diff --git a/web/src/components/canvas/canvas-cloud-agent.css b/web/src/components/canvas/canvas-cloud-agent.css
index f3edc8ce4..640d61f09 100644
--- a/web/src/components/canvas/canvas-cloud-agent.css
+++ b/web/src/components/canvas/canvas-cloud-agent.css
@@ -8,6 +8,23 @@
     z-index: calc(var(--z-modal-overlay) + 1000) !important;
 }
 
+.agent-model-picker-popover .canvas-model-picker-menu {
+    width: min(340px, calc(100vw - 24px)) !important;
+    max-width: min(340px, calc(100vw - 24px)) !important;
+}
+
+.agent-model-picker-popover .canvas-model-picker-two-pane {
+    grid-template-columns: minmax(0, 1fr) !important;
+}
+
+.agent-model-picker-popover .canvas-model-picker-brand-rail {
+    display: none !important;
+}
+
+.agent-model-picker-popover .canvas-model-picker-model-pane {
+    min-width: 0 !important;
+}
+
 /* Flex 子页必须允许收缩，长模型名和 Skill 文案不能决定窗口宽度。 */
 .canvas-agent-panel > div,
 .canvas-agent-settings,
diff --git a/web/src/components/layout/app-changelog-dialog.tsx b/web/src/components/layout/app-changelog-dialog.tsx
index 32d7cf701..f25935047 100644
--- a/web/src/components/layout/app-changelog-dialog.tsx
+++ b/web/src/components/layout/app-changelog-dialog.tsx
@@ -11,7 +11,6 @@ export function AppChangelogDialog({ open, onClose }: { open: boolean; onClose:
 
     return (
         <AppModal
-            flush
             rootClassName="app-spatial-modal app-changelog-modal"
             title={
                 <div className="app-changelog-heading">
@@ -30,6 +29,7 @@ export function AppChangelogDialog({ open, onClose }: { open: boolean; onClose:
             footer={null}
             centered
             onCancel={onClose}
+            styles={{ body: { padding: 0 } }}
             modalRender={(node) => (
                 <motion.div initial={reducedMotion ? false : { opacity: 0, y: 14, scale: 0.975 }} animate={{ opacity: 1, y: 0, scale: 1 }} transition={{ duration: aceternityMotion.duration.panel, ease: aceternityMotion.easing.enter }}>
                     {node}
diff --git a/web/src/components/model-picker.tsx b/web/src/components/model-picker.tsx
index 7414f94f5..17f6dfd37 100644
--- a/web/src/components/model-picker.tsx
+++ b/web/src/components/model-picker.tsx
@@ -258,7 +258,7 @@ export function ModelPicker({
                                             disabledReason={disabledReason}
                                             showDescription={selected || previewedModel === displayModel}
                                         />
-                                        {selected ? <Check className="canvas-model-picker-option-check" style={{ color: theme.node.activeStroke }} /> : null}
+                                        {selected ? <Check className="canvas-model-picker-option-check ml-1 shrink-0" style={{ color: theme.node.activeStroke }} /> : null}
                                     </button>
                                 );
                             })}
@@ -353,13 +353,17 @@ function ModelLabel({
             <span className="grid size-6 shrink-0 place-items-center rounded-md" style={{ background: theme.toolbar.itemHover }}>
                 <ModelIcon config={config} model={model} />
             </span>
-            <span className="min-w-0 flex-1 overflow-hidden">
+            <span className="min-w-44 flex-1 overflow-hidden">
                 <span className="block min-w-0 truncate text-[var(--fs-label)] font-medium leading-none">{pickerModelDisplayName(config, model, showConfiguredModelName)}</span>
                 <span className={cn("canvas-model-picker-description mt-1 block truncate text-[var(--fs-tiny)]", showDescription && "is-visible")} style={{ color: theme.node.muted }} title={capabilitySummary}>
                     {capabilitySummary}
                 </span>
             </span>
-            {showPrice ? <ModelPrice price={modelMenuPrice(config, model, capability, true)} /> : null}
+            {showPrice ? (
+                <span className="ml-auto shrink-0 pl-2">
+                    <ModelPrice price={modelMenuPrice(config, model, capability, true)} />
+                </span>
+            ) : null}
             {!creationVariant && meta.time ? (
                 <span className="shrink-0 rounded-full px-1.5 py-0.5 text-[var(--fs-tiny)] tabular-nums" style={{ background: theme.toolbar.itemHover, color: theme.node.muted }}>
                     {meta.time}
diff --git a/web/src/lib/app-theme.ts b/web/src/lib/app-theme.ts
index dc52613fd..219a2315b 100644
--- a/web/src/lib/app-theme.ts
+++ b/web/src/lib/app-theme.ts
@@ -354,6 +354,20 @@ export function getAntThemeConfig(dark: boolean, skinID: unknown = "classic"): T
                 headerFontSize: 15,
                 bodyPadding: 18,
             },
+            Message: {
+                contentBg: elevatedBackground,
+                contentPadding: "10px 18px",
+            },
+            Notification: {
+                colorBgElevated: elevatedBackground,
+            },
+            Tooltip: {
+                colorBgSpotlight: elevatedBackground,
+                colorTextLightSolid: color.selectedFg,
+            },
+            Popover: {
+                colorBgElevated: elevatedBackground,
+            },
         },
     };
 }
@@ -385,6 +399,9 @@ export function getWorkspaceAntThemeConfig(): ThemeConfig {
             Dropdown: { borderRadiusLG: 16, controlItemBgHover: "var(--user-surface-muted)", paddingBlock: 6 },
             Modal: { borderRadiusLG: 20 },
             Popconfirm: { borderRadiusLG: 16 },
+            Message: { borderRadiusLG: 14, contentPadding: "10px 18px" },
+            Notification: { borderRadiusLG: 18 },
+            Tooltip: { borderRadius: 8 },
         },
     };
 }
diff --git a/web/src/pages/plugins/index.tsx b/web/src/pages/plugins/index.tsx
index 80603a2ff..ad3ed4ea5 100644
--- a/web/src/pages/plugins/index.tsx
+++ b/web/src/pages/plugins/index.tsx
@@ -87,7 +87,6 @@ export default function PluginsPage() {
     const [detailsRestoreFocus, setDetailsRestoreFocus] = useState(false);
     const [search, setSearch] = useState("");
     const [categoryFilter, setCategoryFilter] = useState("all");
-    const [scrollTarget, setScrollTarget] = useState<string | null>(null);
     const [statusFilter, setStatusFilter] = useState<"all" | "enabled" | "disabled">("all");
     const [trustFilter, setTrustFilter] = useState<"all" | "trusted">("all");
     const [eagleBaseUrl, setEagleBaseUrl] = useState("http://localhost:41595");
@@ -96,7 +95,6 @@ export default function PluginsPage() {
     const [eagleFolders, setEagleFolders] = useState<EagleFolder[]>([]);
     const [eagleFoldersLoading, setEagleFoldersLoading] = useState(false);
     const [eagleFoldersError, setEagleFoldersError] = useState("");
-    const sectionRefs = useRef<Record<string, HTMLElement | null>>({});
 
