fix: Market Intel UI - Add missing report fields & Fix back button

- StepReport.tsx: Added Search Strategy ICP, Digital Signals, and Target Pages to both the UI view and the Markdown export.

- StepReport.tsx: Fixed 'Back' button behavior to prevent state reset (uses new onBack prop).

- App.tsx: Passed handleBack to StepReport onBack prop.

- types.ts: Extended SearchStrategy interface with optional fields for the new signals.

general-market-intelligence/App.tsx

@@ -207,7 +207,8 @@ const App: React.FC = () => {
           <StepReport 
             results={analysisResults} 
             strategy={strategy}
-            onRestart={handleRestart} 
+            onRestart={handleRestart}
+            onBack={handleBack}
             language={language}
             onStartOutreach={(company) => {
                 setSelectedCompanyForOutreach(company);