diff --git a/src-tauri/src/agents/discovery.rs b/src-tauri/src/agents/discovery.rs
index aa9e52b..533954d 100644
--- a/src-tauri/src/agents/discovery.rs
+++ b/src-tauri/src/agents/discovery.rs
@@ -3200,17 +3200,6 @@ pub(crate) fn claude_effective_context_window(
     context_window
 }
 
-#[allow(dead_code)]
-pub(crate) fn claude_code_max_context_tokens(
-    mappings: &ClaudeDesktopModelMappings,
-    models: &[AgentModelOption],
-) -> Result<u64, String> {
-    let model = mappings.sonnet.as_str();
-    let context_window = claude_effective_context_window(models, model, mappings.sonnet_1m)
-        .ok_or_else(|| format!("CPA 模型 API 未返回 Claude Code 主模型 {model} 的上下文窗口"))?;
-    Ok(context_window)
-}
-
 pub(crate) fn agent_model_display_name<'a>(
     models: &'a [AgentModelOption],
     model_name: &'a str,
diff --git a/src-tauri/src/core_config/settings.rs b/src-tauri/src/core_config/settings.rs
index 6c9ff9f..213e3d2 100644
--- a/src-tauri/src/core_config/settings.rs
+++ b/src-tauri/src/core_config/settings.rs
@@ -1667,15 +1667,6 @@ pub(crate) fn sanitize_gui_config(config: &mut GuiConfigFile) -> Result<bool, St
     Ok(changed)
 }
 
-#[allow(dead_code)]
-pub(crate) fn write_gui_config_legacy(config: &GuiConfigFile) -> Result<(), String> {
-    validate_gui_config(config)?;
-    let config_path = gui_config_path()?;
-    let content =
-        toml::to_string_pretty(config).map_err(|err| format!("序列化 GUI 配置失败: {err}"))?;
-    write_yaml_if_changed(&config_path, &content).map(|_| ())
-}
-
 pub(crate) fn write_gui_config(config: &GuiConfigFile) -> Result<(), String> {
     write_gui_config_to_path(config, &gui_config_path()?)
 }
diff --git a/src-tauri/src/usage.rs b/src-tauri/src/usage.rs
index f47e999..0468a6e 100644
--- a/src-tauri/src/usage.rs
+++ b/src-tauri/src/usage.rs
@@ -1894,14 +1894,6 @@ fn set_collector_status(
     });
 }
 
-fn persist_queue_items(
-    root: &Path,
-    items: Vec<Value>,
-    config: &GuiConfigFile,
-) -> Result<usize, String> {
-    persist_queue_items_from_source(root, HTTP_USAGE_QUEUE_SOURCE, items, config)
-}
-
 fn persist_queue_items_from_source(
     root: &Path,
     source: &str,
@@ -4722,8 +4714,9 @@ mod tests {
         let root = test_root("usage-control-messages");
         initialize_usage_storage_at(&root).unwrap();
         let config = GuiConfigFile::default();
-        let inserted = persist_queue_items(
+        let inserted = persist_queue_items_from_source(
             &root,
+            HTTP_USAGE_QUEUE_SOURCE,
             vec![
                 serde_json::json!({"refresh": true}),
                 serde_json::json!({"support_refresh": true}),
@@ -4791,8 +4784,9 @@ mod tests {
         let root = test_root("queue-events-without-generation");
         initialize_usage_storage_at(&root).unwrap();
         let config = GuiConfigFile::default();
-        let inserted = persist_queue_items(
+        let inserted = persist_queue_items_from_source(
             &root,
+            HTTP_USAGE_QUEUE_SOURCE,
             vec![
                 serde_json::json!({
                     "timestamp": "2026-07-29T10:00:00+08:00",
@@ -4856,8 +4850,9 @@ mod tests {
         let root = test_root("usage-failure-details");
         initialize_usage_storage_at(&root).unwrap();
         let config = GuiConfigFile::default();
-        persist_queue_items(
+        persist_queue_items_from_source(
             &root,
+            HTTP_USAGE_QUEUE_SOURCE,
             vec![
                 serde_json::json!({
                     "timestamp": "2026-07-29T10:00:00+08:00",
diff --git a/src-tauri/src/usage/resp.rs b/src-tauri/src/usage/resp.rs
index 7a4edbb..2a07031 100644
--- a/src-tauri/src/usage/resp.rs
+++ b/src-tauri/src/usage/resp.rs
@@ -214,17 +214,6 @@ enum ParseResult {
     Incomplete,
 }
 
