chore(mcp): JetBrains polish + aichat/openai plugins

[acedatacloud-dev]

JetBrains polish + add aichat/openai plugins (vscode + jetbrains)

Follow-up to #N (feat/vscode-ext-revamp, the hosted-HTTP VS Code refresh).
This PR cleans up the JetBrains plugins and fills the two missing
services on both marketplaces.

What changed

1. JetBrains tool counts: align with reality (@mcp.tool() count)

Service	README/plugin.xml said	Actual tools	Fixed
suno	27	35	✅
veo	8	14	✅

Other services were already accurate.

2. JetBrains pluginSinceBuild: 252 → 251 (17 services)

252 (= IntelliJ Platform 2025.2) was too narrow. JetBrains AI
Assistant first shipped MCP support in 2025.1 (build 251), so
the floor is 251. Bumping below 251 makes no sense — the IDE
literally cannot host an MCP server. Bumped via bulk sed, verified
0 leftover 252 and 17 hits on the new value.

Affected: face fish flux hailuo kling luma midjourney nanobanana producer seedance seedream serp shorturl sora suno veo wan.

3. New: aichat/vscode/ + aichat/jetbrains/

aichat is the unified OpenAI-compatible LLM gateway (mcp-aichat,
hosted at https://aichat.mcp.acedata.cloud/mcp, repo
AceDataCloud/AiChatMCP). It exposes 4 tools — create
conversation (v1 + v2), list models, usage guide.

• vscode/: revamped layout (HTTP type + Authorization: Bearer ${input:acedatacloud_api_token} + password: true input). Same
  shape as the 17 plugins shipped in feat/vscode-ext-revamp.
• jetbrains/: scaffolded from serp/jetbrains/ (Gradle 8.12,
  IntelliJ Platform 2.6.0, Kotlin 2.1.20, Java 21, IC 2025.2).
  Settings UI + STDIO/HTTP copy actions, package
  com.acedatacloud.mcp.aichat.

4. New: openai/vscode/ + openai/jetbrains/

openai is the OpenAI passthrough (mcp-openai, hosted at
https://openai.mcp.acedata.cloud/mcp, repo AceDataCloud/OpenAIMCP).
It exposes 11 tools — chat completion, embeddings, image
generation/edit, Responses API, async task management, model
listings, usage guide.

Same structure as aichat.

Skipped intentionally

• Smithery (smithery.yaml) — the file format is only for
  describing stdio MCPB bundles. Listing the hosted HTTP URL on
  Smithery is a web-UI/API operation, not a file edit. Filed as an
  ops follow-up: register the hosted URLs at
  https://smithery.ai/new for the 19 services (17 existing + the 2
  added here).
• Glama enrichment — glama.json only documents $schema +
  maintainers. All other listing content (description, categories,
  logo) is auto-scanned from the README and GitHub repo, so the
  revamped READMEs already drive what users see.

Deferred follow-ups (separate PRs)

• JetBrains plugin icon duplicates — 6 plugins share 2 SVG
  hashes (hailuo/kling/luma and flux/producer/wan).
  Needs design assets, not a one-liner.

Verification

• find {aichat,openai}/{jetbrains,vscode} -type f: 18 + 5 + 18 + 5 files written.
• grep -ri "serp" {aichat,openai}/{jetbrains,vscode}: 0 leftover refs.
• grep "pluginSinceBuild" */jetbrains/gradle.properties | grep "= 252": 0 hits.
• Tool counts cross-checked against git ls-files <svc>/tools/*.py | xargs grep -c '@mcp.tool()'.

Bot identity

Commits authored as Ace Data Cloud Dev <dev@acedata.cloud>. PR
created with GH_TOKEN=$GITHUB_BOT_TOKEN.