Merge pull request #1455 from touwaeriol/feat/channel-management

feat(channel): add channel management with multi-mode pricing and billing integration

backend/internal/service/openai_model_mapping.go

 package service
 
-import "strings"
-
-// resolveOpenAIForwardModel resolves the account/group mapping result for
-// OpenAI-compatible forwarding. Group-level default mapping only applies when
-// the account itself did not match any explicit model_mapping rule.
+// resolveOpenAIForwardModel determines the upstream model for OpenAI-compatible
+// forwarding. Group-level default mapping only applies when the account itself
+// did not match any explicit model_mapping rule.
 func resolveOpenAIForwardModel(account *Account, requestedModel, defaultMappedModel string) string {
 	if account == nil {
 		if defaultMappedModel != "" {
@@ -19,23 +17,3 @@ func resolveOpenAIForwardModel(account *Account, requestedModel, defaultMappedMo
 	}
 	return mappedModel
 }
-
-func resolveOpenAIUpstreamModel(model string) string {
-	if isBareGPT53CodexSparkModel(model) {
-		return "gpt-5.3-codex-spark"
-	}
-	return normalizeCodexModel(strings.TrimSpace(model))
-}
-
-func isBareGPT53CodexSparkModel(model string) bool {
-	modelID := strings.TrimSpace(model)
-	if modelID == "" {
-		return false
-	}
-	if strings.Contains(modelID, "/") {
-		parts := strings.Split(modelID, "/")
-		modelID = parts[len(parts)-1]
-	}
-	normalized := strings.ToLower(strings.TrimSpace(modelID))
-	return normalized == "gpt-5.3-codex-spark" || normalized == "gpt 5.3 codex spark"
-}

backend/internal/service/openai_model_mapping_test.go

@@ -74,30 +74,28 @@ func TestResolveOpenAIForwardModel_PreventsClaudeModelFromFallingBackToGpt51(t *
 		Credentials: map[string]any{},
 	}
 
-	withoutDefault := resolveOpenAIUpstreamModel(resolveOpenAIForwardModel(account, "claude-opus-4-6", ""))
+	withoutDefault := normalizeCodexModel(resolveOpenAIForwardModel(account, "claude-opus-4-6", ""))
 	if withoutDefault != "gpt-5.1" {
-		t.Fatalf("resolveOpenAIUpstreamModel(...) = %q, want %q", withoutDefault, "gpt-5.1")
+		t.Fatalf("normalizeCodexModel(...) = %q, want %q", withoutDefault, "gpt-5.1")
 	}
 
-	withDefault := resolveOpenAIUpstreamModel(resolveOpenAIForwardModel(account, "claude-opus-4-6", "gpt-5.4"))
+	withDefault := normalizeCodexModel(resolveOpenAIForwardModel(account, "claude-opus-4-6", "gpt-5.4"))
 	if withDefault != "gpt-5.4" {
-		t.Fatalf("resolveOpenAIUpstreamModel(...) = %q, want %q", withDefault, "gpt-5.4")
+		t.Fatalf("normalizeCodexModel(...) = %q, want %q", withDefault, "gpt-5.4")
 	}
 }
 
-func TestResolveOpenAIUpstreamModel(t *testing.T) {
+func TestNormalizeCodexModel(t *testing.T) {
 	cases := map[string]string{
-		"gpt-5.3-codex-spark":          "gpt-5.3-codex-spark",
-		"gpt 5.3 codex spark":          "gpt-5.3-codex-spark",
-		" openai/gpt-5.3-codex-spark ": "gpt-5.3-codex-spark",
+		"gpt-5.3-codex-spark":       "gpt-5.3-codex",
 		"gpt-5.3-codex-spark-high":  "gpt-5.3-codex",
 		"gpt-5.3-codex-spark-xhigh": "gpt-5.3-codex",
 		"gpt-5.3":                   "gpt-5.3-codex",
 	}
 
 	for input, expected := range cases {
-		if got := resolveOpenAIUpstreamModel(input); got != expected {
-			t.Fatalf("resolveOpenAIUpstreamModel(%q) = %q, want %q", input, got, expected)
+		if got := normalizeCodexModel(input); got != expected {
+			t.Fatalf("normalizeCodexModel(%q) = %q, want %q", input, got, expected)
 		}
 	}
 }

