diff --git a/frontend/src/app/globals.css b/frontend/src/app/globals.css
index 0af4daf9..2cec35be 100644
--- a/frontend/src/app/globals.css
+++ b/frontend/src/app/globals.css
@@ -559,25 +559,25 @@ button:disabled { cursor: default; opacity: .45; }
.composer:focus-within { border-color: var(--color-action); box-shadow: 0 0 0 3px color-mix(in srgb, var(--color-action) 15%, transparent); }
.composer textarea { min-width: 0; min-height: 44px; max-height: 128px; flex: 1; resize: none; padding: 11px 0 8px; border: 0; outline: 0; background: transparent; color: var(--color-ink); line-height: 1.5; font-size: 16px; }
.composer button { width: 44px; height: 44px; display: grid; flex: 0 0 auto; place-items: center; border: 0; color: var(--color-on-dark); cursor: pointer; transition: background-color 120ms ease-out, transform 120ms ease-out; border-radius: var(--radius-md); background: var(--color-action); }
-.composer .composer-stop { background: var(--color-ink); }
-.composer .composer-stop:not(:disabled):hover { background: var(--color-ink-strong); }
-.composer-footer { width: min(760px, 100%); min-height: 44px; display: grid; grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr); align-items: center; margin: var(--space-1) auto 0; }
+.composer .composer-stop { background: var(--color-action); }
+.composer .composer-stop:not(:disabled):hover { background: var(--color-action-hover); }
+.composer-footer { width: min(760px, 100%); min-height: 44px; display: grid; grid-template-columns: max-content minmax(0, 1fr); align-items: center; margin: var(--space-1) auto 0; }
.composer-footer > p { grid-column: 2; margin: 0; color: var(--color-ink-tertiary); text-align: center; font-size: var(--type-overline); }
.composer-footer > p.composer-notice { display: block; color: var(--color-action-hover); }
-.model-selector-trigger { min-width: 0; max-width: 100%; min-height: 44px; display: inline-flex; grid-column: 1; align-items: center; justify-self: start; gap: var(--space-2); border: 0; padding: 0 var(--space-2); border-radius: var(--radius-md); background: transparent; color: var(--color-ink-secondary); cursor: pointer; transition: background-color 120ms ease-out, color 120ms ease-out; }
-.model-selector-trigger > b { min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-size: var(--type-caption); font-weight: 500; }
+.model-selector-trigger { width: fit-content; min-width: 0; max-width: min(100%, 360px); min-height: 44px; display: inline-flex; grid-column: 1; align-items: center; justify-self: start; gap: var(--space-2); border: 0; padding: 0 var(--space-2); border-radius: var(--radius-md); background: transparent; color: var(--color-ink-secondary); cursor: pointer; transition: background-color 120ms ease-out, color 120ms ease-out; }
+.model-selector-trigger > b { min-width: 0; overflow: visible; overflow-wrap: anywhere; text-align: left; white-space: normal; font-size: var(--type-caption); font-weight: 500; line-height: 1.35; }
.model-selector-trigger svg { width: 16px; height: 16px; flex: 0 0 auto; color: var(--color-ink-tertiary); transition: transform 120ms ease-out; }
.model-selector-trigger[data-popup-open] svg { transform: rotate(180deg); }
.model-selector-positioner { z-index: 30; outline: 0; }
-.model-selector-popup { width: min(180px, calc(100vw - var(--space-6))); border: 1px solid var(--color-border); padding: var(--space-3); border-radius: var(--radius-lg); background: var(--color-canvas); box-shadow: var(--shadow-elevated); transform-origin: var(--transform-origin); transition: opacity 120ms ease-out, transform 120ms var(--ease-out); }