     useEffect(() => {
         for (const plugin of builtinPlugins) ensurePlugin(plugin.manifest);
@@ -168,24 +166,15 @@ export default function PluginsPage() {
         [categoryFilter, filteredPlugins],
     );
 
+    const scrollContainerRef = useRef<HTMLDivElement>(null);
+
     const selectCategory = (key: string) => {
         setCategoryFilter(key);
-        setScrollTarget(key === "all" ? null : key);
+        if (scrollContainerRef.current) {
+            scrollContainerRef.current.scrollTop = 0;
+        }
     };
 
-    useEffect(() => {
-        if (!scrollTarget) return;
-        const section = sectionRefs.current[scrollTarget];
-        if (!section) return;
-
-        const frame = window.requestAnimationFrame(() => {
-            const reducedMotion = window.matchMedia("(prefers-reduced-motion: reduce)").matches;
-            section.scrollIntoView({ behavior: reducedMotion ? "auto" : "smooth", block: "start" });
-            setScrollTarget(null);
-        });
-        return () => window.cancelAnimationFrame(frame);
-    }, [pluginSections, scrollTarget]);
-
     const categoryCounts = useMemo(() => {
         const visiblePlugins = registeredPlugins.filter((plugin) => user?.role === "admin" || features.systemPluginsVisibleToUsers || isOfficialApplicationPluginId(plugin.manifest.id));
         const counts: Record<string, number> = { all: visiblePlugins.length, text: 0, image: 0, video: 0, audio: 0, payment: 0, other: 0 };
@@ -248,7 +237,7 @@ export default function PluginsPage() {
 
