From c738f785c3c5b245d294d8417ce0a833d65ca610 Mon Sep 17 00:00:00 2001
From: agent-company <agent@leeworks.dev>
Date: Thu, 26 Mar 2026 10:22:14 +0000
Subject: [PATCH] feat: add side-by-side patent portfolio comparison view

Add /compare route with two-panel layout for comparing company patent
portfolios. Each panel shows patent count, analysis timestamp, and
full LLM narrative. The page is responsive (stacks vertically on
mobile) and supports URL params (?a=nvidia&b=intel) for shareability.

Closes leeworks-agents/SPARC#21

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
---
 frontend/src/App.tsx               |   2 +
 frontend/src/components/Layout.tsx |   3 +-
 frontend/src/pages/Compare.tsx     | 161 +++++++++++++++++++++++++++++
 3 files changed, 165 insertions(+), 1 deletion(-)
 create mode 100644 frontend/src/pages/Compare.tsx

diff --git a/frontend/src/App.tsx b/frontend/src/App.tsx
index c3426cd..e630389 100644
--- a/frontend/src/App.tsx
+++ b/frontend/src/App.tsx
@@ -10,6 +10,7 @@ import { Batch } from './pages/Batch';
 import { AnalyticsPage } from './pages/Analytics';
 import { About } from './pages/About';
 import { AdminUsers } from './pages/AdminUsers';
+import { Compare } from './pages/Compare';
 
 const queryClient = new QueryClient({
   defaultOptions: {
@@ -41,6 +42,7 @@ function App() {
               <Route path="/analysis" element={<Analysis />} />
               <Route path="/batch" element={<Batch />} />
               <Route path="/analytics" element={<AnalyticsPage />} />
+              <Route path="/compare" element={<Compare />} />
               <Route path="/about" element={<About />} />
 
               {/* Admin routes */}
diff --git a/frontend/src/components/Layout.tsx b/frontend/src/components/Layout.tsx
index 501dc1f..0f5afbf 100644
--- a/frontend/src/components/Layout.tsx
+++ b/frontend/src/components/Layout.tsx
@@ -1,6 +1,6 @@
 import { Outlet, NavLink, useNavigate } from 'react-router-dom';
 import { useAuth } from '../context/AuthContext';
-import { Search, Layers, BarChart3, Info, Users, LogOut } from 'lucide-react';
+import { Search, Layers, BarChart3, Info, Users, LogOut, GitCompareArrows } from 'lucide-react';
 
 export function Layout() {
   const { user, isAdmin, logout } = useAuth();
@@ -15,6 +15,7 @@ export function Layout() {
     { to: '/analysis', icon: Search, label: 'Analysis' },
     { to: '/batch', icon: Layers, label: 'Batch' },
     { to: '/analytics', icon: BarChart3, label: 'Analytics' },
+    { to: '/compare', icon: GitCompareArrows, label: 'Compare' },
     { to: '/about', icon: Info, label: 'About' },
   ];
 
