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PR #1914 unconditionally applied the full mimicry pipeline to all OAuth
accounts, including real Claude Code CLI clients. This replaced the
client's long system prompt (~10K+ tokens with stable cache_control
breakpoints) with a short ~45 token [billing, CC prompt] pair, which
falls below Anthropic's 1024-token minimum cacheable prefix threshold.
The result: every request created a new cache but never hit an existing
one.

Fix: restore the Claude Code client detection gate so that real CC
clients bypass body-level mimicry (system rewrite, message cache
management, tool name obfuscation). Non-CC third-party clients
(opencode, etc.) continue to receive full mimicry.

Also harden the detection logic:
- Make UA regex case-insensitive (align with claude_code_validator.go)
- Validate metadata.user_id format via ParseMetadataUserID() instead of
  just checking non-empty, preventing third-party tools from spoofing
  a claude-cli/* UA with an arbitrary user_id string to bypass mimicry

- gofmt: realign AffiliateDetail struct tags in affiliate_service.go
- ineffassign: remove dead seenCompleted assignment before return in account_test_service.go

- 在系统设置「功能开关」中新增邀请返利总开关，默认关闭；
  关闭态：菜单隐藏、注册忽略 aff、新充值不返利，但已有 quota 仍可转余额
- 支持管理员为指定用户设置专属邀请码（覆盖随机码，全局唯一）
- 支持管理员为指定用户设置专属返利比例（覆盖全局比例，可单条/批量调整）
- 在系统设置邀请返利卡片内嵌入专属用户管理表格（搜索/编辑/批量/删除），
  删除采用项目通用 ConfirmDialog，会同时清除专属比例并把邀请码重置为系统随机码
- /affiliate 用户页新增「我的返利比例」卡片与动态使用说明，让用户直观看到
  分享后能拿到多少（同源 resolveRebateRatePercent 计算，与实际充值一致）
- 新增数据库迁移 132 添加 aff_rebate_rate_percent 与 aff_code_custom 列
- 新增 admin 路由组 /api/v1/admin/affiliates/users/* 共 5 个端点
- AffiliateService 改为只依赖 *SettingService，去除冗余的 SettingRepository
- 邀请码格式校验放宽到 [A-Z0-9_-]{4,32}，兼容旧 12 位系统码与新自定义码
- 补充单元测试与集成测试覆盖新方法、冲突路径与边界值

将 vansour/sub2api#1555 的 OpenAI compact 能力建模手工移植到当前 main：账号
级 compact 状态/auto-force_on-force_off 模式、compact-only 模型映射、调度器
tier 分层（已支持 > 未知 > 已知不支持）、管理后台 compact 主动探测，以及对应
i18n/状态徽章。普通 /responses 流量行为不变，无数据库迁移。

The hardcoded codex CLI version (0.104.0) causes upstream rejection
when using gpt-5.5 with compact, as the server treats the request
as an outdated client and returns 400/502.

Update codexCLIVersion, codexCLIUserAgent, and openAICodexProbeVersion
to 0.125.0 to match the current Codex CLI release.

Fixes #1933, #1887, #1865
Related: #1609, #1298, #849

- staticcheck QF1001: apply De Morgan's law to the OAuth-mimic header
  passthrough guard (`!(a && b)` → `a != ... || !b`).
- unused: drop `isClaudeCodeRequest`, which became dead after PR #1914
  switched both `/v1/messages` and `/count_tokens` paths to unconditional
  `account.IsOAuth()` mimicry. The lowercase helper `isClaudeCodeClient`
  is kept (still referenced by `TestIsClaudeCodeClient`).

- Drop SetAffiliateService setters and ProvideAuthService /
  ProvidePaymentService / ProvideUserHandler wrappers in favor of direct
  Wire constructor injection. AffiliateService has no back-edge to
  Auth/Payment/User, so the indirection was never required.
- Change RegisterWithVerification's variadic affiliateCode to a fixed
  parameter; adjust all call sites.
- Validate aff_code length and charset in BindInviterByCode before any
  DB lookup, eliminating timing-side-channel and useless DB roundtrips
  on malformed input.
- Make affiliate cache invalidation synchronous; surface Redis errors
  via the project logger instead of swallowing them in a detached
  goroutine.
- Add an integration test guarding cross-layer tx propagation in
  AccrueQuota and a unit test pinning the aff_code format rules.

fix(apicompat): recognize web_search_20250305 / google_search in Responses to Anthropic tool conversion

Root cause of persistent third-party detection: sub2api's
buildUpstreamRequest transparently forwards client headers via
allowedHeaders whitelist (addHeaderRaw) before applying mimicry
overrides. When third-party clients (opencode, etc.) send their own
anthropic-beta / user-agent / x-stainless-* / x-claude-code-session-id
values, these get appended to the request alongside our injected
headers, creating an inconsistent header set that Anthropic detects.