-fn parse_resp_frame(input: &[u8], offset: usize, depth: usize) -> Result<ParseResult, String> {
-    let mut remaining_bulk_bytes = SUBSCRIPTION_LIMITS.max_total_bulk_bytes;
-    parse_resp_frame_with_limits(
-        input,
-        offset,
-        depth,
-        SUBSCRIPTION_LIMITS,
-        &mut remaining_bulk_bytes,
-    )
-}
-
 fn parse_resp_frame_with_limits(
     input: &[u8],
     offset: usize,
@@ -384,7 +373,15 @@ mod tests {
     #[test]
     fn parses_usage_subscription_message() {
         let input = b"*3\r\n$7\r\nmessage\r\n$5\r\nusage\r\n$16\r\n{\"request_id\":1}\r\n";
-        let ParseResult::Complete(value, consumed) = parse_resp_frame(input, 0, 0).unwrap() else {
+        let mut remaining_bulk_bytes = SUBSCRIPTION_LIMITS.max_total_bulk_bytes;
+        let ParseResult::Complete(value, consumed) = parse_resp_frame_with_limits(
+            input,
+            0,
+            0,
+            SUBSCRIPTION_LIMITS,
+            &mut remaining_bulk_bytes,
+        )
+        .unwrap() else {
             panic!("expected complete RESP frame");
         };
         assert_eq!(consumed, input.len());
@@ -396,7 +393,14 @@ mod tests {
 
     #[test]
     fn rejects_oversized_arrays() {
-        let error = match parse_resp_frame(b"*17\r\n", 0, 0) {
+        let mut remaining_bulk_bytes = SUBSCRIPTION_LIMITS.max_total_bulk_bytes;
+        let error = match parse_resp_frame_with_limits(
+            b"*17\r\n",
+            0,
+            0,
+            SUBSCRIPTION_LIMITS,
+            &mut remaining_bulk_bytes,
+        ) {
             Err(error) => error,
             _ => panic!("expected oversized RESP array to fail"),
         };
diff --git a/src/pages/ApiAccessPage.tsx b/src/pages/ApiAccessPage.tsx
index c3c2722..25a368a 100644
--- a/src/pages/ApiAccessPage.tsx
+++ b/src/pages/ApiAccessPage.tsx
@@ -423,7 +423,6 @@ export const exclusionsForModelSelection = (
 };
 
 export const modelSelectionForDiscovery = (
-  section: ProviderSection,
   configuredModels: ModelOption[],
   discoveredModels: ModelOption[],
   excludedModelsText: string,
@@ -1773,7 +1772,7 @@ export function ApiProviderDialog({
       setSelectedModelNames((current) =>
         initialized
           ? reconcileModelSelection(models, draft.models, current, 'refresh')
-          : modelSelectionForDiscovery(activeSection, draft.models, models, draft.excludedModelsText ?? ''));
+          : modelSelectionForDiscovery(draft.models, models, draft.excludedModelsText ?? ''));
       discoverySelectionInitializedRef.current = true;
       if (activeCategory === 'deepseek') setModelDiscoveryReady(true);
       if (!models.length) setModelError(t('apiAccess.error.noAvailableModels'));
@@ -1792,7 +1791,7 @@ export function ApiProviderDialog({
       return;
     }
     discoverySelectionInitializedRef.current = false;
-    setSelectedModelNames(modelSelectionForDiscovery(activeSection, draft.models, discoveredModels, draft.excludedModelsText ?? ''));
+    setSelectedModelNames(modelSelectionForDiscovery(draft.models, discoveredModels, draft.excludedModelsText ?? ''));
     setModelDiscoveryOpen(true);
     void discoverModels();
   };
diff --git a/src/pages/EasyModePage.tsx b/src/pages/EasyModePage.tsx
index 6d763a5..a53c34e 100644
--- a/src/pages/EasyModePage.tsx
+++ b/src/pages/EasyModePage.tsx
@@ -7,11 +7,9 @@ import {
 } from "react";
 import { invoke } from "@tauri-apps/api/core";
 import {
-  AlertCircle,
   ArrowLeft,
   ArrowRight,
   Check,
-  CheckCircle2,
   ChevronDown,
   Languages,
   LoaderCircle,
@@ -115,7 +113,6 @@ export function EasyModePage({
   const [activeStep, setActiveStep] = useState<SetupStep>(1);
   const [authMethod, setAuthMethod] = useState<AuthMethod>("oauth");
 