+.model-selector-popup { width: max-content; min-width: 180px; max-width: min(420px, calc(100vw - var(--space-6))); border: 1px solid var(--color-border); padding: var(--space-3); border-radius: var(--radius-lg); background: var(--color-canvas); box-shadow: var(--shadow-elevated); transform-origin: var(--transform-origin); transition: opacity 120ms ease-out, transform 120ms var(--ease-out); }
.model-selector-popup[data-starting-style], .model-selector-popup[data-ending-style] { opacity: 0; transform: translateY(var(--space-1)); }
.model-selector-title { margin: 0; color: var(--color-ink); font-family: var(--font-display); font-size: var(--type-title-sm); font-weight: 400; }
.model-selector-options { display: grid; gap: var(--space-1); margin: var(--space-2) 0 0; padding: 0; border: 0; }
-.model-selector-option { min-height: 48px; display: grid; grid-template-columns: minmax(0, 1fr) 20px; align-items: center; gap: var(--space-3); padding: var(--space-2) var(--space-3); border: 1px solid transparent; border-radius: var(--radius-md); color: var(--color-ink-secondary); cursor: pointer; transition: border-color 120ms ease-out, background-color 120ms ease-out, color 120ms ease-out; }
+.model-selector-option { width: 100%; min-height: 48px; display: grid; grid-template-columns: auto 20px; align-items: center; gap: var(--space-3); padding: var(--space-2) var(--space-3); border: 1px solid transparent; border-radius: var(--radius-md); color: var(--color-ink-secondary); cursor: pointer; transition: border-color 120ms ease-out, background-color 120ms ease-out, color 120ms ease-out; }
.model-selector-option[data-selected] { border-color: var(--color-border); background: var(--color-selected); color: var(--color-ink); }
.model-selector-option:has(input:focus-visible) { outline: 3px solid color-mix(in srgb, var(--color-focus) 56%, transparent); outline-offset: 1px; }
-.model-selector-copy { min-width: 0; display: grid; gap: var(--space-1); }
-.model-selector-copy b { overflow: hidden; color: inherit; text-overflow: ellipsis; white-space: nowrap; font-size: var(--type-body-sm); font-weight: 500; }
+.model-selector-copy { width: max-content; min-width: 0; max-width: min(320px, calc(100vw - 96px)); display: grid; gap: var(--space-1); }
+.model-selector-copy b { overflow: visible; overflow-wrap: anywhere; color: inherit; white-space: normal; font-size: var(--type-body-sm); font-weight: 500; line-height: 1.35; }
.model-selector-check { width: 18px; height: 18px; opacity: 0; color: var(--color-action); }
.model-selector-option[data-selected] .model-selector-check { opacity: 1; }
@@ -1370,3 +1370,143 @@ input:disabled, select:disabled { color: var(--color-ink-tertiary); background:
font-size: var(--type-title-sm);
}
}
+
+/* Session conversation */
+:root {
+ --session-column-width: 760px;
+ --session-column-gutter: var(--space-6);
+}
+
+.conversation:not(.is-empty):not(.is-rectification) .message-list {
+ width: min(calc(var(--session-column-width) + (var(--session-column-gutter) * 2)), 100%);
+ padding: var(--space-10) var(--session-column-gutter) var(--space-24);
+}
+
+.conversation:not(.is-empty):not(.is-rectification) {
+ scrollbar-gutter: stable both-edges;
+}
+
+.conversation:not(.is-empty):not(.is-rectification) .message {
+ padding: 0;
+ animation: none;
+}
+
+.conversation:not(.is-empty):not(.is-rectification) .message + .message {
+ margin-top: var(--space-8);
+}
+
+.conversation:not(.is-empty):not(.is-rectification) .message-assistant {
+ gap: var(--space-4);
+}
+
+.conversation:not(.is-empty):not(.is-rectification) .message-assistant .agent-avatar {
+ width: 30px;
+ height: 30px;
+ flex-basis: 30px;
+ margin-top: 2px;
+ box-shadow: 0 0 0 1px color-mix(in srgb, var(--color-border) 82%, transparent);
+}
+
