增加调试前端页面

internal/handler/chatpage/app.css

@@ -0,0 +1,143 @@
+:root {
+  color: #17251e;
+  background: #eef2ed;
+  font-family: Inter, "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
+  font-synthesis: none;
+}
+
+* { box-sizing: border-box; }
+
+body {
+  margin: 0;
+  min-width: 320px;
+  min-height: 100vh;
+  background:
+    radial-gradient(circle at 85% 5%, rgba(177, 204, 181, .55), transparent 28rem),
+    #eef2ed;
+}
+
+button, input, textarea { font: inherit; }
+
+button {
+  min-height: 44px;
+  border: 0;
+  border-radius: 12px;
+  padding: 0 18px;
+  color: #fff;
+  background: #175d3b;
+  cursor: pointer;
+}
+
+button:hover { background: #0e472c; }
+button:focus-visible, input:focus-visible, textarea:focus-visible { outline: 3px solid #e1a73d; outline-offset: 2px; }
+button:disabled { cursor: wait; opacity: .55; }
+
+.shell {
+  width: min(940px, calc(100% - 32px));
+  margin: 32px auto;
+}
+
+.masthead {
+  display: flex;
+  align-items: start;
+  justify-content: space-between;
+  gap: 24px;
+  padding: 28px 32px;
+  color: #f8fbf8;
+  border-radius: 22px 22px 0 0;
+  background: #123d2b;
+}
+
+.eyebrow { margin: 0 0 8px; color: #b9d4c2; font-size: .75rem; font-weight: 700; letter-spacing: .16em; }
+h1 { margin: 0; font-size: clamp(1.5rem, 4vw, 2.25rem); line-height: 1.2; }
+.intro { max-width: 680px; margin: 12px 0 0; color: #dbe8df; line-height: 1.7; }
+h2 { margin: 0; font-size: 1rem; }
+
+.quiet-button { color: #194f35; background: #e6eee8; white-space: nowrap; }
+.quiet-button:hover { background: #d2e2d7; }
+
+.credential-card {
+  display: grid;
+  grid-template-columns: 1fr minmax(300px, 1.2fr);
+  gap: 10px 24px;
+  align-items: center;
+  padding: 20px 32px;
+  border-bottom: 1px solid #dce4de;
+  background: #fff;
+}
+
+.credential-card p { margin: 5px 0 0; color: #5d6c63; font-size: .86rem; }
+.credential-form { display: flex; gap: 8px; }
+.credential-form input { min-width: 0; flex: 1; }
+.credential-state { grid-column: 2; }
+
+input, textarea {
+  width: 100%;
+  border: 1px solid #bdc9c0;
+  border-radius: 12px;
+  padding: 11px 13px;
+  color: #17251e;
+  background: #fbfcfb;
+}
+
+.conversation {
+  overflow: hidden;
+  border-radius: 0 0 22px 22px;
+  box-shadow: 0 16px 48px rgba(28, 55, 39, .12);
+  background: #fff;
+}
+
+.messages {
+  min-height: 360px;
+  max-height: min(58vh, 620px);
+  overflow-y: auto;
+  padding: 26px 32px;
+}
+
+.message {
+  width: fit-content;
+  max-width: min(78%, 720px);
+  margin: 0 0 18px;
+  border-radius: 5px 17px 17px;
+  padding: 13px 16px;
+  line-height: 1.7;
+  overflow-wrap: anywhere;
+}
+
+.message p { margin: 0; white-space: pre-wrap; }
+.assistant-message { border: 1px solid #dce6df; background: #f5f8f6; }
+.user-message { margin-left: auto; color: #fff; border-radius: 17px 5px 17px 17px; background: #1d6945; }
+.error-message { color: #7b211c; border: 1px solid #e9b9b5; background: #fff2f0; }
+
+.noscript-warning {
+  margin: 0;
+  padding: 14px 18px;
+  color: #7b211c;
+  border: 1px solid #e9b9b5;
+  background: #fff2f0;
+}
+
+.composer { padding: 18px 22px 20px; border-top: 1px solid #e1e7e2; background: #f8faf8; }
+.composer textarea { display: block; min-height: 82px; resize: vertical; background: #fff; }
+.composer-footer { display: flex; align-items: center; justify-content: space-between; gap: 16px; margin-top: 10px; }
+.composer-footer p { margin: 0; color: #68766d; font-size: .82rem; }
+
+.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }
+
+@media (max-width: 680px) {
+  .shell { width: 100%; margin: 0; }
+  .masthead { padding: 22px 18px; border-radius: 0; }
+  .intro { font-size: .9rem; }
+  .credential-card { grid-template-columns: 1fr; padding: 18px; }
+  .credential-form { flex-wrap: wrap; }
+  .credential-form input { flex-basis: 100%; }
+  .credential-state { grid-column: 1; }
+  .conversation { border-radius: 0; box-shadow: none; }
+  .messages { min-height: calc(100vh - 480px); padding: 20px 16px; }
+  .message { max-width: 92%; }
+  .composer { padding: 14px 12px; }
+}
+
+@media (prefers-reduced-motion: reduce) {
+  *, *::before, *::after { scroll-behavior: auto !important; }
+}