diff --git a/frontend/src/App.jsx b/frontend/src/App.jsx
deleted file mode 100644
index 5c31913..0000000
--- a/frontend/src/App.jsx
+++ /dev/null
@@ -1,340 +0,0 @@
-import { useEffect, useMemo, useState } from "react";
-import { callSkill, fileToBrowserDocument, loadAgentConfig, loadSession, signInUrl } from "./a2a.js";
-
-const DEFAULT_QUOTES = [
-  { vendor: "Acme Bearings", quantity: 500, unit_price: 10.75, delivery_days: 12, warranty_months: 12 },
-  { vendor: "Beta Industrial", quantity: 500, unit_price: 9.1, delivery_days: 8, warranty_months: 18 },
-];
-const DEFAULT_WEIGHTS = { price: 50, delivery: 30, warranty: 20 };
-
-function blankQuote() {
-  return { vendor: "", quantity: 1, unit_price: 0, delivery_days: 0, warranty_months: 0 };
-}
-
-function normalizeQuote(quote) {
-  return {
-    vendor: String(quote.vendor || "").trim(),
-    quantity: Number(quote.quantity),
-    unit_price: Number(quote.unit_price),
-    delivery_days: Number(quote.delivery_days),
-    warranty_months: Number(quote.warranty_months),
-  };
-}
-
-function parsePastedQuotes(text) {
-  const trimmed = text.trim();
-  if (!trimmed) return [];
-  try {
-    const parsed = JSON.parse(trimmed);
-    const rows = Array.isArray(parsed) ? parsed : parsed.quotes;
-    if (Array.isArray(rows)) return rows.map(normalizeQuote);
-  } catch {
-    // Fall through to CSV-ish parsing.
-  }
-  const lines = trimmed.split(/\r?\n/).filter(Boolean);
-  const hasHeader = /vendor|supplier/i.test(lines[0] || "");
-  const rows = hasHeader ? lines.slice(1) : lines;
-  return rows.map((line) => {
-    const parts = line.split(/[,;|\t]/).map((part) => part.trim());
-    return normalizeQuote({
-      vendor: parts[0],
-      quantity: parts[1],
-      unit_price: parts[2],
-      delivery_days: parts[3],
-      warranty_months: parts[4],
-    });
-  });
-}
-
-function validateQuotes(quotes, weights) {
-  const complete = quotes.map(normalizeQuote).filter((quote) => quote.vendor);
-  if (complete.length < 2) return "Add at least two vendor quotes before comparing.";
-  for (const quote of complete) {
-    if (!Number.isFinite(quote.quantity) || quote.quantity <= 0) return `${quote.vendor}: quantity must be greater than 0.`;
-    if (!Number.isFinite(quote.unit_price) || quote.unit_price < 0) return `${quote.vendor}: unit price must be 0 or greater.`;
-    if (!Number.isFinite(quote.delivery_days) || quote.delivery_days < 0) return `${quote.vendor}: delivery days must be 0 or greater.`;
-    if (!Number.isFinite(quote.warranty_months) || quote.warranty_months < 0) return `${quote.vendor}: warranty must be 0 or greater.`;
-  }
-  const totalWeight = Number(weights.price) + Number(weights.delivery) + Number(weights.warranty);
-  if (!Number.isFinite(totalWeight) || totalWeight <= 0) return "Set at least one positive weight.";
-  return null;
-}
-
-export function App() {
-  const [config, setConfig] = useState(null);
-  const [session, setSession] = useState(null);
-  const [loadError, setLoadError] = useState(null);
-  const [comparisonId, setComparisonId] = useState("studio-quote-v1");
-  const [quotes, setQuotes] = useState(DEFAULT_QUOTES);
-  const [weights, setWeights] = useState(DEFAULT_WEIGHTS);
-  const [pasteText, setPasteText] = useState("");
-  const [result, setResult] = useState(null);
-  const [history, setHistory] = useState([]);
-  const [status, setStatus] = useState("");
-  const [error, setError] = useState("");
-  const [running, setRunning] = useState(false);
-
-  useEffect(() => {
-    loadAgentConfig()
-      .then(async (data) => {
-        setConfig(data);
-        try {
-          setSession(await loadSession(data));
-        } catch {
-          setSession({ authenticated: false });
-        }
-      })
-      .catch((err) => setLoadError(err.message || String(err)));
-  }, []);
-
-  useEffect(() => {
-    try {
-      const saved = JSON.parse(window.localStorage.getItem("quotejudge.history") || "[]");
-      if (Array.isArray(saved)) setHistory(saved.slice(0, 8));
-    } catch {
-      setHistory([]);
-    }
-  }, []);
-
-  const needsSignIn = Boolean(config?.auth?.invokeRequiresSession && session && !session.authenticated);
-  const authHref = useMemo(() => (config ? signInUrl(config) : null), [config]);
-  const validation = validateQuotes(quotes, weights);
-  const totalWeight = Number(weights.price) + Number(weights.delivery) + Number(weights.warranty);
-
-  function updateQuote(index, field, value) {
-    setQuotes((current) => current.map((quote, i) => (i === index ? { ...quote, [field]: value } : quote)));
-  }
-
-  function remember(id) {
-    const next = [id, ...history.filter((item) => item !== id)].slice(0, 8);
-    setHistory(next);
-    window.localStorage.setItem("quotejudge.history", JSON.stringify(next));
-  }
-
-  function applyPastedQuotes() {
-    setError("");
-    try {
-      const parsed = parsePastedQuotes(pasteText);
-      if (parsed.length < 2) {
-        setError("Paste JSON, CSV, or pipe-separated text with at least two quotes.");
-        return;
-      }