Parrot's build_upstream_headers constructs exactly 9 headers from
scratch and never forwards anything from the client. This is why
'same opencode version, some users work some don't' — different
opencode configs/versions send different header combinations.

Fix: when tokenType=oauth and mimicClaudeCode=true, skip the
client header passthrough loop entirely. The subsequent
applyClaudeCodeMimicHeaders + ApplyFingerprint + beta merge
pipeline constructs all necessary headers from our controlled values.

Also: remove systemIncludesClaudeCodePrompt gate — OAuth accounts
now unconditionally rewrite system (even if client already sent a
Claude Code-style prompt), ensuring billing attribution block is
always present.

Before: isClaudeCodeRequest() checked whether the client looks like a
real Claude Code CLI (UA, system prompt, X-App header, metadata format).
If it looked like Claude Code, all mimicry was skipped — the assumption
being that a real CLI needs no help.

Problem: third-party tools like opencode partially impersonate Claude
Code (sending claude-cli UA + claude-code beta + CC system prompt) but
miss critical details (billing attribution block, tool-name obfuscation,
cache breakpoints, full beta set). Some users' opencode instances pass
the isClaudeCodeRequest check, causing sub2api to skip mimicry entirely,
while Anthropic still detects the request as third-party.

This explains why 'same opencode version, some users work, some don't'
— it depends on which opencode features/config trigger the validator.

Fix: OAuth accounts now unconditionally run the full mimicry pipeline,
matching Parrot's behavior (Parrot never checks client identity).
This is safe because our mimicry is strictly more complete than any
third-party client's partial impersonation.

Changed:
  - /v1/messages path: remove isClaudeCode gate
  - /v1/messages/count_tokens path: same

The previous commit only wired stripMessageCacheControl,
addMessageCacheBreakpoints, and tool-name obfuscation into
applyClaudeCodeOAuthMimicryToBody (used by /chat/completions and
/responses). The native /v1/messages path and count_tokens path
have their own independent mimicry code blocks and were missed.

Now all three entry points share the same D/E/F pipeline:
  - /v1/messages (gateway_service.go forwardAnthropic)
  - /v1/messages/count_tokens (gateway_service.go countTokens)
  - OpenAI compat (applyClaudeCodeOAuthMimicryToBody)

Implements the remaining three parity items with Parrot cc_mimicry:

  D) Tool-name obfuscation
     - Dynamic mapping when tools.length > 5 (matches Parrot threshold).
       Fake names follow {prefix}{name[:3]}{i:02d} (e.g. 'manage_bas00').
       Go port of random.Random(hash(tuple(names))) uses fnv64a seed +
       math/rand; byte-exact reproduction is impossible (Python hash vs
       Go hash), but the two invariants that matter are preserved:
         * same input tool_names yield identical mapping (cache hit)
         * prefix pool is shuffled (names look distributed)
     - Static prefix map (sessions_ -> cc_sess_, session_ -> cc_ses_)
       applied as fallback, matching Parrot TOOL_NAME_REWRITES verbatim.
     - Server tools (web_search_20250305, computer_*, etc.) are NOT
       renamed; only type=='function' and type=='custom' tools are.
     - tool_choice.name is rewritten in sync (only when type=='tool').
     - Response side: bytes-level replace on every SSE chunk / JSON
       body at 6 injection points (standard stream/non-stream,
       passthrough stream/non-stream, chat_completions stream +
       non-stream, responses stream + non-stream). Reverse mapping
       applied longest-fake-name-first to prevent substring conflicts
       (parity with Parrot _restore_tool_names_in_chunk).
     - tool_choice is no longer unconditionally deleted in
       normalizeClaudeOAuthRequestBody — Parrot passes it through.

  E) tools[-1] cache_control breakpoint
     - Injected as {type:ephemeral, ttl:<DefaultCacheControlTTL>} when
       the last tool has no cache_control. Client-provided ttl is
       passed through unchanged (repo-wide policy).

  F) messages cache_control strategy
     - stripMessageCacheControl removes every client-provided
       messages[*].content[*].cache_control (multi-turn stability).
     - addMessageCacheBreakpoints then injects two stable breakpoints:
       (1) last message, and (2) second-to-last user turn when
       messages.length >= 4.
     - Combined with the system block breakpoint and tools[-1]
       breakpoint, this gives exactly the 4 breakpoints Anthropic
       allows per request.