diff --git a/frontend/src/pages/Compare.tsx b/frontend/src/pages/Compare.tsx
new file mode 100644
index 0000000..eef3e53
--- /dev/null
+++ b/frontend/src/pages/Compare.tsx
@@ -0,0 +1,161 @@
+import { useState } from 'react';
+import { useSearchParams } from 'react-router-dom';
+import { useQuery } from '@tanstack/react-query';
+import { analysisApi } from '../api/client';
+import { GitCompareArrows, AlertCircle, FileText, Clock } from 'lucide-react';
+import type { CompanyAnalysis } from '../types';
+
+function CompanyPanel({ data, isLoading, isError }: { data?: CompanyAnalysis; isLoading: boolean; isError: boolean }) {
+  if (isLoading) {
+    return (
+      <div className="bg-bg-card/60 border border-primary/15 rounded-2xl p-6 animate-pulse">
+        <div className="h-6 w-32 bg-primary/20 rounded mb-4" />
+        <div className="space-y-3">
+          <div className="h-4 bg-primary/10 rounded w-full" />
+          <div className="h-4 bg-primary/10 rounded w-3/4" />
+          <div className="h-4 bg-primary/10 rounded w-5/6" />
+        </div>
+      </div>
+    );
+  }
+
+  if (isError) {
+    return (
+      <div className="bg-error/10 border border-error/20 rounded-2xl p-6">
+        <div className="flex items-center gap-2 text-error">
+          <AlertCircle size={18} />
+          <span>Failed to load analysis. Check the company name and try again.</span>
+        </div>
+      </div>
+    );
+  }
+
+  if (!data) return null;
+
+  return (
+    <div className="bg-bg-card/60 border border-primary/15 rounded-2xl p-6 space-y-4">
+      <h3 className="text-lg font-bold text-text-primary border-b-2 border-primary/30 pb-2">
+        {data.company_name.toUpperCase()}
+      </h3>
+
+      <div className="grid grid-cols-2 gap-3">
+        <div className="bg-primary/10 rounded-lg p-3 text-center">
+          <FileText className="mx-auto mb-1 text-primary" size={18} />
+          <div className="text-xl font-bold text-text-primary">{data.patent_count}</div>
+          <div className="text-xs text-text-secondary uppercase">Patents</div>
+        </div>
+        <div className="bg-primary/10 rounded-lg p-3 text-center">
+          <Clock className="mx-auto mb-1 text-primary" size={18} />
+          <div className="text-sm font-medium text-text-primary">
+            {new Date(data.timestamp).toLocaleDateString()}
+          </div>
+          <div className="text-xs text-text-secondary uppercase">Analyzed</div>
+        </div>
+      </div>
+
+      {data.success && data.analysis ? (
+        <div className="text-text-primary whitespace-pre-wrap leading-relaxed text-sm">
+          {data.analysis}
+        </div>
+      ) : (
+        <div className="text-error text-sm">{data.error || 'Analysis not available'}</div>
+      )}
+    </div>
+  );
+}
+
+export function Compare() {
+  const [searchParams, setSearchParams] = useSearchParams();
+  const [companyA, setCompanyA] = useState(searchParams.get('a') || '');
+  const [companyB, setCompanyB] = useState(searchParams.get('b') || '');
+
+  const queryA = searchParams.get('a') || '';
+  const queryB = searchParams.get('b') || '';
+
+  const resultA = useQuery({
+    queryKey: ['analyze', queryA],
+    queryFn: () => analysisApi.analyzeCompany(queryA),
+    enabled: !!queryA,
+  });
+
+  const resultB = useQuery({
+    queryKey: ['analyze', queryB],
+    queryFn: () => analysisApi.analyzeCompany(queryB),
+    enabled: !!queryB,
+  });
+
+  const handleCompare = (e: React.FormEvent) => {
+    e.preventDefault();
+    const a = companyA.trim();
+    const b = companyB.trim();
+    if (a && b) {
+      setSearchParams({ a, b });
+    }
+  };
+
+  return (
+    <div className="space-y-6">
+      {/* Header */}
+      <div>
+        <h2 className="text-xl font-semibold text-text-primary border-b-2 border-primary/30 pb-2 mb-2">
+          Portfolio Comparison
+        </h2>
+        <p className="text-text-secondary">
+          Compare patent portfolios of two companies side by side.
+        </p>
+      </div>
+
+      {/* Input Form */}
+      <form onSubmit={handleCompare} className="flex flex-col sm:flex-row gap-3 items-end">
+        <div className="flex-1">
+          <label className="block text-sm font-medium text-text-secondary mb-1">Company A</label>
+          <input
+            type="text"
+            value={companyA}
+            onChange={(e) => setCompanyA(e.target.value)}
+            placeholder="e.g. nvidia"
+            className="w-full bg-bg-card/80 border border-primary/30 rounded-xl px-4 py-2.5 text-text-primary placeholder-text-secondary/50 focus:outline-none focus:border-primary focus:ring-2 focus:ring-primary/20 transition-all"
+          />
+        </div>
+        <div className="flex-1">
+          <label className="block text-sm font-medium text-text-secondary mb-1">Company B</label>
+          <input
+            type="text"
+            value={companyB}
+            onChange={(e) => setCompanyB(e.target.value)}
+            placeholder="e.g. intel"
+            className="w-full bg-bg-card/80 border border-primary/30 rounded-xl px-4 py-2.5 text-text-primary placeholder-text-secondary/50 focus:outline-none focus:border-primary focus:ring-2 focus:ring-primary/20 transition-all"
+          />
+        </div>
+        <button
+          type="submit"
+          disabled={!companyA.trim() || !companyB.trim() || resultA.isLoading || resultB.isLoading}
+          className="bg-gradient-to-r from-primary to-primary-dark text-white font-semibold py-2.5 px-6 rounded-xl hover:shadow-lg hover:shadow-primary/30 transition-all disabled:opacity-50 disabled:cursor-not-allowed flex items-center gap-2"
+        >
+          <GitCompareArrows size={18} />
+          Compare
+        </button>
+      </form>
+
+      {/* Comparison Panels */}
+      {(queryA || queryB) && (
+        <div className="grid grid-cols-1 lg:grid-cols-2 gap-6">
+          {queryA && (
+            <CompanyPanel
+              data={resultA.data}
+              isLoading={resultA.isLoading}
+              isError={resultA.isError}
+            />
+          )}
+          {queryB && (
+            <CompanyPanel
+              data={resultB.data}
+              isLoading={resultB.isLoading}
+              isError={resultB.isError}
+            />
+          )}
+        </div>
+      )}
+    </div>
+  );
+}