-      setQuotes(parsed);
-      setStatus(`Loaded ${parsed.length} pasted quotes.`);
-    } catch (err) {
-      setError(err.message || "Could not parse pasted quotes.");
-    }
-  }
-
-  async function compare(event) {
-    event.preventDefault();
-    if (!config) return;
-    setError("");
-    setStatus("");
-    const message = validateQuotes(quotes, weights);
-    if (message) {
-      setError(message);
-      return;
-    }
-    setRunning(true);
-    try {
-      const data = await callSkill(config, "compare_quotes", {
-        comparison_id: comparisonId,
-        quotes: quotes.map(normalizeQuote).filter((quote) => quote.vendor),
-        weights: {
-          price: Number(weights.price),
-          delivery: Number(weights.delivery),
-          warranty: Number(weights.warranty),
-        },
-      });
-      setResult(data);
-      if (data.ok) {
-        remember(data.comparison_id);
-        setStatus("Comparison saved. You can refresh and reopen it by ID.");
-      } else {
-        setError(data.message || data.code || "Comparison failed.");
-      }
-    } catch (err) {
-      if (err.status === 401 && authHref) setError("Session expired. Sign in again to run QuoteJudge.");
-      else setError(err.message || String(err));
-    } finally {
-      setRunning(false);
-    }
-  }
-
-  async function reopen(id = comparisonId) {
-    if (!config || !id) return;
-    setRunning(true);
-    setError("");
-    setStatus("");
-    try {
-      const data = await callSkill(config, "get_comparison", { comparison_id: id });
-      setResult(data);
-      setComparisonId(id);
-      if (data.ok) {
-        remember(id);
-        setStatus("Saved comparison reopened from managed Postgres.");
-      } else {
-        setError(data.message || "No saved comparison found for this ID.");
-      }
-    } catch (err) {
-      if (err.status === 401 && authHref) setError("Session expired. Sign in again to reopen comparisons.");
-      else setError(err.message || String(err));
-    } finally {
-      setRunning(false);
-    }
-  }
-
-  async function handleFiles(event) {
-    if (!config) return;
-    const files = Array.from(event.target.files || []);
-    if (!files.length) return;
-    setRunning(true);
-    setError("");
-    setStatus("");
-    try {
-      const documents = await Promise.all(files.map((file) => fileToBrowserDocument(file)));
-      const data = await callSkill(config, "compare_uploaded_quotes_browser", {
-        comparison_id: comparisonId,
-        documents,
-        weights: {
-          price: Number(weights.price),
-          delivery: Number(weights.delivery),
-          warranty: Number(weights.warranty),
-        },
-      });
-      setResult(data);
-      if (data.ok) {
-        setQuotes(data.quotes.map(({ vendor, quantity, unit_price, delivery_days, warranty_months }) => ({ vendor, quantity, unit_price, delivery_days, warranty_months })));
-        remember(data.comparison_id);
-        setStatus("Uploaded quotes parsed, compared, and saved.");
-      } else {
-        setError(data.message || data.code || "Upload comparison failed.");
-      }
-    } catch (err) {
-      setError(err.message || String(err));
-    } finally {
-      event.target.value = "";
-      setRunning(false);
-    }
-  }
-
-  if (!config) {
-    return <main className="loading"><p>{loadError || "Loading QuoteJudge…"}</p></main>;
-  }
-
-  return (
-    <main className="app-shell">
-      <section className="hero card">
-        <div>
-          <p className="eyebrow">QuoteJudge Studio</p>
-          <h1>Pick the best vendor quote with weighted, auditable scoring.</h1>
-          <p className="lede">Upload or paste quotes, tune price/delivery/warranty importance, save the comparison, and reopen it after refresh. Results are calculated by typed A2A backend tools and stored per signed-in user.</p>
-        </div>
-        <div className="session-box">
-          <span className={session?.authenticated ? "dot ok" : "dot warn"} />
-          <div>
-            <strong>{session?.authenticated ? "Signed in" : "Sign-in required to run"}</strong>
-            <p>{session?.user?.email || session?.org?.slug || "Platform auth protects saved comparisons."}</p>
-          </div>
-          {needsSignIn && authHref ? <a className="button secondary" href={authHref}>Sign in</a> : null}
-        </div>
-      </section>
-
-      <form className="grid" onSubmit={compare}>
-        <section className="card editor">
-          <div className="section-head">
-            <div>
-              <p className="eyebrow">Inputs</p>
-              <h2>Vendor quotes</h2>
-            </div>
-            <button type="button" className="button ghost" onClick={() => setQuotes((rows) => [...rows, blankQuote()])}>Add quote</button>
-          </div>
-
-          <label className="field id-field">Comparison ID
-            <input value={comparisonId} onChange={(e) => setComparisonId(e.target.value)} placeholder="studio-quote-v1" />
-          </label>
-
-          <div className="quote-list">
-            {quotes.map((quote, index) => (
