chore: 移除 binaryCheck/claudeAiLimits/codeIndexing 中未引用的导出

- binaryCheck.ts: 删除 clearBinaryCache（零调用，binaryCache 仍由 isBinaryInstalled 使用）
- claudeAiLimits.ts: 删除 RATE_LIMIT_DISPLAY_NAMES 常量 + getRateLimitDisplayName（互为唯一消费者）
- codeIndexing.ts: 删除 detectCodeIndexingFromMcpTool（同胞 detectCodeIndexingFromCommand/McpServerName 仍活跃）

Co-Authored-By: glm-5.2 <zai-org@claude-code-best.win>

src/services/claudeAiLimits.ts

@@ -78,18 +78,6 @@ const EARLY_WARNING_CLAIM_MAP: Record<string, RateLimitType> = {
   overage: 'overage',
 }
 
-const RATE_LIMIT_DISPLAY_NAMES: Record<RateLimitType, string> = {
-  five_hour: 'session limit',
-  seven_day: 'weekly limit',
-  seven_day_opus: 'Opus limit',
-  seven_day_sonnet: 'Sonnet limit',
-  overage: 'extra usage limit',
-}
-
-export function getRateLimitDisplayName(type: RateLimitType): string {
-  return RATE_LIMIT_DISPLAY_NAMES[type] || type
-}
-
 /**
  * Calculate what fraction of a time window has elapsed.
  * Used for time-relative early warning fallback.

src/utils/binaryCheck.ts

@@ -44,10 +44,3 @@ export async function isBinaryInstalled(command: string): Promise<boolean> {
 
   return exists
 }
-
-/**
- * Clear the binary check cache (useful for testing)
- */
-export function clearBinaryCache(): void {
-  binaryCache.clear()
-}

src/utils/codeIndexing.ts

@@ -145,44 +145,6 @@ export function detectCodeIndexingFromCommand(
   return CLI_COMMAND_MAPPING[firstWord]
 }
 
-/**
- * Detects if an MCP tool is from a code indexing server.
- *
- * @param toolName - The MCP tool name (format: mcp__serverName__toolName)
- * @returns The code indexing tool identifier, or undefined if not a code indexing tool
- *
- * @example
- * detectCodeIndexingFromMcpTool('mcp__sourcegraph__search') // returns 'sourcegraph'
- * detectCodeIndexingFromMcpTool('mcp__cody__chat') // returns 'cody'
- * detectCodeIndexingFromMcpTool('mcp__filesystem__read') // returns undefined
- */
-export function detectCodeIndexingFromMcpTool(
-  toolName: string,
-): CodeIndexingTool | undefined {
-  // MCP tool names follow the format: mcp__serverName__toolName
-  if (!toolName.startsWith('mcp__')) {
-    return undefined
-  }
-
-  const parts = toolName.split('__')
-  if (parts.length < 3) {
-    return undefined
-  }
-
-  const serverName = parts[1]
-  if (!serverName) {
-    return undefined
-  }
-
-  for (const { pattern, tool } of MCP_SERVER_PATTERNS) {
-    if (pattern.test(serverName)) {
-      return tool
-    }
-  }
-
-  return undefined
-}
-
 /**
  * Detects if an MCP server name corresponds to a code indexing tool.
  *