backend/internal/service/openai_ws_forwarder.go

@@ -2515,7 +2515,7 @@ func (s *OpenAIGatewayService) ProxyResponsesWebSocketFromClient(
 			}
 			normalized = next
 		}
-		upstreamModel := resolveOpenAIUpstreamModel(account.GetMappedModel(originalModel))
+		upstreamModel := normalizeCodexModel(account.GetMappedModel(originalModel))
 		if upstreamModel != originalModel {
 			next, setErr := applyPayloadMutation(normalized, "model", upstreamModel)
 			if setErr != nil {
@@ -2773,7 +2773,7 @@ func (s *OpenAIGatewayService) ProxyResponsesWebSocketFromClient(
 		mappedModel := ""
 		var mappedModelBytes []byte
 		if originalModel != "" {
-			mappedModel = resolveOpenAIUpstreamModel(account.GetMappedModel(originalModel))
+			mappedModel = normalizeCodexModel(account.GetMappedModel(originalModel))
 			needModelReplace = mappedModel != "" && mappedModel != originalModel
 			if needModelReplace {
 				mappedModelBytes = []byte(mappedModel)

backend/internal/service/openai_ws_protocol_forward_test.go

@@ -615,6 +615,8 @@ func TestNewOpenAIGatewayService_InitializesOpenAIWSResolver(t *testing.T) {
 		nil,
 		nil,
 		nil,
+		nil,
+		nil,
 	)
 
 	decision := svc.getOpenAIWSProtocolResolver().Resolve(nil)

backend/internal/service/ops_retry.go

@@ -519,7 +519,7 @@ func (s *OpsService) selectAccountForRetry(ctx context.Context, reqType opsRetry
 		if s.gatewayService == nil {
 			return nil, fmt.Errorf("gateway service not available")
 		}
-		return s.gatewayService.SelectAccountWithLoadAwareness(ctx, groupID, "", model, excludedIDs, "") // 重试不使用会话限制
+		return s.gatewayService.SelectAccountWithLoadAwareness(ctx, groupID, "", model, excludedIDs, "", int64(0)) // 重试不使用会话限制
 	default:
 		return nil, fmt.Errorf("unsupported retry type: %s", reqType)
 	}

backend/internal/service/pricing_service.go

@@ -71,6 +71,7 @@ type LiteLLMModelPricing struct {
 	Mode                                string  `json:"mode"`
 	SupportsPromptCaching               bool    `json:"supports_prompt_caching"`
 	OutputCostPerImage                  float64 `json:"output_cost_per_image"`       // 图片生成模型每张图片价格
+	OutputCostPerImageToken             float64 `json:"output_cost_per_image_token"` // 图片输出 token 价格
 }
 
 // PricingRemoteClient 远程价格数据获取接口
@@ -94,6 +95,7 @@ type LiteLLMRawEntry struct {
 	Mode                                string   `json:"mode"`
 	SupportsPromptCaching               bool     `json:"supports_prompt_caching"`
 	OutputCostPerImage                  *float64 `json:"output_cost_per_image"`
+	OutputCostPerImageToken             *float64 `json:"output_cost_per_image_token"`
 }
 
 // PricingService 动态价格服务
@@ -408,6 +410,9 @@ func (s *PricingService) parsePricingData(body []byte) (map[string]*LiteLLMModel
 		if entry.OutputCostPerImage != nil {
 			pricing.OutputCostPerImage = *entry.OutputCostPerImage
 		}
+		if entry.OutputCostPerImageToken != nil {
+			pricing.OutputCostPerImageToken = *entry.OutputCostPerImageToken
+		}
 
 		result[modelName] = pricing
 	}

backend/internal/service/testhelpers_test.go

+//go:build unit
+
+package service
+
+// testPtrFloat64 returns a pointer to the given float64 value.
+func testPtrFloat64(v float64) *float64 { return &v }
+
+// testPtrInt returns a pointer to the given int value.
+func testPtrInt(v int) *int { return &v }
+
+// testPtrString returns a pointer to the given string value.
+func testPtrString(v string) *string { return &v }
+
+// testPtrBool returns a pointer to the given bool value.
+func testPtrBool(v bool) *bool { return &v }