     return (
         <main className="app-workspace-page plugins-page flex h-full min-h-0 flex-col text-foreground">
-            <div className="app-workspace-scroll min-h-0 flex-1 overflow-y-auto">
+            <div ref={scrollContainerRef} className="app-workspace-scroll min-h-0 flex-1 overflow-y-auto">
                 <div className="plugins-page-layout">
                     <aside className="plugins-sidebar" aria-label="插件分类">
                         <div className="plugins-sidebar-heading">
@@ -334,15 +323,11 @@ export default function PluginsPage() {
                         {filteredPlugins.length ? (
                             <div className="plugins-sections">
                                 {pluginSections.map((section) => {
-                                    if (!section.plugins.length) return null;
                                     const SectionIcon = section.icon;
                                     return (
                                         <section
                                             key={section.key}
                                             id={`plugin-section-${section.key}`}
-                                            ref={(element) => {
-                                                sectionRefs.current[section.key] = element;
-                                            }}
                                             className="plugin-section"
                                             data-category={section.key === "image" ? "creative" : section.key === "video" ? "drama" : section.key === "audio" ? "social" : section.key === "payment" ? "ecommerce" : undefined}
                                         >
@@ -356,114 +341,120 @@ export default function PluginsPage() {
                                                 </div>
                                                 <span className="plugin-section-count">{section.plugins.length}</span>
                                             </header>
-                                            <div className="plugins-grid">
-                                                {section.plugins.map((plugin) => {
-                                                    const installation = installations.find((item) => item.manifest.id === plugin.manifest.id);
-                                                    const remote = backendPluginById.get(plugin.manifest.id);
-                                                    const enabled = isPluginEnabled(plugin, installation);
-                                                    const trusted = Boolean(plugin.manifest.trusted);
-                                                    const state = pluginStates[plugin.manifest.id];
-                                                    const sourceLabel = pluginSourceLabel(plugin, state);
-                                                    const canConfigure = canConfigurePlugin(plugin);
-                                                    return (
-                                                        <section key={plugin.manifest.id} className={`product-collection-card plugin-card library-card-surface${trusted ? " is-trusted" : ""}`}>
-                                                            <button
-                                                                type="button"
-                                                                className="plugin-card-main"
-                                                                aria-label={`查看${plugin.manifest.name}文档`}
-                                                                onClick={(event) => {
-                                                                    const openedByKeyboard = event.detail === 0;
-                                                                    setDetailsRestoreFocus(openedByKeyboard);
-                                                                    setDetailsPluginId(plugin.manifest.id);
-                                                                    if (!openedByKeyboard) event.currentTarget.blur();
-                                                                }}
-                                                            >
-                                                                <div className="plugin-card-heading">
-                                                                    <span className={`plugin-icon-tile${trusted ? " is-trusted" : ""}`} aria-hidden="true">
-                                                                        <SectionIcon className="size-5" />
-                                                                    </span>
-                                                                    <div className="min-w-0 flex-1">
-                                                                        <div className="plugin-card-title-row">
-                                                                            <h3>{plugin.manifest.name}</h3>
-                                                                            <span className="plugin-version">v{plugin.manifest.version}</span>
-                                                                        </div>
-                                                                        <div className="plugin-card-labels">
-                                                                            <span className={`plugin-source-label${sourceLabel === "系统插件" ? " is-system" : ""}`}>{sourceLabel}</span>
-                                                                            {trusted ? (
-                                                                                <span className="plugin-trust-label">
-                                                                                    <ShieldCheck className="size-3.5" />
-                                                                                    可信插件
+                                            {section.plugins.length ? (
+                                                <div className="plugins-grid">
+                                                    {section.plugins.map((plugin) => {
+                                                        const installation = installations.find((item) => item.manifest.id === plugin.manifest.id);
+                                                        const remote = backendPluginById.get(plugin.manifest.id);
+                                                        const enabled = isPluginEnabled(plugin, installation);
+                                                        const trusted = Boolean(plugin.manifest.trusted);
+                                                        const state = pluginStates[plugin.manifest.id];
+                                                        const sourceLabel = pluginSourceLabel(plugin, state);
+                                                        const canConfigure = canConfigurePlugin(plugin);
+                                                        return (
+                                                            <section key={plugin.manifest.id} className={`product-collection-card plugin-card library-card-surface${trusted ? " is-trusted" : ""}`}>
+                                                                <button
+                                                                    type="button"
+                                                                    className="plugin-card-main"
+                                                                    aria-label={`查看${plugin.manifest.name}文档`}
+                                                                    onClick={(event) => {
+                                                                        const openedByKeyboard = event.detail === 0;
+                                                                        setDetailsRestoreFocus(openedByKeyboard);
+                                                                        setDetailsPluginId(plugin.manifest.id);
+                                                                        if (!openedByKeyboard) event.currentTarget.blur();
+                                                                    }}
+                                                                >
+                                                                    <div className="plugin-card-heading">
+                                                                        <span className={`plugin-icon-tile${trusted ? " is-trusted" : ""}`} aria-hidden="true">
+                                                                            <SectionIcon className="size-5" />
+                                                                        </span>
+                                                                        <div className="min-w-0 flex-1">
+                                                                            <div className="plugin-card-title-row">
+                                                                                <h3>{plugin.manifest.name}</h3>
+                                                                                <span className="plugin-version">v{plugin.manifest.version}</span>
+                                                                            </div>
+                                                                            <div className="plugin-card-labels">
+                                                                                <span className={`plugin-source-label${sourceLabel === "系统插件" ? " is-system" : ""}`}>{sourceLabel}</span>
+                                                                                {trusted ? (
+                                                                                    <span className="plugin-trust-label">
+                                                                                        <ShieldCheck className="size-3.5" />
+                                                                                        可信插件
+                                                                                    </span>
+                                                                                ) : null}
+                                                                                <span className="plugin-category-label">
+                                                                                    {contributionKindsFor(plugin.manifest)
+                                                                                        .map((kind) => categoryLabels[kind] ?? kind)
+                                                                                        .join(" · ")}
                                                                                 </span>
-                                                                            ) : null}
-                                                                            <span className="plugin-category-label">
-                                                                                {contributionKindsFor(plugin.manifest)
-                                                                                    .map((kind) => categoryLabels[kind] ?? kind)
-                                                                                    .join(" · ")}
-                                                                            </span>
+                                                                            </div>
                                                                         </div>
                                                                     </div>
-                                                                </div>
 
