Feat/pricing config enhancement (#781)

* feat(db): add pricing config fields to proxy_config table

- Add default_cost_multiplier field per app type
- Add pricing_model_source field (request/response)
- Add request_model field to proxy_request_logs table
- Implement schema migration v5

* feat(api): add pricing config commands and provider meta fields

- Add get/set commands for default cost multiplier
- Add get/set commands for pricing model source
- Extend ProviderMeta with cost_multiplier and pricing_model_source
- Register new commands in Tauri invoke handler

* fix(proxy): apply cost multiplier to total cost only

- Move multiplier calculation from per-item to total cost
- Add resolve_pricing_config for provider-level override
- Include request_model and cost_multiplier in usage logs
- Return new fields in get_request_logs API

* feat(ui): add pricing config UI and usage log enhancements

- Add pricing config section to provider advanced settings
- Refactor PricingConfigPanel to compact table layout
- Display all three apps (Claude/Codex/Gemini) in one view
- Add multiplier column and request model display to logs
- Add frontend API wrappers for pricing config

* feat(i18n): add pricing config translations

- Add zh/en/ja translations for pricing defaults config
- Add translations for multiplier, requestModel, responseModel
- Add provider pricing config translations

* fix(pricing): align backfill cost calculation with real-time logic

- Fix backfill to deduct cache_read_tokens from input (avoid double billing)
- Apply multiplier only to total cost, not to each item
- Add multiplier display in request detail panel with i18n support
- Use AppError::localized for backend error messages
- Fix init_proxy_config_rows to use per-app default values
- Fix silent failure in set_default_cost_multiplier/set_pricing_model_source
- Add clippy allow annotation for test mutex across await

* style: format code with cargo fmt and prettier

* fix(tests): correct error type assertions in proxy DAO tests

The tests expected AppError::InvalidInput but the DAO functions use
AppError::localized() which returns AppError::Localized variant.
Updated assertions to match the correct error type with key validation.

---------

Co-authored-by: Jason <farion1231@gmail.com>

src/components/providers/forms/ProviderForm.tsx

@@ -46,7 +46,10 @@ import { BasicFormFields } from "./BasicFormFields";
 import { ClaudeFormFields } from "./ClaudeFormFields";
 import { CodexFormFields } from "./CodexFormFields";
 import { GeminiFormFields } from "./GeminiFormFields";
-import { ProviderAdvancedConfig } from "./ProviderAdvancedConfig";
+import {
+  ProviderAdvancedConfig,
+  type PricingModelSourceOption,
+} from "./ProviderAdvancedConfig";
 import {
   useProviderCategory,
   useApiKeyState,
@@ -121,6 +124,9 @@ interface ProviderFormProps {
   showButtons?: boolean;
 }
 
+const normalizePricingSource = (value?: string): PricingModelSourceOption =>
+  value === "request" || value === "response" ? value : "inherit";
+
 export function ProviderForm({
   appId,
   providerId,
@@ -168,6 +174,19 @@ export function ProviderForm({
   const [proxyConfig, setProxyConfig] = useState<ProviderProxyConfig>(
     () => initialData?.meta?.proxyConfig ?? { enabled: false },
   );
+  const [pricingConfig, setPricingConfig] = useState<{
+    enabled: boolean;
+    costMultiplier?: string;
+    pricingModelSource: PricingModelSourceOption;
+  }>(() => ({
+    enabled:
+      initialData?.meta?.costMultiplier !== undefined ||
+      initialData?.meta?.pricingModelSource !== undefined,
+    costMultiplier: initialData?.meta?.costMultiplier,
+    pricingModelSource: normalizePricingSource(
+      initialData?.meta?.pricingModelSource,
+    ),
+  }));
 
   // 使用 category hook
   const { category } = useProviderCategory({
@@ -188,6 +207,15 @@ export function ProviderForm({
     setEndpointAutoSelect(initialData?.meta?.endpointAutoSelect ?? true);
     setTestConfig(initialData?.meta?.testConfig ?? { enabled: false });
     setProxyConfig(initialData?.meta?.proxyConfig ?? { enabled: false });
+    setPricingConfig({
+      enabled:
+        initialData?.meta?.costMultiplier !== undefined ||
+        initialData?.meta?.pricingModelSource !== undefined,
+      costMultiplier: initialData?.meta?.costMultiplier,
+      pricingModelSource: normalizePricingSource(
+        initialData?.meta?.pricingModelSource,
+      ),
+    });
   }, [appId, initialData]);
 
   const defaultValues: ProviderFormData = useMemo(
@@ -940,6 +968,13 @@ export function ProviderForm({
       // 添加高级配置
       testConfig: testConfig.enabled ? testConfig : undefined,
       proxyConfig: proxyConfig.enabled ? proxyConfig : undefined,
+      costMultiplier: pricingConfig.enabled
+        ? pricingConfig.costMultiplier
+        : undefined,
+      pricingModelSource:
+        pricingConfig.enabled && pricingConfig.pricingModelSource !== "inherit"
+          ? pricingConfig.pricingModelSource
+          : undefined,
     };
 
     onSubmit(payload);
@@ -1464,8 +1499,10 @@ export function ProviderForm({
         <ProviderAdvancedConfig
           testConfig={testConfig}
           proxyConfig={proxyConfig}
+          pricingConfig={pricingConfig}
           onTestConfigChange={setTestConfig}
           onProxyConfigChange={setProxyConfig}
+          onPricingConfigChange={setPricingConfig}
         />
 
         {showButtons && (