backend/internal/service/usage_log.go

@@ -104,6 +104,14 @@ type UsageLog struct {
 	// UpstreamModel is the actual model sent to the upstream provider after mapping.
 	// Nil means no mapping was applied (requested model was used as-is).
 	UpstreamModel *string
+	// ChannelID 渠道 ID
+	ChannelID *int64
+	// ModelMappingChain 模型映射链，如 "a→b→c"
+	ModelMappingChain *string
+	// BillingTier 计费层级标签（per_request/image 模式）
+	BillingTier *string
+	// BillingMode 计费模式：token/image（sora 路径为 nil）
+	BillingMode *string
 	// ServiceTier records the OpenAI service tier used for billing, e.g. "priority" / "flex".
 	ServiceTier *string
 	// ReasoningEffort is the request's reasoning effort level.
@@ -126,6 +134,9 @@ type UsageLog struct {
 	CacheCreation5mTokens int `gorm:"column:cache_creation_5m_tokens"`
 	CacheCreation1hTokens int `gorm:"column:cache_creation_1h_tokens"`
 
+	ImageOutputTokens int
+	ImageOutputCost   float64
+
 	InputCost         float64
 	OutputCost        float64
 	CacheCreationCost float64

backend/internal/service/usage_log_helpers.go

@@ -26,3 +26,10 @@ func forwardResultBillingModel(requestedModel, upstreamModel string) string {
 	}
 	return strings.TrimSpace(upstreamModel)
 }
+
+func optionalInt64Ptr(v int64) *int64 {
+	if v == 0 {
+		return nil
+	}
+	return &v
+}

backend/internal/service/wire.go

@@ -490,4 +490,6 @@ var ProviderSet = wire.NewSet(
 	ProvideScheduledTestService,
 	ProvideScheduledTestRunnerService,
 	NewGroupCapacityService,
+	NewChannelService,
+	NewModelPricingResolver,
 )

backend/migrations/081_create_channels.sql

+-- Create channels table for managing pricing channels.
+-- A channel groups multiple groups together and provides custom model pricing.
+
+SET LOCAL lock_timeout = '5s';
+SET LOCAL statement_timeout = '10min';
+
+-- 渠道表
+CREATE TABLE IF NOT EXISTS channels (
+    id          BIGSERIAL    PRIMARY KEY,
+    name        VARCHAR(100) NOT NULL,
+    description TEXT         DEFAULT '',
+    status      VARCHAR(20)  NOT NULL DEFAULT 'active',
+    created_at  TIMESTAMPTZ  NOT NULL DEFAULT NOW(),
+    updated_at  TIMESTAMPTZ  NOT NULL DEFAULT NOW()
+);
+
+-- 渠道名称唯一索引
+CREATE UNIQUE INDEX IF NOT EXISTS idx_channels_name ON channels (name);
+CREATE INDEX IF NOT EXISTS idx_channels_status ON channels (status);
+
+-- 渠道-分组关联表（每个分组只能属于一个渠道）
+CREATE TABLE IF NOT EXISTS channel_groups (
+    id          BIGSERIAL    PRIMARY KEY,
+    channel_id  BIGINT       NOT NULL REFERENCES channels(id) ON DELETE CASCADE,
+    group_id    BIGINT       NOT NULL REFERENCES groups(id) ON DELETE CASCADE,
+    created_at  TIMESTAMPTZ  NOT NULL DEFAULT NOW()
+);
+
+CREATE UNIQUE INDEX IF NOT EXISTS idx_channel_groups_group_id ON channel_groups (group_id);
+CREATE INDEX IF NOT EXISTS idx_channel_groups_channel_id ON channel_groups (channel_id);
+
+-- 渠道模型定价表（一条定价可绑定多个模型）
+CREATE TABLE IF NOT EXISTS channel_model_pricing (
+    id                 BIGSERIAL      PRIMARY KEY,
+    channel_id         BIGINT         NOT NULL REFERENCES channels(id) ON DELETE CASCADE,
+    models             JSONB          NOT NULL DEFAULT '[]',
+    input_price        NUMERIC(20,12),
+    output_price       NUMERIC(20,12),
+    cache_write_price  NUMERIC(20,12),
+    cache_read_price   NUMERIC(20,12),
+    image_output_price NUMERIC(20,8),
+    created_at         TIMESTAMPTZ    NOT NULL DEFAULT NOW(),
+    updated_at         TIMESTAMPTZ    NOT NULL DEFAULT NOW()
+);
+
+CREATE INDEX IF NOT EXISTS idx_channel_model_pricing_channel_id ON channel_model_pricing (channel_id);
+
+COMMENT ON TABLE channels IS '渠道管理：关联多个分组，提供自定义模型定价';
+COMMENT ON TABLE channel_groups IS '渠道-分组关联表：每个分组最多属于一个渠道';
+COMMENT ON TABLE channel_model_pricing IS '渠道模型定价：一条定价可绑定多个模型，价格一致';
+COMMENT ON COLUMN channel_model_pricing.models IS '绑定的模型列表，JSON 数组，如 ["claude-opus-4-6","claude-opus-4-6-thinking"]';
+COMMENT ON COLUMN channel_model_pricing.input_price IS '每 token 输入价格（USD），NULL 表示使用默认';
+COMMENT ON COLUMN channel_model_pricing.output_price IS '每 token 输出价格（USD），NULL 表示使用默认';
+COMMENT ON COLUMN channel_model_pricing.cache_write_price IS '缓存写入每 token 价格，NULL 表示使用默认';
+COMMENT ON COLUMN channel_model_pricing.cache_read_price IS '缓存读取每 token 价格，NULL 表示使用默认';
+COMMENT ON COLUMN channel_model_pricing.image_output_price IS '图片输出价格（Gemini Image 等），NULL 表示使用默认';

