diff --git a/src/server/db/schemaContract.ts b/src/server/db/schemaContract.ts
index b241e84..00303a8 100644
--- a/src/server/db/schemaContract.ts
+++ b/src/server/db/schemaContract.ts
@@ -9,6 +9,8 @@ import {
   type LogicalColumnType,
 } from './schemaMetadata.js';
 
+export type { LogicalColumnType } from './schemaMetadata.js';
+
 export interface SchemaContractColumn {
   logicalType: LogicalColumnType;
   notNull: boolean;
diff --git a/src/server/proxy-core/surfaces/sharedSurface.ts b/src/server/proxy-core/surfaces/sharedSurface.ts
index f1f91b9..efad78b 100644
--- a/src/server/proxy-core/surfaces/sharedSurface.ts
+++ b/src/server/proxy-core/surfaces/sharedSurface.ts
@@ -59,8 +59,23 @@ type SurfaceOauthRefreshContext<TRequest extends BuiltEndpointRequest> = {
 };
 
 type SurfaceSuccessSelectedChannel = SurfaceSelectedChannel & {
-  account: Record<string, unknown> & { id: number };
-  site: Record<string, unknown>;
+  account: Record<string, unknown> & {
+    id: number;
+    username?: string | null;
+    accessToken?: string | null;
+    apiToken?: string | null;
+    extraConfig?: string | null;
+    platformUserId?: number | null;
+  };
+  site: Record<string, unknown> & {
+    id: number;
+    url: string;
+    platform: string;
+    apiKey?: string | null;
+    useSystemProxy?: boolean | null;
+    proxyUrl?: string | null;
+    name?: string | null;
+  };
   tokenValue: string;
   tokenName?: string | null;
 };
@@ -69,6 +84,18 @@ type SurfaceUsageSummary = {
   promptTokens: number;
   completionTokens: number;
   totalTokens: number;
+  cacheReadTokens: number;
+  cacheCreationTokens: number;
+  promptTokensIncludeCache: boolean | null;
+};
+
+type SurfaceResolvedUsageSummary = {
+  promptTokens: number;
+  completionTokens: number;
+  totalTokens: number;
+  recoveredFromSelfLog: boolean;
+  estimatedCostFromQuota: number;
+  selfLogBillingMeta: import('../../services/proxyUsageFallbackService.js').SelfLogBillingMeta | null;
 };
 
 export async function selectSurfaceChannelForAttempt(input: {
@@ -251,11 +278,18 @@ export async function recordSurfaceSuccess(input: {
   bestEffortMetrics?: {
     errorLabel: string;
   };
-}) {
-  let resolvedUsage = {
+}): Promise<{
+  resolvedUsage: SurfaceResolvedUsageSummary;
+  estimatedCost: number;
+  billingDetails: unknown;
+}> {
+  let resolvedUsage: SurfaceResolvedUsageSummary = {
     promptTokens: input.parsedUsage.promptTokens,
     completionTokens: input.parsedUsage.completionTokens,
     totalTokens: input.parsedUsage.totalTokens,
+    recoveredFromSelfLog: false,
+    estimatedCostFromQuota: 0,
+    selfLogBillingMeta: null,
   };
   let estimatedCost = 0;
   let billingDetails: unknown = null;
diff --git a/src/web/pages/ModelTester.tsx b/src/web/pages/ModelTester.tsx
index f3ae2d5..e017b27 100644
--- a/src/web/pages/ModelTester.tsx
+++ b/src/web/pages/ModelTester.tsx
@@ -53,6 +53,7 @@ import {
   isConversationUploadedFileSupported,
   resolveConversationFileCapability,
 } from './helpers/conversationFileCapabilities.js';
+import ConversationComposer from './model-tester/ConversationComposer.js';
 import DebugPanel from './model-tester/DebugPanel.js';
 import ModernSelect from '../components/ModernSelect.js';
 import { useAnimatedVisibility } from '../components/useAnimatedVisibility.js';
@@ -2859,163 +2860,25 @@ export default function ModelTester() {
             )}
 
             {inputs.mode === 'conversation' ? (
-              <div style={{ display: 'flex', gap: 10, alignItems: isMobile ? 'stretch' : 'flex-end', flexDirection: isMobile ? 'column' : 'row' }}>
-                <div style={{ flex: 1, display: 'flex', flexDirection: 'column', gap: 8 }}>
-                  <div style={{
-                    padding: '10px 12px',
-                    borderRadius: 'var(--radius-md)',
-                    border: '1px solid var(--color-border-light)',
-                    background: 'var(--color-bg-subtle)',
-                  }}>
-                    <input
-                      ref={conversationFileInputRef}
-                      type="file"
-                      multiple
-                      accept={conversationFileAccept}
-                      style={{ display: 'none' }}
-                      onChange={(event) => {
-                        void handleConversationFilesChange(event.target.files);
-                        event.target.value = '';
-                      }}
-                    />
-                    <div style={{ display: 'flex', gap: 8, alignItems: 'center', flexWrap: 'wrap' }}>
-                      <button
-                        type="button"
-                        className="btn btn-ghost"
-                        style={{ border: '1px solid var(--color-border)', padding: '6px 10px' }}
-                        disabled={sending || customRequestMode || !conversationFileSupported}
-                        onClick={() => conversationFileInputRef.current?.click()}
-                      >
-                        添加文件
-                      </button>
-                      <span style={{ fontSize: 11, color: 'var(--color-text-muted)' }}>
-                        {customRequestMode
