search
+  const handleMobileSearch = () => {
+    // Implement mobile search modal or expandable search
+    console.log("Mobile search activated");
+  };
+
+  // Handle profile actions
+  const handleProfileAction = (action: string) => {
+    setIsProfileOpen(false);
+    console.log(`${action} clicked`);
+    // Add your navigation or action logic here
+  };
+
+  return (
+    <header className="bg-white dark:bg-gray-900 shadow-sm border-b border-gray-200 dark:border-gray-700 sticky top-0 z-50">
+      <div className="flex items-center justify-between px-4 lg:px-6 py-4">
+        {/* Logo and Mobile Menu Button */}
+        <div className="flex items-center space-x-4">
+          {/* Mobile Menu Button */}
+          <button
+            onClick={() => setIsMobileMenuOpen(!isMobileMenuOpen)}
+            className="lg:hidden p-2 text-gray-600 dark:text-gray-300 hover:bg-gray-100 dark:hover:bg-gray-800 rounded-lg transition-colors"
+            aria-label="Toggle menu"
+            aria-expanded={isMobileMenuOpen}
+          >
+            {isMobileMenuOpen ? <X className="w-5 h-5" /> : <Menu className="w-5 h-5" />}
+          </button>
+
+          {/* Logo */}
+          <h1 className="text-xl font-bold text-gray-900 dark:text-white">
+            QuantResearch
+          </h1>
+        </div>
+
+        {/* Search Bar - Hidden on mobile, visible on desktop */}
+        <div ref={searchRef} className="hidden lg:block flex-1 max-w-2xl mx-8">
+          <div className="relative">
+            <Search className="absolute left-3 top-1/2 transform -translate-y-1/2 text-gray-400 w-4 h-4" />
+            <input
+              type="text"
+              value={searchQuery}
+              onChange={(e) => {
+                setSearchQuery(e.target.value);
+                setShowSuggestions(true);
+              }}
+              onFocus={() => setShowSuggestions(true)}
+              placeholder="Search strategies, assets, or metrics..."
+              className="w-full pl-10 pr-4 py-2.5 border border-gray-300 dark:border-gray-600 rounded-lg focus:ring-2 focus:ring-blue-500 focus:border-transparent transition-all duration-200 bg-gray-50 dark:bg-gray-800 hover:bg-white dark:hover:bg-gray-700 text-gray-900 dark:text-white placeholder-gray-500 dark:placeholder-gray-400"
+            />
+
+            {/* Search Suggestions Dropdown */}
+            {showSuggestions && searchQuery && (
+              <div className="absolute top-full left-0 right-0 mt-1 bg-white dark:bg-gray-800 border border-gray-200 dark:border-gray-700 rounded-lg shadow-lg z-50 max-h-60 overflow-y-auto">
+                <div className="py-2">
+                  {filteredSuggestions.length > 0 ? (
+                    filteredSuggestions.map((suggestion, index) => (
+                      <button
+                        key={`suggestion-${index}`}
+                        onClick={() => {
+                          setSearchQuery(suggestion);
+                          setShowSuggestions(false);
+                        }}
+                        className="w-full px-4 py-2 text-left text-sm text-gray-700 dark:text-gray-300 hover:bg-gray-50 dark:hover:bg-gray-700 transition-colors"
+                      >
+                        {suggestion}
+                      </button>
+                    ))
+                  ) : (
+                    <div className="px-4 py-2 text-sm text-gray-500 dark:text-gray-400">
+                      No results found
+                    </div>
+                  )}
+                </div>
+              </div>
+            )}
+          </div>
+        </div>
+
+        {/* Mobile Search Button */}
+        <button
+          onClick={handleMobileSearch}
+          className="lg:hidden p-2 text-gray-600 dark:text-gray-300 hover:bg-gray-100 dark:hover:bg-gray-800 rounded-lg transition-colors"
+          aria-label="Search"
+        >
+          <Search className="w-5 h-5" />
+        </button>
+
+        {/* Right Section - Notifications & Profile */}
+        <div className="flex items-center space-x-4">
+          {/* Notifications - Hidden on mobile */}
+          <button
+            className="hidden sm:flex relative p-2 text-gray-600 dark:text-gray-300 hover:text-gray-900 dark:hover:text-white hover:bg-gray-100 dark:hover:bg-gray-800 rounded-lg transition-colors duration-200 focus:outline-none focus:ring-2 focus:ring-blue-500 focus:ring-offset-2 dark:focus:ring-offset-gray-900"
+            aria-label="Notifications"
+          >
+            <Bell className="w-5 h-5" />
+            <span className="absolute -top-1 -right-1 w-4 h-4 bg-red-500 text-white text-xs rounded-full flex items-center justify-center">
+              3
+            </span>
+          </button>
+
+          {/* Profile Dropdown */}
+          <div ref={profileRef} className="relative">
+            <button
+              onClick={() => setIsProfileOpen(!isProfileOpen)}
+              className="flex items-center space-x-3 p-2 rounded-lg hover:bg-gray-100 dark:hover:bg-gray-800 transition-colors duration-200 focus:outline-none focus:ring-2 focus:ring-blue-500 focus:ring-offset-2 dark:focus:ring-offset-gray-900"