-  const [loadingSources, setLoadingSources] = useState(true);
   const [authFiles, setAuthFiles] = useState<Record<string, unknown>[]>([]);
   const [apiCounts, setApiCounts] = useState<Record<ApiSection, number>>({
     "openai-compatibility": 0,
@@ -124,7 +121,6 @@ export function EasyModePage({
     gemini: 0,
     codex: 0,
   });
-  const [availableModels, setAvailableModels] = useState<ModelOption[]>([]);
 
   const [oauthLoggingIn, setOauthLoggingIn] = useState<OAuthProviderId | null>(null);
   const oauthFeedback = useAppNotice();
@@ -168,7 +164,6 @@ export function EasyModePage({
   const [langMenuOpen, setLangMenuOpen] = useState(false);
 
   const refreshSourceStatus = useCallback(async () => {
-    setLoadingSources(true);
     try {
       const authFilesPayload = await managementApi.get("/auth-files");
       const files = responseList(authFilesPayload, "files");
@@ -202,8 +197,6 @@ export function EasyModePage({
       setApiCounts(counts);
     } catch (e) {
       console.warn("Failed to refresh source status", e);
-    } finally {
-      setLoadingSources(false);
     }
   }, []);
 
diff --git a/src/pages/VersionManagementPage.tsx b/src/pages/VersionManagementPage.tsx
index aaf0a95..67fd12f 100644
--- a/src/pages/VersionManagementPage.tsx
+++ b/src/pages/VersionManagementPage.tsx
@@ -84,7 +84,6 @@ export function VersionManagementPage() {
 
   const {
     status: coreStatus,
-    statusError,
     refreshStatus,
   } = useCoreRuntime();
   const {
diff --git a/tests/providerConfig.test.ts b/tests/providerConfig.test.ts
index abec0e2..3e5d0eb 100644
--- a/tests/providerConfig.test.ts
+++ b/tests/providerConfig.test.ts
@@ -357,7 +357,6 @@ describe('API 接入配置合并', () => {
 
   it('普通提供商没有模型映射时按真实开放状态初始化勾选', () => {
     const selected = modelSelectionForDiscovery(
-      'codex-api-key',
       [],
       [{ name: 'gpt-5.4' }, { name: 'gpt-image-1.5' }, { name: 'gpt-image-2' }],
       'gpt-image-*',
@@ -368,7 +367,6 @@ describe('API 接入配置合并', () => {
 
   it('普通提供商未限制模型时默认显示全部已开放', () => {
     const selected = modelSelectionForDiscovery(
-      'codex-api-key',
       [],
       [{ name: 'gpt-5.4' }, { name: 'gpt-image-2' }],
       '',
@@ -379,7 +377,6 @@ describe('API 接入配置合并', () => {
 
   it('OpenAI 兼容接入没有已保存模型时默认全选发现的模型', () => {
     const selected = modelSelectionForDiscovery(
-      'openai-compatibility',
       [],
       [{ name: 'model-a' }, { name: 'model-b' }],
       '',