-                                                                <p className="plugin-card-description">{plugin.manifest.description}</p>
+                                                                    <p className="plugin-card-description">{plugin.manifest.description}</p>
 
-                                                                <div className="plugin-card-meta">
-                                                                    <span>
-                                                                        <CalendarDays className="size-3.5" />
-                                                                        发布 {formatPluginDate(plugin.manifest.publishedAt)}
-                                                                    </span>
-                                                                    <span>
-                                                                        <Clock3 className="size-3.5" />
-                                                                        更新 {formatPluginDate(plugin.manifest.updatedAt)}
+                                                                    <div className="plugin-card-meta">
+                                                                        <span>
+                                                                            <CalendarDays className="size-3.5" />
+                                                                            发布 {formatPluginDate(plugin.manifest.publishedAt)}
+                                                                        </span>
+                                                                        <span>
+                                                                            <Clock3 className="size-3.5" />
+                                                                            更新 {formatPluginDate(plugin.manifest.updatedAt)}
+                                                                        </span>
+                                                                    </div>
+
+                                                                    <div className="plugin-card-tags">
+                                                                        {(plugin.manifest.surfaces || []).map((surface) => (
+                                                                            <span key={surface}>{surfaceLabels[surface] ?? surface}</span>
+                                                                        ))}
+                                                                        {providerCapabilitiesFor(plugin.manifest).map((capability) => (
+                                                                            <span key={capability}>{capabilityLabel(capability)}</span>
+                                                                        ))}
+                                                                        {plugin.manifest.contributes.providers?.some((provider) => provider.poll) ? <span>异步轮询</span> : null}
+                                                                        <span>{plugin.manifest.permissions.length} 项能力</span>
+                                                                    </div>
+                                                                </button>
+
+                                                                <div className="plugin-card-actions">
+                                                                    <span role="status" className={`settings-channel-status ${enabled ? "is-ready" : ""}`}>
+                                                                        <i aria-hidden="true" />
+                                                                        {!state?.platformAvailable && state?.blockedReason ? state.blockedReason : enabled ? "已启用" : "已停用"}
                                                                     </span>
+                                                                    <Switch
+                                                                        className="plugin-state-switch"
+                                                                        disabled={!state?.canToggle}
+                                                                        checked={enabled}
+                                                                        aria-label={`${plugin.manifest.name}，当前${enabled ? "已启用，点击停用" : "已停用，点击启用"}`}
+                                                                        title={state?.blockedReason}
+                                                                        onChange={(checked) => void togglePlugin(plugin, checked)}
+                                                                    />
+                                                                    {canConfigure ? (
+                                                                        <Button
+                                                                            className="plugin-settings-button"
+                                                                            icon={<Settings2 className="size-4" />}
+                                                                            aria-expanded={settingsPluginId === plugin.manifest.id}
+                                                                            aria-haspopup="dialog"
+                                                                            onClick={() => setSettingsPluginId(plugin.manifest.id)}
+                                                                        >
+                                                                            设置
+                                                                        </Button>
+                                                                    ) : null}
                                                                 </div>
 
