fix: Implemented functional Back to Opportunities button in AgentAnalysis

frontend/app/page.tsx

@@ -264,6 +264,7 @@ export default function HomePage() {
                 companyProfile={companyProfile}
                 analysis={analysisResult}
                 onAnalyze={handleRunAnalysis}
+                onBackToSearch={() => setActiveTab("Tender Search")}
               />
             )}
             {activeTab === "Proposal Draft" && <ProposalDraft proposal={analysisResult?.proposal_draft ?? ""} />}

frontend/components/AgentAnalysis.tsx

@@ -9,6 +9,7 @@ type Props = {
   companyProfile: CompanyProfile;
   analysis: AnalysisResult | null;
   onAnalyze: (documentText?: string, models?: Record<string, string>) => Promise<void>;
+  onBackToSearch: () => void;
 };
 
 const agents = [
@@ -17,7 +18,7 @@ const agents = [
   { id: "risk", name: "Sra. Estrategia", role: "ROI & Risk", avatar: "🕵️‍♀️", color: "text-purple-400", desc: "Calculates commercial impact and win probability." },
 ];
 
-export default function AgentAnalysis({ tender, companyProfile, analysis, onAnalyze }: Props) {
+export default function AgentAnalysis({ tender, companyProfile, analysis, onAnalyze, onBackToSearch }: Props) {
   const [approved, setApproved] = useState(false);
   const [isRunning, setIsRunning] = useState(false);
   const [file, setFile] = useState<File | null>(null);
@@ -85,16 +86,30 @@ export default function AgentAnalysis({ tender, companyProfile, analysis, onAnal
           ))}
         </div>
         
-        <div className="flex items-center gap-3 text-slate-600 animate-bounce">
-          <span className="text-sm font-bold uppercase tracking-widest">Go to Tender Search</span>
-          <span className="text-xl">↓</span>
-        </div>
+        <button 
+          onClick={onBackToSearch}
+          className="flex items-center gap-3 text-purple-400 hover:text-purple-300 transition-all active:scale-95 group"
+        >
+          <span className="text-xl transition-transform group-hover:-translate-x-1">←</span>
+          <span className="text-sm font-bold uppercase tracking-widest underline decoration-purple-500/30 underline-offset-8">Back to Opportunities</span>
+        </button>
       </div>
     );
   }
 
   return (
     <div className="space-y-8 animate-in fade-in slide-in-from-bottom-4 duration-700">
+      {/* Navigation Header */}
+      <div className="flex justify-start">
+        <button 
+          onClick={onBackToSearch}
+          className="flex items-center gap-3 text-slate-500 hover:text-white transition-all group"
+        >
+          <span className="text-xl transition-transform group-hover:-translate-x-1">←</span>
+          <span className="text-[10px] font-bold uppercase tracking-widest">Back to Opportunities</span>
+        </button>
+      </div>
+
       {/* Tender Header Card */}
       <div className="glass-card relative overflow-hidden rounded-3xl p-8 border border-white/10">
         <div className="absolute -right-20 -top-20 h-64 w-64 rounded-full bg-purple-500/10 blur-[100px]" />