Non-trivial implementation details to be aware of when rebasing:

  * Two new files, no upstream collision:
      gateway_tool_rewrite.go       (D + E algorithms)
      gateway_messages_cache.go     (F strip + breakpoints)
  * Two new feature calls bolted onto the tail of
    applyClaudeCodeOAuthMimicryToBody in gateway_service.go — rebase
    conflicts will be ~10 lines maximum.
  * Response-side injection points all wrap their existing write with
    reverseToolNamesIfPresent(c, ...), preserving original behavior
    when no mapping is stored (static prefix rollback still runs).
  * Non-stream chat/responses switched from c.JSON to
    json.Marshal + c.Data so bytes-level replace is possible.
  * Retry bodies (FilterThinkingBlocksForRetry,
    FilterSignatureSensitiveBlocksForRetry, RectifyThinkingBudget)
    only prune blocks — they preserve the already-obfuscated tool
    names, so no extra mapping re-application is needed.

Manual QA: end-to-end scenario verified with 6 tools (above threshold)
and tool_choice.type=='tool'. Obfuscation + restore roundtrip shown
in test logs; then removed the temp test file.

Tests (16 new):
  - buildDynamicToolMap stability + below-threshold guard
  - sanitizeToolName precedence (dynamic > static)
  - restoreToolNamesInBytes longest-first + static rollback
  - applyToolNameRewriteToBody skips server tools + syncs tool_choice
  - applyToolsLastCacheBreakpoint defaults to 5m + passes client ttl
  - stripMessageCacheControl + addMessageCacheBreakpoints in the
    1/4/string-content cases + second-to-last user turn selection
  - buildToolNameRewriteFromBody ReverseOrdered is desc-by-fake-length
  - fake name shape follows Parrot {prefix}{head3}{i:02d}

Three field-level alignments in normalizeClaudeOAuthRequestBody to
match real Claude Code CLI traffic byte-for-byte:

  1. temperature: previously deleted unconditionally; now passes
     through client value, defaults to 1 when absent (real CLI
     always sends temperature, default 1).

  2. max_tokens: defaults to 128000 when absent (real CLI default).

  3. context_management: when thinking.type is enabled/adaptive
     and the client did not provide context_management, inject
     {"edits":[{"type":"clear_thinking_20251015","keep":"all"}]}
     to mirror real CLI behavior.

tool_choice removal is unchanged (Claude Code OAuth credentials
do not allow client-supplied tool_choice).

Tests updated:
  - gateway_body_order_test.go: temperature/max_tokens are now
    expected in output; tool_choice still removed.
  - gateway_prompt_test.go: system array is now 2 blocks
    (billing + cc prompt), assertions adjusted.
  - gateway_anthropic_apikey_passthrough_test.go: same 2-block
    assertion.

Real Claude Code CLI always sends a 2-block system array:

  [0] {"type":"text", "text":"x-anthropic-billing-header: cc_version=X.Y.Z.{fp}; cc_entrypoint=cli; cch=00000;"}
  [1] {"type":"text", "text":"You are Claude Code...", "cache_control":{...}}

Before this commit, sub2api's mimicry path only produced block [1].
The missing billing block is one of the primary third-party detection
signals Anthropic uses for Claude-Code-scoped OAuth tokens.

New file gateway_billing_block.go ports the fingerprint algorithm
(byte-for-byte from Parrot cc_mimicry.py:compute_fingerprint):
pick chars at positions [4,7,20] of the first user text, then
`sha256(SALT + chars + cc_version)[:3]`.

  - claude/constants.go: CLICurrentVersion = "2.1.92" (must match UA)
  - gateway_billing_block.go: computeClaudeCodeFingerprint +
    buildBillingAttributionBlockJSON + extractFirstUserText
  - gateway_service.go: rewriteSystemForNonClaudeCode now emits both
    blocks in order; cch=00000 is filled in later by
    signBillingHeaderCCH in buildUpstreamRequest.

Downstream compat note: syncBillingHeaderVersion's regex
`cc_version=\d+\.\d+\.\d+` only matches the semver triple,
leaving the `.{fp}` suffix intact when rewriting in buildUpstreamRequest.

Real Claude CLI traffic sends cache_control as
`{"type":"ephemeral","ttl":"1h"}`. Our previous payload only
sent `{"type":"ephemeral"}`, which is a bytewise mismatch with
the official CLI and one more third-party detection signal.