-                                                                <div className="plugin-card-tags">
-                                                                    {(plugin.manifest.surfaces || []).map((surface) => (
-                                                                        <span key={surface}>{surfaceLabels[surface] ?? surface}</span>
-                                                                    ))}
-                                                                    {providerCapabilitiesFor(plugin.manifest).map((capability) => (
-                                                                        <span key={capability}>{capabilityLabel(capability)}</span>
-                                                                    ))}
-                                                                    {plugin.manifest.contributes.providers?.some((provider) => provider.poll) ? <span>异步轮询</span> : null}
-                                                                    <span>{plugin.manifest.permissions.length} 项能力</span>
-                                                                </div>
-                                                            </button>
-
-                                                            <div className="plugin-card-actions">
-                                                                <span role="status" className={`settings-channel-status ${enabled ? "is-ready" : ""}`}>
-                                                                    <i aria-hidden="true" />
-                                                                    {!state?.platformAvailable && state?.blockedReason ? state.blockedReason : enabled ? "已启用" : "已停用"}
-                                                                </span>
-                                                                <Switch
-                                                                    className="plugin-state-switch"
-                                                                    disabled={!state?.canToggle}
-                                                                    checked={enabled}
-                                                                    aria-label={`${plugin.manifest.name}，当前${enabled ? "已启用，点击停用" : "已停用，点击启用"}`}
-                                                                    title={state?.blockedReason}
-                                                                    onChange={(checked) => void togglePlugin(plugin, checked)}
-                                                                />
-                                                                {canConfigure ? (
-                                                                    <Button
-                                                                        className="plugin-settings-button"
-                                                                        icon={<Settings2 className="size-4" />}
-                                                                        aria-expanded={settingsPluginId === plugin.manifest.id}
-                                                                        aria-haspopup="dialog"
-                                                                        onClick={() => setSettingsPluginId(plugin.manifest.id)}
-                                                                    >
-                                                                        设置
-                                                                    </Button>
+                                                                {installation?.lastError || remote?.error ? (
+                                                                    <Typography.Text type="danger" className="plugin-error" role="alert">
+                                                                        {installation?.lastError || remote?.error}
+                                                                    </Typography.Text>
                                                                 ) : null}
-                                                            </div>
-
-                                                            {installation?.lastError || remote?.error ? (
-                                                                <Typography.Text type="danger" className="plugin-error" role="alert">
-                                                                    {installation?.lastError || remote?.error}
-                                                                </Typography.Text>
-                                                            ) : null}
-                                                        </section>
-                                                    );
-                                                })}
-                                            </div>
+                                                            </section>
+                                                        );
+                                                    })}
+                                                </div>
+                                            ) : (
+                                                <div className="plugin-section-empty-hint">
+                                                    <span>暂无该类型的插件</span>
+                                                </div>
+                                            )}
                                         </section>
                                     );
                                 })}
diff --git a/web/src/pages/plugins/plugins.css b/web/src/pages/plugins/plugins.css
index e592bc5b8..6e7b3a7f1 100644
--- a/web/src/pages/plugins/plugins.css
+++ b/web/src/pages/plugins/plugins.css
@@ -18,10 +18,13 @@
     padding: 0 0 var(--space-8);
 }
 
+.plugins-page-content .collection-toolbar {
+    margin-top: var(--space-2);
+}
+
 .plugins-page-layout {
     display: grid;
     width: min(var(--product-content-max), calc(100% - 64px));
-    min-height: 100%;
     margin: 24px auto 0;
     grid-template-columns: minmax(0, 1fr);
     align-items: start;
@@ -31,7 +34,7 @@
     position: static;
     min-width: 0;
     min-height: 0;
-    padding: 0 0 var(--space-4);
+    padding: 0;
 }
 
 .plugins-sidebar-heading {
@@ -250,6 +253,19 @@
     margin-top: var(--space-3);
 }
 
+.plugin-section-empty-hint {
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    min-height: 140px;
+    margin-top: var(--space-3);
+    border-radius: var(--plugins-card-radius);
+    border: 1px dashed var(--user-border);
+    background: color-mix(in srgb, var(--foreground) 2%, transparent);
+    color: color-mix(in srgb, var(--foreground) 45%, transparent);
+    font-size: var(--fs-label);
+}
+
 .plugin-card {
     display: flex;
     min-width: 0;
@@ -841,7 +857,7 @@
         position: static;
         min-height: 0;
         border-right: 0;
-        padding: 0 0 var(--space-4);
+        padding: 0;
     }
 
     .plugins-sidebar-heading {
diff --git a/web/src/pages/projects/index.tsx b/web/src/pages/projects/index.tsx
index 5aba73350..f08bf9801 100644
--- a/web/src/pages/projects/index.tsx
+++ b/web/src/pages/projects/index.tsx
@@ -222,6 +222,8 @@ export default function ProjectsPage() {
                             variant="creation"
                             placeholder="选择文本模型"
                             showSelectedPrice={false}
+                            showOptionPrices
+                            popoverClassName="agent-model-picker-popover"
                         />
                         <Button type="default" icon={<Sparkles className="size-3.5" />} disabled={!storyDraft.trim() || generating} loading={generating} onClick={() => void generateStory()}>AI 生成章节</Button>
                         <Button type="primary" icon={<Plus className="size-3.5" />} onClick={() => openCreate(createSource)}>开始创作</Button>
diff --git a/web/src/styles/globals.css b/web/src/styles/globals.css
index 6dbe0021f..d3f4ab21d 100644
--- a/web/src/styles/globals.css
+++ b/web/src/styles/globals.css
@@ -1305,6 +1305,41 @@
         --workspace-overlay-shadow: 0 30px 84px rgba(0, 0, 0, 0.62), 0 8px 24px rgba(0, 0, 0, 0.34);
     }
 