backend/migrations/082_refactor_channel_pricing.sql

+-- Extend channel_model_pricing with billing_mode and add context-interval child table.
+-- Supports three billing modes: token (per-token with context intervals),
+-- per_request (per-request with context-size tiers), and image (per-image).
+
+SET LOCAL lock_timeout = '5s';
+SET LOCAL statement_timeout = '10min';
+
+-- 1. 为 channel_model_pricing 添加 billing_mode 列
+ALTER TABLE channel_model_pricing
+    ADD COLUMN IF NOT EXISTS billing_mode VARCHAR(20) NOT NULL DEFAULT 'token';
+
+COMMENT ON COLUMN channel_model_pricing.billing_mode IS '计费模式：token（按 token 区间计费）、per_request（按次计费）、image（图片计费）';
+
+-- 2. 创建区间定价子表
+CREATE TABLE IF NOT EXISTS channel_pricing_intervals (
+    id                BIGSERIAL      PRIMARY KEY,
+    pricing_id        BIGINT         NOT NULL REFERENCES channel_model_pricing(id) ON DELETE CASCADE,
+    min_tokens        INT            NOT NULL DEFAULT 0,
+    max_tokens        INT,
+    tier_label        VARCHAR(50),
+    input_price       NUMERIC(20,12),
+    output_price      NUMERIC(20,12),
+    cache_write_price NUMERIC(20,12),
+    cache_read_price  NUMERIC(20,12),
+    per_request_price NUMERIC(20,12),
+    sort_order        INT            NOT NULL DEFAULT 0,
+    created_at        TIMESTAMPTZ    NOT NULL DEFAULT NOW(),
+    updated_at        TIMESTAMPTZ    NOT NULL DEFAULT NOW()
+);
+
+CREATE INDEX IF NOT EXISTS idx_channel_pricing_intervals_pricing_id
+    ON channel_pricing_intervals (pricing_id);
+
+COMMENT ON TABLE channel_pricing_intervals IS '渠道定价区间：支持按 token 区间、按次分层、图片分辨率分层';
+COMMENT ON COLUMN channel_pricing_intervals.min_tokens IS '区间下界（含），token 模式使用';
+COMMENT ON COLUMN channel_pricing_intervals.max_tokens IS '区间上界（不含），NULL 表示无上限';
+COMMENT ON COLUMN channel_pricing_intervals.tier_label IS '层级标签，按次/图片模式使用（如 1K、2K、4K、HD）';
+COMMENT ON COLUMN channel_pricing_intervals.input_price IS 'token 模式：每 token 输入价';
+COMMENT ON COLUMN channel_pricing_intervals.output_price IS 'token 模式：每 token 输出价';
+COMMENT ON COLUMN channel_pricing_intervals.cache_write_price IS 'token 模式：缓存写入价';
+COMMENT ON COLUMN channel_pricing_intervals.cache_read_price IS 'token 模式：缓存读取价';
+COMMENT ON COLUMN channel_pricing_intervals.per_request_price IS '按次/图片模式：每次请求价格';
+
+-- 3. 迁移现有 flat 定价为单区间 [0, +inf)
+-- 仅迁移有明确定价（至少一个价格字段非 NULL）的条目
+INSERT INTO channel_pricing_intervals (pricing_id, min_tokens, max_tokens, input_price, output_price, cache_write_price, cache_read_price, sort_order)
+SELECT
+    cmp.id,
+    0,
+    NULL,
+    cmp.input_price,
+    cmp.output_price,
+    cmp.cache_write_price,
+    cmp.cache_read_price,
+    0
+FROM channel_model_pricing cmp
+WHERE cmp.billing_mode = 'token'
+  AND (cmp.input_price IS NOT NULL OR cmp.output_price IS NOT NULL
+       OR cmp.cache_write_price IS NOT NULL OR cmp.cache_read_price IS NOT NULL)
+  AND NOT EXISTS (
+      SELECT 1 FROM channel_pricing_intervals cpi WHERE cpi.pricing_id = cmp.id
+  );
+
+-- 4. 迁移 image_output_price 为 image 模式的区间条目
+-- 将有 image_output_price 的现有条目复制为 billing_mode='image' 的独立条目
+-- 注意：这里不改变原条目的 billing_mode，而是将 image_output_price 作为向后兼容字段保留
+-- 实际的 image 计费在未来由独立的 billing_mode='image' 条目处理

