fix: resolve input locking issue and improve field reliability

frontend/components/TenderSearch.tsx

@@ -43,7 +43,9 @@ export default function TenderSearch({ tenders, onSearch, onAnalyze, forceShowFo
   }, [forceShowFollowed]);
 
   useEffect(() => {
-    if (initialKeyword) setKeyword(initialKeyword);
+    if (initialKeyword && initialKeyword !== keyword) {
+      setKeyword(initialKeyword);
+    }
   }, [initialKeyword]);
 
   useEffect(() => {
@@ -159,12 +161,14 @@ export default function TenderSearch({ tenders, onSearch, onAnalyze, forceShowFo
             </div>
             
             {!forceShowFollowed && (
-              <form onSubmit={handleSearch} className="grid grid-cols-1 md:grid-cols-4 gap-6 animate-in slide-in-from-top-4 duration-500">
+              <form onSubmit={handleSearch} className="relative z-10 grid grid-cols-1 md:grid-cols-4 gap-6 animate-in slide-in-from-top-4 duration-500">
 
                 <div className="space-y-2">
                   <label className="text-[10px] uppercase tracking-wider text-slate-500 font-bold px-1">Keyword</label>
                   <input
                     type="text"
+                    name="keyword"
+                    autoComplete="off"
                     placeholder="e.g. Software, Cloud..."
                     className="w-full bg-white/5 border border-white/10 rounded-xl px-4 py-3 text-white placeholder:text-slate-600 focus:outline-none focus:ring-2 focus:ring-purple-500/40 transition-all"
                     value={keyword}
@@ -175,6 +179,8 @@ export default function TenderSearch({ tenders, onSearch, onAnalyze, forceShowFo
                   <label className="text-[10px] uppercase tracking-wider text-slate-500 font-bold px-1">Buyer Code</label>
                   <input
                     type="text"
+                    name="buyerCode"
+                    autoComplete="off"
                     placeholder="e.g. 6945"
                     className="w-full bg-white/5 border border-white/10 rounded-xl px-4 py-3 text-white placeholder:text-slate-600 focus:outline-none focus:ring-2 focus:ring-purple-500/40 transition-all"
                     value={buyerCode}