+    /* 全局轻量通知与消息提示框 */
+    .ant-message-notice .ant-message-notice-content {
+        color: var(--foreground) !important;
+        background: var(--color-surface, var(--workspace-overlay-bg-strong, #ffffff)) !important;
+        border: 1px solid var(--color-border, var(--workspace-overlay-border, rgba(0, 0, 0, 0.12))) !important;
+        box-shadow: 0 8px 30px rgba(0, 0, 0, 0.18) !important;
+    }
+
+    .dark .ant-message-notice .ant-message-notice-content,
+    .dark body .ant-message-notice-content {
+        color: #f4f4f5 !important;
+        background: #1e1e20 !important;
+        border-color: rgba(255, 255, 255, 0.16) !important;
+        box-shadow: 0 12px 36px rgba(0, 0, 0, 0.55) !important;
+    }
+
+    .ant-notification-notice {
+        color: var(--foreground) !important;
+        background: var(--color-surface, var(--workspace-overlay-bg-strong, #ffffff)) !important;
+        border: 1px solid var(--color-border, var(--workspace-overlay-border, rgba(0, 0, 0, 0.12))) !important;
+    }
+
+    .dark .ant-notification-notice,
+    .dark body .ant-notification-notice {
+        color: #f4f4f5 !important;
+        background: #1e1e20 !important;
+        border-color: rgba(255, 255, 255, 0.16) !important;
+    }
+
+    .dark .ant-tooltip .ant-tooltip-inner {
+        color: #f4f4f5 !important;
+        background: #1e1e20 !important;
+        border: 1px solid rgba(255, 255, 255, 0.14) !important;
+    }
+
     body.app-spatial-overlays :where(
         .ant-dropdown-menu,
         .ant-select-dropdown,
@@ -7746,7 +7781,7 @@ html:not(.dark) .creation-studio-control:hover,
 
     .canvas-model-picker-menu {
         width: max-content !important;
-        min-width: var(--canvas-model-picker-trigger-width, 0px);
+        min-width: max(var(--canvas-model-picker-trigger-width, 0px), 260px);
         max-width: calc(100vw - 24px);
         max-height: min(420px, calc(100vh - 32px));
         overflow-x: hidden;
@@ -7806,6 +7841,9 @@ html:not(.dark) .creation-studio-control:hover,
         flex: 1 1 auto;
         min-width: 0;
         overflow: hidden;
+        display: flex;
+        align-items: center;
+        width: 100%;
     }
 
     .canvas-model-picker-popover .canvas-model-picker-option > span:first-child > span:nth-child(2) {
@@ -15947,7 +15985,7 @@ html:not(.dark) .creation-history-drawer-root {
 