-                          ? '自定义请求模式不会自动上传这些附件；关闭自定义模式后可走标准 /v1/files 链路。'
-                          : !conversationFileSupported
-                            ? (conversationFileCapability.reason || '当前协议暂不支持会话附件注入。')
-                            : conversationFileHint}
-                      </span>
-                    </div>
-                    {conversationFiles.length > 0 && (
-                      <div style={{ display: 'flex', gap: 8, flexWrap: 'wrap', marginTop: 10 }}>
-                        {conversationFiles.map((file) => {
-                          const statusText = file.status === 'uploading'
-                            ? '上传中'
-                            : file.status === 'uploaded'
-                              ? '已上传'
-                              : file.status === 'error'
-                                ? '失败'
-                                : '待上传';
-                          const statusColor = file.status === 'error'
-                            ? 'var(--color-danger)'
-                            : file.status === 'uploaded'
-                              ? 'var(--color-success)'
-                              : file.status === 'uploading'
-                                ? 'var(--color-warning)'
-                                : 'var(--color-text-muted)';
-
-                          return (
-                            <span
-                              key={file.localId}
-                              style={{
-                                display: 'inline-flex',
-                                alignItems: 'center',
-                                gap: 6,
-                                maxWidth: '100%',
-                                padding: '6px 10px',
-                                borderRadius: 999,
-                                border: '1px solid var(--color-border-light)',
-                                background: 'var(--color-bg-card)',
-                                fontSize: 11,
-                              }}
-                              title={file.errorMessage || file.fileId || file.name}
-                            >
-                              <span>📎</span>
-                              <span style={{ maxWidth: 220, overflow: 'hidden', textOverflow: 'ellipsis', whiteSpace: 'nowrap' }}>
-                                {file.name}
-                              </span>
-                              <span style={{ color: statusColor }}>· {statusText}</span>
-                              {!sending && (
-                                <button
-                                  type="button"
-                                  onClick={() => removeConversationFile(file.localId)}
-                                  style={{
-                                    border: 'none',
-                                    background: 'transparent',
-                                    color: 'var(--color-text-muted)',
-                                    cursor: 'pointer',
-                                    padding: 0,
-                                  }}
-                                >
-                                  ×
-                                </button>
-                              )}
-                            </span>
-                          );
-                        })}
-                      </div>
-                    )}
-                  </div>
-
-                  <textarea
-                    value={input}
-                    onChange={(event) => setInput(event.target.value)}
-                    onKeyDown={(event) => {
-                      if (event.key === 'Enter' && !event.shiftKey) {
-                        event.preventDefault();
-                        if (sending) {
-                          void stopGenerating();
-                          return;
-                        }
-                        void send();
-                      }
-                    }}
-                    placeholder={customRequestMode
-                      ? '自定义模式下输入可选。回车发送时将优先使用右侧自定义请求体。'
-                      : '输入提示词，或只上传文件后直接发送…（回车发送，Shift+回车换行）'}
-                    rows={3}
-                    style={{ ...inputBaseStyle, resize: 'none', flex: 1 }}
-                  />
-                </div>
-                <button
-                  onClick={() => {
-                    if (sending) {
-                      void stopGenerating();
-                      return;
-                    }
-                    void send();
-                  }}
-                  disabled={sending ? false : !canSend}
-                  className="btn btn-primary"
-                  style={{
-                    height: isMobile ? 50 : 78,
-                    padding: isMobile ? '0 16px' : '0 20px',
-                    fontSize: 14,
-                    fontWeight: 600,
-                    display: 'flex',
-                    flexDirection: isMobile ? 'row' : 'column',
-                    alignItems: 'center',
-                    justifyContent: 'center',
-                    gap: 4,
-                    minWidth: isMobile ? '100%' : 88,
-                    width: isMobile ? '100%' : 'auto',
-                  }}