backend/migrations/083_channel_model_mapping.sql

+SET LOCAL lock_timeout = '5s';
+SET LOCAL statement_timeout = '10min';
+
+ALTER TABLE channels ADD COLUMN IF NOT EXISTS model_mapping JSONB DEFAULT '{}';
+COMMENT ON COLUMN channels.model_mapping IS '渠道级模型映射，在账号映射之前执行。格式：{"source_model": "target_model"}';

backend/migrations/084_channel_billing_model_source.sql

+-- Add billing_model_source to channels (controls whether billing uses requested or upstream model)
+ALTER TABLE channels ADD COLUMN IF NOT EXISTS billing_model_source VARCHAR(20) DEFAULT 'requested';
+
+-- Add channel tracking fields to usage_logs
+ALTER TABLE usage_logs ADD COLUMN IF NOT EXISTS channel_id BIGINT;
+ALTER TABLE usage_logs ADD COLUMN IF NOT EXISTS model_mapping_chain VARCHAR(500);
+ALTER TABLE usage_logs ADD COLUMN IF NOT EXISTS billing_tier VARCHAR(50);

backend/migrations/085_channel_restrict_and_per_request_price.sql

+-- Add model restriction switch to channels
+ALTER TABLE channels ADD COLUMN IF NOT EXISTS restrict_models BOOLEAN DEFAULT false;
+
+-- Add default per_request_price to channel_model_pricing (fallback when no tier matches)
+ALTER TABLE channel_model_pricing ADD COLUMN IF NOT EXISTS per_request_price NUMERIC(20,10);

backend/migrations/086_channel_platform_pricing.sql

+-- 086_channel_platform_pricing.sql
+-- 渠道按平台维度：model_pricing 加 platform 列，model_mapping 改为嵌套格式
+
+-- 1. channel_model_pricing 加 platform 列
+ALTER TABLE channel_model_pricing
+    ADD COLUMN IF NOT EXISTS platform VARCHAR(50) NOT NULL DEFAULT 'anthropic';
+
+CREATE INDEX IF NOT EXISTS idx_channel_model_pricing_platform
+    ON channel_model_pricing (platform);
+
+-- 2. model_mapping: 从扁平 {"src":"dst"} 迁移为嵌套 {"anthropic":{"src":"dst"}}
+-- 仅迁移非空、非 '{}' 的旧格式数据（通过检查第一个 value 是否为字符串来判断是否为旧格式）
+UPDATE channels
+SET model_mapping = jsonb_build_object('anthropic', model_mapping)
+WHERE model_mapping IS NOT NULL
+  AND model_mapping::text NOT IN ('{}', 'null', '')
+  AND NOT EXISTS (
+      SELECT 1 FROM jsonb_each(model_mapping) AS kv
+      WHERE jsonb_typeof(kv.value) = 'object'
+      LIMIT 1
+  );

backend/migrations/087_usage_log_billing_mode.sql

+-- Add billing_mode to usage_logs (records the billing mode: token/per_request/image)
+ALTER TABLE usage_logs ADD COLUMN IF NOT EXISTS billing_mode VARCHAR(20);

backend/migrations/088_channel_billing_model_source_channel_mapped.sql

+-- Change default billing_model_source for new channels to 'channel_mapped'
+-- Existing channels keep their current setting (no UPDATE on existing rows)
+ALTER TABLE channels ALTER COLUMN billing_model_source SET DEFAULT 'channel_mapped';