 /* 空态：banner 剧照 + 三张欢迎卡 */
 .assets-empty { display: flex; width: 100%; flex-direction: column; align-items: center; padding: 5vh 0 8vh; }
-.assets-empty-banner { position: relative; width: min(720px, calc(100% - 24px)); height: 180px; }
+.assets-empty-banner { position: relative; width: min(720px, calc(100% - 24px)); height: 180px; margin-bottom: 24px; }
 .assets-empty-banner-frame { position: absolute; overflow: hidden; border: 1px solid color-mix(in srgb, var(--foreground) 14%, transparent); border-radius: var(--r-lg); box-shadow: var(--elevation-card); }
 .assets-empty-banner-frame img { width: 100%; height: 100%; object-fit: cover; filter: grayscale(.45) contrast(.94) saturate(.7); }
 .assets-empty-banner-frame.is-back { top: 16px; left: 2%; width: 24%; height: 132px; transform: rotate(-6deg); opacity: .45; }
@@ -15955,9 +15993,9 @@ html:not(.dark) .creation-history-drawer-root {
 .assets-empty-banner-frame.is-front { top: 20px; right: 2%; width: 24%; height: 132px; transform: rotate(6deg); opacity: .5; }
 .assets-empty-banner-frame.is-main::after { position: absolute; inset: 0; background: linear-gradient(180deg, transparent 40%, color-mix(in srgb, var(--foreground) 55%, transparent)); content: ""; }
 .assets-empty-banner-frame span { position: absolute; right: 12px; bottom: 10px; z-index: 1; color: #fff; font-size: var(--fs-micro); letter-spacing: .08em; text-shadow: 0 1px 6px rgba(0, 0, 0, .5); }
-.assets-empty-banner-caption { position: absolute; right: 19%; bottom: 2px; color: color-mix(in srgb, var(--foreground) 44%, transparent); font-size: var(--fs-micro); letter-spacing: .1em; }
+.assets-empty-banner-caption { position: absolute; left: 0; right: 0; bottom: -22px; text-align: center; color: color-mix(in srgb, var(--foreground) 44%, transparent); font-size: var(--fs-micro); letter-spacing: .1em; z-index: 3; }
 .assets-empty-banner-caption span { color: var(--workspace-accent); font-weight: 620; font-variant-numeric: tabular-nums; }
-.assets-empty-cards { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; width: min(680px, calc(100% - 24px)); margin-top: 34px; }
+.assets-empty-cards { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; width: min(680px, calc(100% - 24px)); margin-top: 24px; }
 .assets-empty-card {
     display: flex;
     flex-direction: column;
@@ -17402,13 +17440,32 @@ html:not(.dark) .creation-home .creation-user-message-copy-wrap { box-shadow: 0
     flex: 0 0 34px;
     place-items: center;
     border-radius: 10px;
-    color: rgba(0, 0, 0, .46);
+    color: var(--user-ink-muted);
     transition: background-color .18s ease, color .18s ease;
 }
 
 .app-user-workspace .app-workspace-sidebar-notification:hover {
-    background: rgba(72, 72, 73, .055);
-    color: #171717;
+    background: var(--user-surface-hover);
+    color: var(--user-ink);
+}
+
+.dark .app-user-workspace .app-workspace-sidebar-notification,
+.dark .app-user-workspace .app-workspace-topbar-icon-button,
+.dark .app-user-workspace .app-workspace-sidebar-rail-button {
+    color: rgba(255, 255, 255, 0.65) !important;
+}
+
+.dark .app-user-workspace .app-workspace-sidebar-notification:hover,
+.dark .app-user-workspace .app-workspace-topbar-icon-button:hover,
+.dark .app-user-workspace .app-workspace-sidebar-rail-button:hover {
+    background: rgba(255, 255, 255, 0.08) !important;
+    color: #ffffff !important;
+}
+
+.dark .app-user-workspace .app-workspace-topbar-icon-button svg,
+.dark .app-user-workspace .app-workspace-sidebar-notification svg,
+.dark .app-user-workspace .app-workspace-sidebar-rail-button svg {
+    color: currentColor !important;
 }
 
 .app-user-workspace .app-workspace-sidebar-notification svg {
@@ -17732,7 +17789,25 @@ html:not(.dark) .creation-home .creation-user-message-copy-wrap { box-shadow: 0
 .dark .app-user-workspace .app-workspace-sidebar-profile-menu button:hover { background: rgba(108,94,236,.15); color: #dcd8ff; }
 .dark .app-user-workspace .creation-home-heading h1 { color: #f5f5f5; }
 .dark .app-user-workspace .creation-home-heading p,
-.dark .app-user-workspace .app-workspace-topbar-breadcrumb { color: rgba(255, 255, 255, .48); }
+.dark .app-user-workspace .app-workspace-topbar-breadcrumb > span:not(.truncate) {
+    color: rgba(255, 255, 255, 0.28) !important;
+}
+
+.dark .app-user-workspace .app-workspace-sidebar-collapse-button {
+    color: rgba(255, 255, 255, 0.55) !important;
+    opacity: 0.85;
+}
+
+.dark .app-user-workspace .app-workspace-sidebar-collapse-button:hover,
+.dark .app-user-workspace .app-workspace-sidebar-collapse-button:focus-visible {
+    background: rgba(255, 255, 255, 0.08) !important;
+    color: #ffffff !important;
+    opacity: 1;
+}
+
+.dark .app-user-workspace .app-workspace-sidebar-collapse-button svg {
+    color: currentColor !important;
+}
 .dark .app-user-workspace .app-workspace-topbar { border-bottom-color: rgba(255, 255, 255, .08); }
 .dark .app-user-workspace .creation-empty-workspace > .creation-mode-capsule { background: #232326; border-color: rgba(255,255,255,.08); }
 .dark .app-user-workspace .creation-empty-workspace > .creation-mode-capsule .creation-chat-control[aria-selected="true"] { background: #303034; color: #ffffff; }
diff --git a/web/src/styles/workspace-product.css b/web/src/styles/workspace-product.css
index 735ff06ee..995d43f40 100644
--- a/web/src/styles/workspace-product.css
+++ b/web/src/styles/workspace-product.css
@@ -665,6 +665,157 @@
     .app-product-workspace .story-launcher-panel { padding: 16px; border-radius: 16px; }
 }
 