-                >
-                  {sending ? (
-                    <>
-                      <span style={{ fontSize: 18, lineHeight: 1 }}>■</span>
-                      <span style={{ fontSize: 11 }}>停止</span>
-                    </>
-                  ) : (
-                    <>
-                      <svg width="18" height="18" fill="none" viewBox="0 0 24 24" stroke="currentColor">
-                        <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M12 19l9 2-9-18-9 18 9-2zm0 0v-8" />
-                      </svg>
-                      <span style={{ fontSize: 11 }}>发送</span>
-                    </>
-                  )}
-                </button>
-              </div>
+              <ConversationComposer
+                isMobile={isMobile}
+                sending={sending}
+                customRequestMode={customRequestMode}
+                conversationFileCapability={conversationFileCapability}
+                conversationFileSupported={conversationFileSupported}
+                conversationFileAccept={conversationFileAccept}
+                conversationFileHint={conversationFileHint}
+                conversationFiles={conversationFiles}
+                conversationFileInputRef={conversationFileInputRef}
+                input={input}
+                canSend={canSend}
+                inputBaseStyle={inputBaseStyle}
+                onInputChange={setInput}
+                onFilesChange={handleConversationFilesChange}
+                onRemoveConversationFile={removeConversationFile}
+                onSend={send}
+                onStop={stopGenerating}
+              />
             ) : (
               <div style={{ display: 'flex', flexDirection: 'column', gap: 10 }}>
                 {inputs.mode === 'embeddings' && (
diff --git a/src/web/pages/model-tester/ConversationComposer.tsx b/src/web/pages/model-tester/ConversationComposer.tsx
new file mode 100644
index 0000000..86ca20b
--- /dev/null
+++ b/src/web/pages/model-tester/ConversationComposer.tsx
@@ -0,0 +1,207 @@
+import React from 'react';
+import type { ConversationDraftFile } from '../helpers/modelTesterSession.js';
+
+type ConversationCapability = {
+  supported: boolean;
+  reason?: string | null;
+};
+
+type ConversationComposerProps = {
+  isMobile: boolean;
+  sending: boolean;
+  customRequestMode: boolean;
+  conversationFileCapability: ConversationCapability;
+  conversationFileSupported: boolean;
+  conversationFileAccept: string;
+  conversationFileHint: string;
+  conversationFiles: ConversationDraftFile[];
+  conversationFileInputRef: React.RefObject<HTMLInputElement>;
+  input: string;
+  canSend: boolean;
+  inputBaseStyle: React.CSSProperties;
+  onInputChange: (value: string) => void;
+  onFilesChange: (fileList: FileList | null) => Promise<void> | void;
+  onRemoveConversationFile: (localId: string) => void;
+  onSend: () => Promise<void> | void;
+  onStop: () => Promise<void> | void;
+};
+
+export default function ConversationComposer({
+  isMobile,
+  sending,
+  customRequestMode,
+  conversationFileCapability,
+  conversationFileSupported,
+  conversationFileAccept,
+  conversationFileHint,
+  conversationFiles,
+  conversationFileInputRef,
+  input,
+  canSend,
+  inputBaseStyle,
+  onInputChange,
+  onFilesChange,
+  onRemoveConversationFile,
+  onSend,
+  onStop,
+}: ConversationComposerProps) {
+  return (
+    <div style={{ display: 'flex', gap: 10, alignItems: isMobile ? 'stretch' : 'flex-end', flexDirection: isMobile ? 'column' : 'row' }}>
+      <div style={{ flex: 1, display: 'flex', flexDirection: 'column', gap: 8 }}>
+        <div style={{
+          padding: '10px 12px',
+          borderRadius: 'var(--radius-md)',
+          border: '1px solid var(--color-border-light)',
+          background: 'var(--color-bg-subtle)',
+        }}>
+          <input
+            ref={conversationFileInputRef}
+            type="file"
+            multiple
+            accept={conversationFileAccept}
+            style={{ display: 'none' }}
+            onChange={(event) => {
+              void onFilesChange(event.target.files);
+              event.target.value = '';
+            }}
+          />
+          <div style={{ display: 'flex', gap: 8, alignItems: 'center', flexWrap: 'wrap' }}>
+            <button
+              type="button"
+              className="btn btn-ghost"
+              style={{ border: '1px solid var(--color-border)', padding: '6px 10px' }}
+              disabled={sending || customRequestMode || !conversationFileSupported}
+              onClick={() => conversationFileInputRef.current?.click()}
+            >
+              添加文件
+            </button>
+            <span style={{ fontSize: 11, color: 'var(--color-text-muted)' }}>
+              {customRequestMode
+                ? '自定义请求模式不会自动上传这些附件；关闭自定义模式后可走标准 /v1/files 链路。'
+                : !conversationFileSupported
+                  ? (conversationFileCapability.reason || '当前协议暂不支持会话附件注入。')
+                  : conversationFileHint}
+            </span>
+          </div>
+          {conversationFiles.length > 0 ? (
+            <div style={{ display: 'flex', gap: 8, flexWrap: 'wrap', marginTop: 10 }}>