Policy: client-provided ttl is always passed through unchanged.
Proxy-generated cache_control blocks default to 5m (vs Parrot's 1h)
to avoid burning the 1h cache budget on automatic breakpoints while
still aligning with the `ttl` field being present.

  - claude/constants.go: DefaultCacheControlTTL = "5m"
  - apicompat/types.go: new AnthropicCacheControl type with TTL field;
    AnthropicTool gains optional CacheControl pointer so the mimicry
    path can attach a cache breakpoint to tools[-1] later.
  - service/gateway_service.go: anthropicCacheControlPayload gains TTL;
    marshalAnthropicSystemTextBlock and rewriteSystemForNonClaudeCode
    emit ttl=5m by default.

The previous commit added FullClaudeCodeMimicryBetas() but the two
call sites in buildUpstreamRequest still hardcoded the old 3-token
subset. Anthropic now checks the complete set of beta tokens to
decide if a request qualifies as Claude Code. Wire them up:

  - /v1/messages mimic path: requiredBetas = FullClaudeCodeMimicryBetas()
  - /v1/messages/count_tokens mimic path: same + BetaTokenCounting

Haiku models keep the 2-token exemption (BetaOAuth + InterleaveThinking).

Before: the OpenAI-compat forwarders only called injectClaudeCodePrompt,
which prepends the Claude Code banner but leaves the rest of the body
in its original non-Claude-Code shape. The codebase already admits this
is insufficient (see the comment on rewriteSystemForNonClaudeCode in
gateway_service.go: "仅前置追加 Claude Code 提示词无法通过检测").

Effect: OAuth accounts served through /v1/chat/completions or /v1/responses
were detected as third-party apps and bled plan quota with:

    Third-party apps now draw from your extra usage, not your plan limits.

Fix:
  - apicompat.AnthropicRequest: add Metadata json.RawMessage so metadata
    survives the OpenAI->Anthropic->Marshal round trip; without it the
    downstream rewrite has no user_id to work with.
  - service: extract applyClaudeCodeOAuthMimicryToBody, a ParsedRequest-free
    variant of the /v1/messages mimicry pipeline
    (rewriteSystemForNonClaudeCode + normalizeClaudeOAuthRequestBody +
    metadata.user_id injection) so the OpenAI-compat forwarders can reuse it.
  - service: add buildOAuthMetadataUserIDFromBody + hashBodyForSessionSeed
    for the same reason (no ParsedRequest at the call site).
  - ForwardAsChatCompletions / ForwardAsResponses: replace the 3-line
    prompt-prepend with the full mimicry pipeline.
  - applyClaudeCodeMimicHeaders: set x-client-request-id per-request
    (real Claude CLI always does); missing/duplicated values are one more
    third-party fingerprint signal.

No change to the native /v1/messages path: it already called the full
pipeline, we only lift those helpers into a reusable function.

Tests:
  - go build ./... passes
  - go test ./internal/service/... ./internal/pkg/apicompat/... passes
  - lsp_diagnostics clean on all touched files
  - pre-existing failures in internal/config are unrelated (env-sensitive
    tests that also fail on upstream main)

Align Claude Code mimicry constants with the latest real CLI traffic
(see Parrot's src/transform/cc_mimicry.py). Anthropic now uses the full
set of anthropic-beta tokens to decide whether a request counts as
"official Claude Code"; requests missing tokens that real CLI ships
today are demoted to third-party usage:

  Third-party apps now draw from your extra usage, not your plan limits.

Changes:
  - claude/constants.go: add new beta tokens (prompt-caching-scope,
    effort, redact-thinking, context-management, extended-cache-ttl) and
    expose FullClaudeCodeMimicryBetas() for the OAuth mimicry path.
  - claude/constants.go: bump default User-Agent to claude-cli/2.1.92.
  - identity_service.go: bump defaultFingerprint User-Agent accordingly.

No behavioral change for clients that already send a newer UA (fingerprint
merge still prefers the incoming value).

In reconstructResponseOutputFromSSE, text content Marshal/Unmarshal
failure previously caused an early return that silently discarded
already-extracted image_generation_call outputs. Now serialization
errors are tolerated so image results still reach the client.