+.conversation:not(.is-empty):not(.is-rectification) .message-assistant .message-bubble {
+ padding: 0 0 var(--space-2);
+}
+
+.conversation:not(.is-empty):not(.is-rectification) .message-user .message-content {
+ max-width: min(72%, 560px);
+}
+
+.conversation:not(.is-empty):not(.is-rectification) .message-user .message-bubble {
+ padding: 10px var(--space-4);
+ border: 1px solid color-mix(in srgb, var(--color-action) 10%, var(--color-border));
+ border-radius: var(--radius-lg) var(--radius-lg) var(--radius-xs) var(--radius-lg);
+ background: color-mix(in srgb, var(--color-action-soft) 68%, var(--color-canvas));
+}
+
+.conversation:not(.is-empty):not(.is-rectification) .message-markdown {
+ line-height: 1.75;
+}
+
+.conversation:not(.is-empty):not(.is-rectification) .message-markdown p {
+ margin-bottom: var(--space-4);
+}
+
+.conversation:not(.is-empty):not(.is-rectification) .message-markdown h2,
+.conversation:not(.is-empty):not(.is-rectification) .message-markdown h3 {
+ margin: var(--space-8) 0 var(--space-3);
+}
+
+.conversation:not(.is-empty):not(.is-rectification) .message-markdown h2 {
+ font-size: var(--type-title-lg);
+}
+
+.conversation:not(.is-empty):not(.is-rectification) .message-markdown h3 {
+ font-size: var(--type-title-md);
+}
+
+.conversation:not(.is-empty):not(.is-rectification) + .composer-wrap {
+ padding: var(--space-4) var(--session-column-gutter) var(--space-5);
+ border-top-color: color-mix(in srgb, var(--color-border) 54%, transparent);
+}
+
+.conversation:not(.is-empty):not(.is-rectification) + .composer-wrap .composer-suggestions,
+.conversation:not(.is-empty):not(.is-rectification) + .composer-wrap .composer,
+.conversation:not(.is-empty):not(.is-rectification) + .composer-wrap .composer-footer {
+ width: min(var(--session-column-width), 100%);
+}
+
+.conversation:not(.is-empty):not(.is-rectification) + .composer-wrap .composer {
+ min-height: 64px;
+ border-radius: var(--radius-xl);
+ box-shadow: 0 1px 2px rgba(29, 29, 31, .05), 0 12px 32px -24px rgba(29, 29, 31, .34);
+}
+
+.conversation:not(.is-empty):not(.is-rectification) + .composer-wrap .composer-suggestions button {
+ background: color-mix(in srgb, var(--color-canvas-soft) 72%, var(--color-canvas));
+}
+
+@media (hover: hover) {
+ .conversation:not(.is-empty):not(.is-rectification) + .composer-wrap .composer-suggestions button:not(:disabled):hover {
+ border-color: color-mix(in srgb, var(--color-action) 36%, var(--color-border));
+ background: var(--color-action-soft);
+ color: var(--color-action-hover);
+ }
+}
+
+@media (max-width: 767px) {
+ :root {
+ --session-column-gutter: var(--space-4);
+ }
+
+ .conversation:not(.is-empty):not(.is-rectification) .message-list {
+ padding-top: var(--space-8);
+ padding-bottom: var(--space-16);
+ }
+
+ .conversation:not(.is-empty):not(.is-rectification) .message + .message {
+ margin-top: var(--space-6);
+ }
+
+ .conversation:not(.is-empty):not(.is-rectification) .message-assistant {
+ gap: var(--space-3);
+ }
+
+ .conversation:not(.is-empty):not(.is-rectification) .message-assistant .agent-avatar {
+ width: 28px;
+ height: 28px;
+ flex-basis: 28px;
+ }
+
+ .conversation:not(.is-empty):not(.is-rectification) .message-user .message-content {
+ max-width: 88%;
+ }
+
+ .conversation:not(.is-empty):not(.is-rectification) + .composer-wrap {
+ padding-top: var(--space-3);
+ padding-bottom: var(--space-3);
+ }
+
+ .conversation:not(.is-empty):not(.is-rectification) + .composer-wrap .composer {
+ min-height: 56px;
+ border-radius: var(--radius-lg);
+ }
+}
diff --git a/frontend/src/components/chat-message-row.tsx b/frontend/src/components/chat-message-row.tsx
index 0cd4eb8f..ae2c3ee8 100644
--- a/frontend/src/components/chat-message-row.tsx