+              {conversationFiles.map((file) => {
+                const statusText = file.status === 'uploading'
+                  ? '上传中'
+                  : file.status === 'uploaded'
+                    ? '已上传'
+                    : file.status === 'error'
+                      ? '失败'
+                      : '待上传';
+                const statusColor = file.status === 'error'
+                  ? 'var(--color-danger)'
+                  : file.status === 'uploaded'
+                    ? 'var(--color-success)'
+                    : file.status === 'uploading'
+                      ? 'var(--color-warning)'
+                      : 'var(--color-text-muted)';
+
+                return (
+                  <span
+                    key={file.localId}
+                    style={{
+                      display: 'inline-flex',
+                      alignItems: 'center',
+                      gap: 6,
+                      maxWidth: '100%',
+                      padding: '6px 10px',
+                      borderRadius: 999,
+                      border: '1px solid var(--color-border-light)',
+                      background: 'var(--color-bg-card)',
+                      fontSize: 11,
+                    }}
+                    title={file.errorMessage || file.fileId || file.name}
+                  >
+                    <span>📎</span>
+                    <span style={{ maxWidth: 220, overflow: 'hidden', textOverflow: 'ellipsis', whiteSpace: 'nowrap' }}>
+                      {file.name}
+                    </span>
+                    <span style={{ color: statusColor }}>· {statusText}</span>
+                    {!sending ? (
+                      <button
+                        type="button"
+                        onClick={() => onRemoveConversationFile(file.localId)}
+                        style={{
+                          border: 'none',
+                          background: 'transparent',
+                          color: 'var(--color-text-muted)',
+                          cursor: 'pointer',
+                          padding: 0,
+                        }}
+                      >
+                        ×
+                      </button>
+                    ) : null}
+                  </span>
+                );
+              })}
+            </div>
+          ) : null}
+        </div>
+
+        <textarea
+          value={input}
+          onChange={(event) => onInputChange(event.target.value)}
+          onKeyDown={(event) => {
+            if (event.key === 'Enter' && !event.shiftKey) {
+              event.preventDefault();
+              if (sending) {
+                void onStop();
+                return;
+              }
+              void onSend();
+            }
+          }}
+          placeholder={customRequestMode
+            ? '自定义模式下输入可选。回车发送时将优先使用右侧自定义请求体。'
+            : '输入提示词，或只上传文件后直接发送…（回车发送，Shift+回车换行）'}
+          rows={3}
+          style={{ ...inputBaseStyle, resize: 'none', flex: 1 }}
+        />
+      </div>
+      <button
+        onClick={() => {
+          if (sending) {
+            void onStop();
+            return;
+          }
+          void onSend();
+        }}
+        disabled={sending ? false : !canSend}
+        className="btn btn-primary"
+        style={{
+          height: isMobile ? 50 : 78,
+          padding: isMobile ? '0 16px' : '0 20px',
+          fontSize: 14,
+          fontWeight: 600,
+          display: 'flex',
+          flexDirection: isMobile ? 'row' : 'column',
+          alignItems: 'center',
+          justifyContent: 'center',
+          gap: 4,
+          minWidth: isMobile ? '100%' : 88,
+          width: isMobile ? '100%' : 'auto',
+        }}
+      >
+        {sending ? (
+          <>
+            <span style={{ fontSize: 18, lineHeight: 1 }}>■</span>
+            <span style={{ fontSize: 11 }}>停止</span>
+          </>
+        ) : (
+          <>
+            <svg width="18" height="18" fill="none" viewBox="0 0 24 24" stroke="currentColor">
+              <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M12 19l9 2-9-18-9 18 9-2zm0 0v-8" />
+            </svg>
+            <span style={{ fontSize: 11 }}>发送</span>
+          </>
+        )}
+      </button>
+    </div>
+  );
+}
diff --git a/src/web/pages/modelTester.conversation-composer.architecture.test.tsx b/src/web/pages/modelTester.conversation-composer.architecture.test.tsx
new file mode 100644
index 0000000..120b6d0
--- /dev/null
+++ b/src/web/pages/modelTester.conversation-composer.architecture.test.tsx
@@ -0,0 +1,12 @@
+import { describe, expect, it } from 'vitest';
+import { readFileSync } from 'node:fs';
+import { resolve } from 'node:path';
+
+describe('ModelTester conversation composer extraction', () => {
+  it('delegates the conversation attachment and send composer to a dedicated model-tester component', () => {
+    const source = readFileSync(resolve(process.cwd(), 'src/web/pages/ModelTester.tsx'), 'utf8').replace(/\r\n/g, '\n');
+
+    expect(source).toContain("import ConversationComposer from './model-tester/ConversationComposer.js'");
+    expect(source).not.toContain('添加文件');
+  });
+});