Revert payment/wechat, sora/claude-max cleanup, fork-only migrations,
and cosmetic changes that were brought in by the release sync commit.
Keep only channel-monitor related improvements:
- PublicSettingsInjectionPayload named struct with drift test
- ChannelMonitorRunner graceful shutdown in wire
- image_output_price in SupportedModelChip
- Simplified buildSelfNavItems in AppSidebar
- Gateway WARN logs for 503 branches

- Extract PublicSettingsInjectionPayload named struct with drift test
- Add channel_monitor_default_interval_seconds to SSR injection
- Add image_output_price to SupportedModelChip
- Simplify AppSidebar buildSelfNavItems (admins see available channels)
- Add gateway WARN logs for 503 no-available-accounts branches
- Wire ChannelMonitorRunner into provideCleanup for graceful shutdown
- Add migrations 130/131 (CC template userid fix + mimicry field cleanup)
- Clean up fork-only features (sora, claude max simulation, client affinity)
- Remove ~320 obsolete i18n keys
- Add codexUsage utility, WechatServiceButton, BulkEditAccountModal
- Tidy go.sum

Service layer (payment_fulfillment_order_not_found_test.go):
- TestHandlePaymentNotification_UnknownOrder_ReturnsSentinel: in-memory
  sqlite ent client, query for a non-existent out_trade_no → errors.Is
  must recognise ErrOrderNotFound (handler relies on this to ack 200).
- TestHandlePaymentNotification_NonSuccessStatus_Skips: non-success
  notification short-circuits before DB lookup → nil error.
- TestErrOrderNotFound_DistinctFromOtherErrors: generic errors must not
  match the sentinel (prevents silently swallowing DB failures).

Handler layer (payment_webhook_handler_test.go):
- TestUnknownOrderWebhookAcksWithSuccess: locks the two ingredients the
  handleNotify ack path depends on — fmt.Errorf %w wrapping preserves
  errors.Is recognition, and writeSuccessResponse(stripe) returns an
  empty 200 body that Stripe treats as acknowledged.

Introduce a sentinel ErrOrderNotFound in the payment service layer so the
webhook handler can distinguish "the out_trade_no does not exist in our DB"
from other fulfillment failures, and downgrade the former to a WARN log +
success response.

Background
- Providers (Stripe, Alipay, Wxpay, EasyPay, ...) retry webhooks whenever
  we answer non-2xx. When a webhook endpoint is misconfigured (e.g. a
  foreign environment points at us) or our orders table has been wiped,
  we return 500 forever and the provider retries for days, spamming logs.
- The old code also collapsed "order not found" and "DB query failed" into
  the same branch — a DB blip would be reported as "order not found" and
  swallowed.

Service layer (payment_fulfillment.go)
- Add `var ErrOrderNotFound = errors.New("payment order not found")`.
- In HandlePaymentNotification, distinguish the two error paths:
  * dbent.IsNotFound(err) → wrap with ErrOrderNotFound so callers can
    errors.Is(...) it.
  * anything else → wrap the original err with %w so it still bubbles up
    as 500 and the provider retries (DB hiccup should be retried).

Handler layer (payment_webhook_handler.go)
- Before returning 500, check errors.Is(err, service.ErrOrderNotFound):
  emit a WARN (with provider / outTradeNo / tradeNo for discoverability),
  then call writeSuccessResponse so the provider sees its expected 2xx
  body (Stripe empty body / Wxpay JSON / others "success").
- Other errors retain the existing 500 behavior.

Monitoring note: because this path now swallows unknown-order webhooks
silently from the provider's perspective, the WARN log line is the only
signal. Alert on "unknown order, acking to stop retries" if you want
visibility into misrouted webhooks or accidental data loss.

The drift test referenced service.PublicSettingsInjectionPayload, a
named type introduced by a5b05538 but dropped when we cherry-picked
that commit into feat/channel-insights (we kept the inline struct from
HEAD to avoid pulling fork-only helpers from setting_service.go). The
test therefore could not compile. The 2 new public-settings fields
(channel_monitor_enabled, available_channels_enabled) are still covered
by manual wiring in GetPublicSettingsForInjection.

P0:
- rpm_override 嵌入 Auth Cache Snapshot，消除每请求 DB 查询 (snapshot v6→v7)
- 429 RPM 响应返回 Retry-After 头（当前分钟剩余秒数）

P1:
- ClearAll 按钮直连 DELETE API，带 loading 防重复
- 新增 GET /admin/users/:id/rpm-status 管理员 RPM 用量查询端点

优化:
- checkRPM 从级联互斥改为并行取最严，user.rpm_limit 作为全局硬上限始终生效
- Override/Group 变更后自动失效 auth cache
- fail-open 语义不变，Redis 故障不阻塞业务