+/* Changelog Modal Styles */
+.app-changelog-modal .ant-modal-container {
+    display: flex;
+    flex-direction: column;
+    overflow: hidden;
+    border: 1px solid var(--user-border);
+    border-radius: 20px;
+    background: var(--user-page-bg);
+    box-shadow: 0 24px 70px rgba(0, 0, 0, 0.28);
+    max-height: min(84vh, 780px);
+}
+
+.app-changelog-modal .ant-modal-header {
+    margin-bottom: 0;
+    padding: 20px 24px 16px;
+    border-bottom: 1px solid var(--user-border);
+    background: var(--user-surface);
+}
+
+.app-changelog-heading {
+    display: flex;
+    align-items: center;
+    gap: 12px;
+    width: 100%;
+}
+
+.app-changelog-heading-icon {
+    display: grid;
+    width: 38px;
+    height: 38px;
+    flex: 0 0 38px;
+    place-items: center;
+    border-radius: 11px;
+    background: color-mix(in srgb, var(--user-accent) 14%, var(--user-surface));
+    color: var(--user-accent);
+}
+
+.app-changelog-heading-copy {
+    display: grid;
+    min-width: 0;
+    flex: 1 1 auto;
+    gap: 2px;
+}
+
+.app-changelog-heading-title {
+    color: var(--user-ink);
+    font-size: 16px;
+    font-weight: 650;
+    line-height: 1.3;
+}
+
+.app-changelog-heading-description {
+    color: var(--user-ink-muted);
+    font-size: 12px;
+    font-weight: 400;
+}
+
+.app-changelog-current-version {
+    margin-right: 28px;
+    border-radius: 999px;
+    border: 1px solid color-mix(in srgb, var(--user-accent) 25%, transparent);
+    background: color-mix(in srgb, var(--user-accent) 10%, var(--user-surface));
+    padding: 3px 10px;
+    color: var(--user-accent);
+    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
+    font-size: 11px;
+    font-weight: 600;
+    white-space: nowrap;
+}
+
+.app-changelog-scroll {
+    max-height: min(66vh, 600px);
+    overflow-y: auto;
+    padding: 20px 28px 32px;
+    color: var(--user-ink);
+}
+
+.app-changelog-section-heading {
+    display: flex;
+    align-items: center;
+    gap: 8px;
+    margin: 24px 0 12px;
+    padding-bottom: 6px;
+    border-bottom: 1px solid var(--user-border);
+    color: var(--user-ink);
+    font-size: 15px;
+    font-weight: 650;
+}
+
+.app-changelog-section-heading:first-child {
+    margin-top: 0;
+}
+
+.app-changelog-section-marker {
+    width: 6px;
+    height: 6px;
+    border-radius: 50%;
+    background: var(--user-ink-muted);
+}
+
+.app-changelog-section-heading.is-latest .app-changelog-section-marker {
+    background: var(--user-accent);
+}
+
+.app-changelog-latest-badge {
+    border-radius: 999px;
+    background: var(--user-accent);
+    padding: 1px 7px;
+    color: var(--user-accent-foreground, #fff);
+    font-size: 10px;
+    font-weight: 600;
+}
+
+.app-changelog-list {
+    margin: 8px 0 16px 20px;
+    padding: 0;
+    list-style-type: disc;
+    display: flex;
+    flex-direction: column;
+    gap: 8px;
+}
+
+.app-changelog-list li {
+    color: color-mix(in srgb, var(--user-ink) 88%, transparent);
+    font-size: 13px;
+    line-height: 1.65;
+}
+
+.app-changelog-paragraph {
+    margin: 6px 0;
+    color: color-mix(in srgb, var(--user-ink) 78%, transparent);
+    font-size: 13px;
+    line-height: 1.6;
+}
+
+.app-changelog-code {
+    border-radius: 5px;
+    border: 1px solid var(--user-border);
+    background: var(--user-surface-muted);
+    padding: 1px 5px;
+    color: var(--user-accent);
+    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
+    font-size: 11.5px;
+}
+
+@media (max-width: 620px) {
+    .app-changelog-heading-description { display: none; }
+    .app-changelog-current-version { display: none; }
+    .app-changelog-scroll { padding: 14px 16px 24px; }
+}
+
 @media (prefers-reduced-motion: reduce) {
     .app-product-workspace *,
     .app-product-overlays * { animation-duration: 1ms !important; animation-delay: 0ms !important; animation-iteration-count: 1 !important; transition-duration: 1ms !important; }