+++ b/frontend/src/components/chat-message-row.tsx
@@ -1,20 +1,48 @@
+"use client";
+
+import { useGSAP } from "@gsap/react";
+import gsap from "gsap";
+import { useRef } from "react";
+
import { AgentActivityStatus } from "@/components/agent-activity-status";
import { ChatMessageContent } from "@/components/chat-message-content";
import type { ChatMessageView } from "@/lib/chat-message-view";
+gsap.registerPlugin(useGSAP);
+
export function AgentAvatar() {
return ;
}
export function ChatMessageRow({ message }: { readonly message: ChatMessageView }) {
+ const messageRow = useRef(null);
const assistantLabel = message.state === "thinking"
? "Jyotisha 正在分析"
: message.state === "streaming"
? "Jyotisha 正在回答"
: "Jyotisha";
+ useGSAP(() => {
+ if (!messageRow.current) return;
+ const motion = gsap.matchMedia();
+ motion.add("(prefers-reduced-motion: no-preference)", () => {
+ gsap.fromTo(messageRow.current, {
+ autoAlpha: 0,
+ y: message.role === "user" ? 8 : 12,
+ }, {
+ autoAlpha: 1,
+ clearProps: "opacity,transform,visibility",
+ duration: message.role === "user" ? 0.3 : 0.42,
+ ease: "power3.out",
+ y: 0,
+ });
+ });
+ return () => motion.revert();
+ }, { scope: messageRow });
+
return (
diff --git a/frontend/tests/session-conversation-layout.test.ts b/frontend/tests/session-conversation-layout.test.ts
new file mode 100644
index 00000000..07ab640b
--- /dev/null
+++ b/frontend/tests/session-conversation-layout.test.ts
@@ -0,0 +1,30 @@
+import assert from "node:assert/strict";
+import { readFileSync } from "node:fs";
+import test from "node:test";
+
+const readProjectFile = (path: string) => readFileSync(new URL(`../${path}`, import.meta.url), "utf8");
+const globalStyles = readProjectFile("src/app/globals.css");
+const messageRowSource = readProjectFile("src/components/chat-message-row.tsx");
+
+test("aligns the session transcript and composer to one readable column", () => {
+ assert.match(globalStyles, /--session-column-width:\s*760px/);
+ assert.match(globalStyles, /\.conversation:not\(\.is-empty\):not\(\.is-rectification\) \.message-list\s*\{[^}]*width:\s*min\(calc\(var\(--session-column-width\)/);
+ assert.match(globalStyles, /\.conversation:not\(\.is-empty\):not\(\.is-rectification\) \+ \.composer-wrap \.composer[^\{]*\{[^}]*width:\s*min\(var\(--session-column-width\),\s*100%\)/);
+ assert.match(globalStyles, /\.conversation:not\(\.is-empty\):not\(\.is-rectification\) \+ \.composer-wrap \.composer-suggestions[^\{]*[\s\S]*?width:\s*min\(var\(--session-column-width\),\s*100%\)/);
+});
+
+test("keeps message motion restrained and honors reduced-motion preferences", () => {
+ assert.match(messageRowSource, /gsap\.matchMedia\(\)/);
+ assert.match(messageRowSource, /prefers-reduced-motion:\s*no-preference/);
+ assert.match(messageRowSource, /duration:\s*message\.role === "user" \? 0\.3 : 0\.42/);
+ assert.match(messageRowSource, /clearProps:\s*"opacity,transform,visibility"/);
+});
+
+test("lets model controls fit their labels and keeps the stop action on-brand", () => {
+ assert.match(globalStyles, /\.model-selector-trigger\s*\{[^}]*width:\s*fit-content/);
+ assert.match(globalStyles, /\.model-selector-popup\s*\{[^}]*width:\s*max-content[^}]*min-width:\s*180px[^}]*max-width:\s*min\(420px,/);
+ assert.match(globalStyles, /\.model-selector-copy b\s*\{[^}]*overflow:\s*visible[^}]*white-space:\s*normal/);
+ assert.doesNotMatch(globalStyles, /\.model-selector-copy b\s*\{[^}]*text-overflow:\s*ellipsis/);
+ assert.match(globalStyles, /\.composer \.composer-stop\s*\{[^}]*background:\s*var\(--color-action\)/);
+ assert.match(globalStyles, /\.composer \.composer-stop:not\(:disabled\):hover\s*\{[^}]*background:\s*var\(--color-action-hover\)/);
+});