feat: customize model provider requests

Model connections can now save bounded JSON request headers and top-level body fields. Direct requests and Continue support both; local OpenCode and DeepSeek Harness use only native header support, while the managed remote OpenCode gateway applies both.

Runtime, protocol, and authentication fields keep precedence. Custom values are ordinary connection settings, not credential storage. This migrates Runtime settings from v20 to v21 and updates the DeepSeek control and managed Runtime ACP capabilities.

Release note: 模型连接详情新增自定义请求头和请求体；直连与 Continue 支持两者，本地 OpenCode 和 DeepSeek Harness 仅应用原生支持的请求头，受管远程 OpenCode 支持两者，界面会明确提示生效范围。

src/main/runtime-settings-store.test.ts

@@ -99,6 +99,108 @@ describe('RuntimeSettingsStore', () => {
     })
   })
 
+  it('migrates version 20 model profiles with empty request customization', async () => {
+    const { filePath, store } = await createStore()
+    await store.update(settings())
+    const version20 = JSON.parse(
+      await readFile(filePath, 'utf8')
+    ) as {
+      version: number
+      modelProfiles: Array<Record<string, unknown>>
+    }
+    version20.version = 20
+    for (const profile of version20.modelProfiles) {
+      delete profile.requestHeaders
+      delete profile.requestBody
+    }
+    await writeFile(filePath, JSON.stringify(version20), 'utf8')
+
+    const migrated = new RuntimeSettingsStore(filePath, cipher, {})
+    await expect(migrated.getPublicSettings()).resolves.toMatchObject({
+      modelProfiles: [
+        expect.objectContaining({
+          requestHeaders: {},
+          requestBody: {}
+        })
+      ]
+    })
+    await expect(migrated.getResolvedSettings()).resolves.toMatchObject({
+      modelProfiles: [
+        expect.objectContaining({
+          requestHeaders: {},
+          requestBody: {}
+        })
+      ]
+    })
+  })
+
+  it('round-trips model request headers and body without treating them as credentials', async () => {
+    const { filePath, store } = await createStore()
+    const profileId = '00000000-0000-4000-8000-000000000010'
+    const updated = await store.update(
+      settings({
+        modelProfiles: [
+          {
+            id: profileId,
+            name: 'Customized model',
+            baseUrl: 'https://provider.example/v1',
+            modelName: 'model-1',
+            protocol: 'openai-responses',
+            authentication: 'none',
+            supportsImageInput: false,
+            imageGenerationQuality: 'auto',
+            requestHeaders: {
+              'x-tenant-id': 'tenant-a'
+            },
+            requestBody: {
+              temperature: 0.2,
+              metadata: { source: 'goodbuddy' }
+            },
+            apiKey: { action: 'keep' }
+          }
+        ],
+        defaultModelProfileId: profileId,
+        opencodeModelSource: { kind: 'profile', profileId },
+        continueModelSource: { kind: 'profile', profileId }
+      })
+    )
+
+    expect(updated.modelProfiles[0]).toMatchObject({
+      requestHeaders: {
+        'x-tenant-id': 'tenant-a'
+      },
+      requestBody: {
+        temperature: 0.2,
+        metadata: { source: 'goodbuddy' }
+      },
+      apiKeyConfigured: false
+    })
+    await expect(store.getResolvedSettings()).resolves.toMatchObject({
+      modelProfiles: [
+        expect.objectContaining({
+          requestHeaders: {
+            'x-tenant-id': 'tenant-a'
+          },
+          requestBody: {
+            temperature: 0.2,
+            metadata: { source: 'goodbuddy' }
+          },
+          apiKey: undefined
+        })
+      ]
+    })
+    const persisted = JSON.parse(await readFile(filePath, 'utf8')) as {
+      version: number
+      modelProfiles: Array<Record<string, unknown>>
+    }
+    expect(persisted.version).toBe(21)
+    expect(persisted.modelProfiles[0]).toMatchObject({
+      requestHeaders: { 'x-tenant-id': 'tenant-a' },
+      requestBody: { temperature: 0.2 }
+    })
+    expect(persisted.modelProfiles[0]).not.toHaveProperty('apiKey')
+  })
+
   it('replaces only the untouched legacy BigToken seed', async () => {
     const { filePath, store } = await createStore()
     await store.update(settings())
@@ -619,7 +721,7 @@ describe('RuntimeSettingsStore', () => {
     const persisted = JSON.parse(
       await readFile(filePath, 'utf8')
     ) as Record<string, unknown>
-    expect(persisted.version).toBe(20)
+    expect(persisted.version).toBe(21)
     expect(persisted).not.toHaveProperty(
       'deepseekHarnessBinaryPath'
     )
@@ -898,7 +1000,7 @@ describe('RuntimeSettingsStore', () => {
     const persisted = JSON.parse(await readFile(filePath, 'utf8')) as {
       version: number
     }
-    expect(persisted.version).toBe(20)
+    expect(persisted.version).toBe(21)
   })
 
   it('migrates version 11 and removes the obsolete intranet toggle', async () => {
@@ -918,7 +1020,7 @@ describe('RuntimeSettingsStore', () => {
       version: number
       intranetCompatibilityEnabled?: boolean
     }
-    expect(persisted.version).toBe(20)
+    expect(persisted.version).toBe(21)
     expect(persisted).not.toHaveProperty('intranetCompatibilityEnabled')
   })
 
@@ -1196,7 +1298,7 @@ describe('RuntimeSettingsStore', () => {
       (JSON.parse(await readFile(filePath, 'utf8')) as {
         version: number
       }).version
-    ).toBe(20)
+    ).toBe(21)
   })
 
   it('migrates version 13 with reranking disabled by default', async () => {
@@ -1703,7 +1805,7 @@ describe('RuntimeSettingsStore', () => {
       version: number
       modelProfiles: Array<Record<string, unknown>>
     }
-    expect(persisted.version).toBe(20)
+    expect(persisted.version).toBe(21)
     expect(persisted.modelProfiles).toContainEqual(
       expect.objectContaining({
         id: imageId,
@@ -2005,7 +2107,7 @@ describe('RuntimeSettingsStore', () => {
       unknown
     >
     expect(saved).toMatchObject({
-      version: 20,
+      version: 21,
       provider: 'model',
       continueBinaryPath: '',
       continueMode: 'chat',
@@ -2284,7 +2386,7 @@ describe('RuntimeSettingsStore', () => {
       version: number
       modelProfiles: Array<Record<string, unknown>>
     }
-    expect(persisted.version).toBe(20)
+    expect(persisted.version).toBe(21)
     expect(persisted.modelProfiles[0]).not.toHaveProperty('credential')
   })