backend/migrations/089_usage_log_image_output_tokens.sql

+ALTER TABLE usage_logs ADD COLUMN IF NOT EXISTS image_output_tokens INTEGER NOT NULL DEFAULT 0;
+ALTER TABLE usage_logs ADD COLUMN IF NOT EXISTS image_output_cost DECIMAL(20, 10) NOT NULL DEFAULT 0;

frontend/src/api/admin/channels.ts

+/**
+ * Admin Channels API endpoints
+ * Handles channel management for administrators
+ */
+
+import { apiClient } from '../client'
+
+export type BillingMode = 'token' | 'per_request' | 'image'
+
+export interface PricingInterval {
+  id?: number
+  min_tokens: number
+  max_tokens: number | null
+  tier_label: string
+  input_price: number | null
+  output_price: number | null
+  cache_write_price: number | null
+  cache_read_price: number | null
+  per_request_price: number | null
+  sort_order: number
+}
+
+export interface ChannelModelPricing {
+  id?: number
+  platform: string
+  models: string[]
+  billing_mode: BillingMode
+  input_price: number | null
+  output_price: number | null
+  cache_write_price: number | null
+  cache_read_price: number | null
+  image_output_price: number | null
+  per_request_price: number | null
+  intervals: PricingInterval[]
+}
+
+export interface Channel {
+  id: number
+  name: string
+  description: string
+  status: string
+  billing_model_source: string // "requested" | "upstream"
+  restrict_models: boolean
+  group_ids: number[]
+  model_pricing: ChannelModelPricing[]
+  model_mapping: Record<string, Record<string, string>> // platform → {src→dst}
+  created_at: string
+  updated_at: string
+}
+
+export interface CreateChannelRequest {
+  name: string
+  description?: string
+  group_ids?: number[]
+  model_pricing?: ChannelModelPricing[]
+  model_mapping?: Record<string, Record<string, string>>
+  billing_model_source?: string
+  restrict_models?: boolean
+}
+
+export interface UpdateChannelRequest {
+  name?: string
+  description?: string
+  status?: string
+  group_ids?: number[]
+  model_pricing?: ChannelModelPricing[]
+  model_mapping?: Record<string, Record<string, string>>
+  billing_model_source?: string
+  restrict_models?: boolean
+}
+
+interface PaginatedResponse<T> {
+  items: T[]
+  total: number
+}
+
+/**
+ * List channels with pagination
+ */
+export async function list(
+  page: number = 1,
+  pageSize: number = 20,
+  filters?: {
+    status?: string
+    search?: string
+  },
+  options?: { signal?: AbortSignal }
+): Promise<PaginatedResponse<Channel>> {
+  const { data } = await apiClient.get<PaginatedResponse<Channel>>('/admin/channels', {
+    params: {
+      page,
+      page_size: pageSize,
+      ...filters
+    },
+    signal: options?.signal
+  })
+  return data
+}
+
+/**
+ * Get channel by ID
+ */
+export async function getById(id: number): Promise<Channel> {
+  const { data } = await apiClient.get<Channel>(`/admin/channels/${id}`)
+  return data
+}
+
+/**
+ * Create a new channel
+ */
+export async function create(req: CreateChannelRequest): Promise<Channel> {
+  const { data } = await apiClient.post<Channel>('/admin/channels', req)
+  return data
+}
+
+/**
+ * Update a channel
+ */
+export async function update(id: number, req: UpdateChannelRequest): Promise<Channel> {
+  const { data } = await apiClient.put<Channel>(`/admin/channels/${id}`, req)
+  return data
+}
+
+/**
+ * Delete a channel
+ */
+export async function remove(id: number): Promise<void> {
+  await apiClient.delete(`/admin/channels/${id}`)
+}
+
+export interface ModelDefaultPricing {
+  found: boolean
+  input_price?: number    // per-token price
+  output_price?: number
+  cache_write_price?: number
+  cache_read_price?: number
+  image_output_price?: number
+}
+
+export async function getModelDefaultPricing(model: string): Promise<ModelDefaultPricing> {
+  const { data } = await apiClient.get<ModelDefaultPricing>('/admin/channels/model-pricing', {
+    params: { model }
+  })
+  return data
+}
+
+const channelsAPI = { list, getById, create, update, remove, getModelDefaultPricing }
+export default channelsAPI