-              <article className="quote-row" key={index}>
-                <label>Vendor<input value={quote.vendor} onChange={(e) => updateQuote(index, "vendor", e.target.value)} /></label>
-                <label>Qty<input type="number" min="1" value={quote.quantity} onChange={(e) => updateQuote(index, "quantity", e.target.value)} /></label>
-                <label>Unit price<input type="number" min="0" step="0.01" value={quote.unit_price} onChange={(e) => updateQuote(index, "unit_price", e.target.value)} /></label>
-                <label>Delivery days<input type="number" min="0" value={quote.delivery_days} onChange={(e) => updateQuote(index, "delivery_days", e.target.value)} /></label>
-                <label>Warranty months<input type="number" min="0" value={quote.warranty_months} onChange={(e) => updateQuote(index, "warranty_months", e.target.value)} /></label>
-                <button type="button" aria-label={`Remove quote ${index + 1}`} onClick={() => setQuotes((rows) => rows.filter((_, i) => i !== index))}>×</button>
-              </article>
-            ))}
-          </div>
-
-          <div className="paste-upload">
-            <label>Paste JSON, CSV, or vendor|qty|price|delivery|warranty text
-              <textarea value={pasteText} onChange={(e) => setPasteText(e.target.value)} placeholder="vendor,quantity,unit_price,delivery_days,warranty_months…" />
-            </label>
-            <div className="actions">
-              <button type="button" className="button secondary" onClick={applyPastedQuotes}>Use pasted quotes</button>
-              <label className="button secondary upload">Upload CSV/JSON/TXT
-                <input type="file" multiple accept=".csv,.json,.txt,text/csv,text/plain,application/json" onChange={handleFiles} />
-              </label>
-            </div>
-          </div>
-        </section>
-
-        <aside className="card controls">
-          <p className="eyebrow">Scoring</p>
-          <h2>Weights</h2>
-          {Object.entries(weights).map(([key, value]) => (
-            <label className="slider" key={key}>{key}<strong>{value}</strong>
-              <input type="range" min="0" max="100" value={value} onChange={(e) => setWeights((w) => ({ ...w, [key]: Number(e.target.value) }))} />
-            </label>
-          ))}
-          <p className="hint">Total weight: {totalWeight}. Scores normalize each dimension from 0 to 1, then apply these weights.</p>
-          {validation ? <p className="validation">{validation}</p> : null}
-          {error ? <p className="error">{error}</p> : null}
-          {status ? <p className="status">{status}</p> : null}
-          <button className="button primary" disabled={running || needsSignIn || Boolean(validation)} type="submit">{running ? "Running…" : "Compare & save"}</button>
-          <button className="button secondary" disabled={running || needsSignIn} type="button" onClick={() => reopen()}>Reopen by ID</button>
-          {needsSignIn && authHref ? <a className="signin-note" href={authHref}>Sign in with A2A Cloud to call backend tools.</a> : null}
-          <div className="history">
-            <h3>Recent IDs</h3>
-            {history.length ? history.map((id) => <button key={id} type="button" onClick={() => reopen(id)}>{id}</button>) : <p>No saved comparisons opened in this browser yet.</p>}
-          </div>
-        </aside>
-      </form>
-
-      <section className="card result-card">
-        <div className="section-head">
-          <div>
-            <p className="eyebrow">Backend result</p>
-            <h2>{result?.ok ? `Recommended: ${result.recommendation.vendor}` : "No recommendation yet"}</h2>
-          </div>
-          {result?.ok ? <span className="score">Score {result.recommendation.score.toFixed(2)}</span> : null}
-        </div>
-        {result?.ok ? (
-          <>
-            <p className="rationale">{result.recommendation.rationale}</p>
-            <div className="table-wrap">
-              <table>
-                <thead><tr><th>Vendor</th><th>Total</th><th>Delivery</th><th>Warranty</th><th>Weighted score</th></tr></thead>
-                <tbody>
-                  {result.quotes.map((quote) => (
-                    <tr key={quote.vendor} className={quote.vendor === result.recommendation.vendor ? "winner" : ""}>
-                      <td>{quote.vendor}</td>
-                      <td>{quote.subtotal.toLocaleString(undefined, { style: "currency", currency: "BRL" })}</td>
-                      <td>{quote.delivery_days} days</td>
-                      <td>{quote.warranty_months} months</td>
-                      <td>{quote.scores.weighted_total.toFixed(2)}</td>
-                    </tr>
-                  ))}
-                </tbody>
-              </table>
-            </div>
-          </>
-        ) : (
-          <p className="empty">Run a comparison or reopen a saved ID. Fewer than two quotes are blocked before calling the backend and also rejected by the typed tool.</p>
-        )}
-      </section>
-    </main>
-  );
-}