fix(chat): follow active response at bottom

frontend/tests/consultation-entrypoint.test.ts

@@ -270,6 +270,12 @@ test("starter cards use transient pressed feedback instead of sticky hover shadi
   assert.equal(starterHoverSurfaceRules.length, 0);
   assert.match(styles, /\.product-entrypoint-card:has\(\.product-entrypoint-hitarea:not\(:disabled\):active\)\s*\{[^}]*background\s*:/);
   assert.match(styles, /\.starter-theme-card:not\(:disabled\):active\s*\{[^}]*background\s*:/);
+
+  const disabledProductRules = [...styles.matchAll(
+    /\.product-entrypoint-card:has\(\.product-entrypoint-hitarea:disabled\)\s*\{([^}]*)\}/g,
+  )];
+  assert.equal(disabledProductRules.length, 2);
+  for (const rule of disabledProductRules) assert.match(rule[1], /opacity:\s*1\s*;/);
 });
 
 test("starter homepage stays editorial and hides technical chart parameters", () => {

frontend/tests/rectification-agentic-entry.test.ts

@@ -156,6 +156,15 @@ test("Agentic rectification uses one case-level entitlement and the session-pinn
   assert.doesNotMatch(route, /loadLanguageModelCatalog|resolveLanguageModelFromCatalog|\bresolveLanguageModel\(|\bdefaultLanguageModel\(/);
 });
 
+test("Agentic rectification scrolls the conversation container as streamed messages grow", () => {
+  assert.match(chat, /const conversation = useRef<HTMLElement>\(null\)/);
+  assert.match(chat, /<section ref=\{conversation\} className="conversation"/);
+  assert.match(chat, /const container = conversation\.current/);
+  assert.match(chat, /top: container\.scrollHeight/);
+  assert.match(chat, /\}, \[busy, error, messages, savedTime\]\);/);
+  assert.doesNotMatch(chat, /conversationEnd|scrollIntoView/);
+});
+
 test("candidate state streams before done and renders reusable multi-column choices", () => {
   assert.match(route, /send\(\{ type: "candidates", result: candidateResult \}\)[\s\S]*send\(\{ type: "done", emitted: true \}\)/);
   assert.match(chat, /fetch\(`\/api\/rectification\/agent\?sessionId=/);

frontend/tests/starter-questions.test.ts

@@ -165,7 +165,10 @@ test("keeps the empty starter home at the top instead of auto-scrolling", () =>
   );
 
   assert.match(autoScrollEffect, /if \(starterHomeVisible\) return/);
-  assert.match(autoScrollEffect, /conversationEnd\.current\?\.scrollIntoView/);
+  assert.match(autoScrollEffect, /const container = conversation\.current/);
+  assert.match(autoScrollEffect, /container\.scrollTo\(\{ top: container\.scrollHeight/);
+  assert.match(pageSource, /ref=\{conversation\} className=\{`conversation/);
+  assert.doesNotMatch(pageSource, /conversationEnd|scrollIntoView/);
 });
 
 test("does not submit the composer while an IME composition is active", () => {