fix: 移除 auto mode 的 provider 和模型白名单限制

移除 firstParty provider 限制和 claude-(opus|sonnet)-4-[67] 模型白名单，
使所有模型和 provider 在 TRANSCRIPT_CLASSIFIER feature 启用时均可使用 auto mode。

Co-Authored-By: glm-5-turbo <zai-org@claude-code-best.win>

src/utils/betas.ts

@@ -157,42 +157,8 @@ export function modelSupportsStructuredOutputs(model: string): boolean {
   )
 }
 
-// @[MODEL LAUNCH]: Add the new model if it supports auto mode (specifically PI probes) — ask in #proj-claude-code-safety-research.
-export function modelSupportsAutoMode(model: string): boolean {
-  if (feature('TRANSCRIPT_CLASSIFIER')) {
-    const m = getCanonicalName(model)
-    // External: firstParty-only at launch (PI probes not wired for
-    // Bedrock/Vertex/Foundry yet). Checked before allowModels so the GB
-    // override can't enable auto mode on unsupported providers.
-    if (process.env.USER_TYPE !== 'ant' && getAPIProvider() !== 'firstParty') {
-      return false
-    }
-    // GrowthBook override: tengu_auto_mode_config.allowModels force-enables
-    // auto mode for listed models, bypassing the denylist/allowlist below.
-    // Exact model IDs (e.g. "claude-strudel-v6-p") match only that model;
-    // canonical names (e.g. "claude-strudel") match the whole family.
-    const config = getFeatureValue_CACHED_MAY_BE_STALE<{
-      allowModels?: string[]
-    }>('tengu_auto_mode_config', {})
-    const rawLower = model.toLowerCase()
-    if (
-      config?.allowModels?.some(
-        am => am.toLowerCase() === rawLower || am.toLowerCase() === m,
-      )
-    ) {
-      return true
-    }
-    if (process.env.USER_TYPE === 'ant') {
-      // Denylist: block known-unsupported claude models, allow everything else (ant-internal models etc.)
-      if (m.includes('claude-3-')) return false
-      // claude-*-4 not followed by -[6-9]: blocks bare -4, -4-YYYYMMDD, -4@, -4-0 thru -4-5
-      if (/claude-(opus|sonnet|haiku)-4(?!-[6-9])/.test(m)) return false
-      return true
-    }
-    // External allowlist (firstParty already checked above).
-    return /^claude-(opus|sonnet)-4-[67]/.test(m)
-  }
-  return false
+export function modelSupportsAutoMode(_model: string): boolean {
+  return feature('TRANSCRIPT_CLASSIFIER')
 }
 
 /**