+              aria-label="User menu"
+              aria-expanded={isProfileOpen}
+            >
+              <div className="w-8 h-8 bg-gradient-to-br from-blue-500 to-purple-600 rounded-full flex items-center justify-center shadow-sm">
+                <User className="w-4 h-4 text-white" />
+              </div>
+              <div className="hidden sm:flex items-center space-x-1">
+                <span className="text-sm font-medium text-gray-700 dark:text-gray-300">
+                  Sarah Wilson
+                </span>
+                <ChevronDown
+                  className={`w-4 h-4 text-gray-500 dark:text-gray-400 transition-transform duration-200 ${
+                    isProfileOpen ? 'rotate-180' : ''
+                  }`}
+                />
+              </div>
+            </button>
+
+            {/* Dropdown Menu */}
+            {isProfileOpen && (
+              <div className="absolute right-0 top-full mt-2 w-48 bg-white dark:bg-gray-800 rounded-lg shadow-lg border border-gray-200 dark:border-gray-700 py-1 z-50">
+                <div className="py-1">
+                  {/* Mobile-only user name */}
+                  <div className="px-4 py-2 border-b border-gray-200 dark:border-gray-700 sm:hidden">
+                    <span className="text-sm font-medium text-gray-700 dark:text-gray-300">
+                      Sarah Wilson
+                    </span>
+                  </div>
+
+                  <button
+                    onClick={() => handleProfileAction('Profile')}
+                    className="flex items-center w-full px-4 py-2 text-sm text-gray-700 dark:text-gray-300 hover:bg-gray-50 dark:hover:bg-gray-700 transition-colors duration-150"
+                  >
+                    <User className="w-4 h-4 mr-3" />
+                    Profile
+                  </button>
+
+                  <button
+                    onClick={() => handleProfileAction('Settings')}
+                    className="flex items-center w-full px-4 py-2 text-sm text-gray-700 dark:text-gray-300 hover:bg-gray-50 dark:hover:bg-gray-700 transition-colors duration-150"
+                  >
+                    <Settings className="w-4 h-4 mr-3" />
+                    Settings
+                  </button>
+
+                  <div className="border-t border-gray-200 dark:border-gray-700 my-1" />
+
+                  <button
+                    onClick={() => handleProfileAction('Sign Out')}
+                    className="flex items-center w-full px-4 py-2 text-sm text-red-600 dark:text-red-400 hover:bg-red-50 dark:hover:bg-red-900/20 transition-colors duration-150"
+                  >
+                    <LogOut className="w-4 h-4 mr-3" />
+                    Sign Out
+                  </button>
+                </div>
+              </div>
+            )}
+          </div>
+        </div>
+      </div>
+    </header>
+  );
+};

src/quant_research_starter/frontend/cauweb/src/components/Navigation.tsx

@@ -0,0 +1,72 @@
+import React from 'react';
+import { NavLink } from 'react-router-dom';
+import { 
+  LayoutDashboard, 
+  PlayCircle, 
+  Beaker, 
+  PieChart, 
+  Settings,
+  TrendingUp
+} from 'lucide-react';
+
+export const Navigation: React.FC = () => {
+  const navItems = [
+    { path: '/', icon: LayoutDashboard, label: 'Dashboard' },
+    { path: '/backtest', icon: PlayCircle, label: 'Backtest Studio' },
+    { path: '/research', icon: Beaker, label: 'Research Lab' },
+    { path: '/portfolio', icon: PieChart, label: 'Portfolio Analytics' },
+    { path: '/settings', icon: Settings, label: 'Settings' }
+  ];
+
+  return (
+    <nav className="navigation">
+      {/* Logo */}
+      <div className="nav-header">
+        <div className="nav-logo">
+          <div className="logo-icon">
+            <TrendingUp size={20} />
+          </div>
+          <div className="logo-text">
+            <h1>CAUQuant</h1>
+            <p>Research Platform</p>
+          </div>
+        </div>
+      </div>
+
+      {/* Navigation Items */}
+      <div className="nav-items">
+        {navItems.map((item) => {
+          const Icon = item.icon;
+          return (
+            <NavLink
+              key={item.path}
+              to={item.path}
+              className={({ isActive }) =>
+                `nav-item ${isActive ? 'active' : ''}`
+              }
+            >
+              <Icon className="icon" size={20} />
+              <span>{item.label}</span>
+            </NavLink>
+          );
+        })}
+      </div>
+
+      {/* Quick Stats */}
+      <div className="nav-stats">
+        <div className="stat-item">
+          <span>Strategies</span>
+          <span>12</span>
+        </div>
+        <div className="stat-item">
+          <span>Assets</span>
+          <span>248</span>
+        </div>
+        <div className="stat-item">
+          <span>Backtests</span>
+          <span>1.2K</span>
+        </div>
+      </div>
+    </nav>
+  );
+};