fix(agent): enable streaming for OpenAI-compatible gateways that require it

[MarsDoge]

Summary

• Add configurable MCP stream response behavior for OpenAI-compatible gateways.
• Enable streaming in agent model calls and Telegram OpenAI custom-gateway clients when gateways require streamed responses.
• Harden forced-stream handling: parse streamed content/reasoning/tool calls directly, stop on finish_reason when gateways omit data:[DONE], reset an idle timeout while stream lines arrive, and retry HTTP 504 gateway timeouts.

Tests

• go test ./...
• go vet ./...
• gofmt/diff check on touched Go files

Notes

• Updated this PR only with backend stream/retry/Telegram fixes.
• Local unrelated dirty changes in api/handler_ai_model.go and web trader UI files were intentionally excluded.

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[cla-assistant]

Thank you for your submission! We really appreciate it. Like many open source projects, we ask that you sign our Contributor License Agreement before we can accept your contribution.
_{You have signed the CLA already but the status is still pending? Let us recheck it.}

[github-actions]

🤖 Advisory Check Results

These are advisory checks to help improve code quality. They won't block your PR from being merged.

📋 PR Information

Title Format: ✅ Good - Follows Conventional Commits
PR Size: 🟡 Medium (356 lines: +322 -34)

🔧 Backend Checks

Go Formatting: ⚠️ Needs formatting

Files needing formatting

agent/execution_state.go
agent/model_provider_catalog.go
agent/skill_dag_runtime.go
agent/stock.go
api/errors.go
api/handler_trader.go
api/handler_wallet.go
api/utils_test.go
config/config.go
kernel/engine.go

Go Vet: ✅ Good
Tests: ✅ Passed

Fix locally:

go fmt ./...      # Format code
go vet ./...      # Check for issues
go test ./...     # Run tests

⚛️ Frontend Checks

Build & Type Check: ✅ Success

Fix locally:

cd web
npm run build  # Test build (includes type checking)

---

📖 Resources

• Contributing Guidelines
• Migration Guide

Questions? Feel free to ask in the comments! 🙏

---

These checks are advisory and won't block your PR from being merged. This comment is automatically generated from pr-checks-run.yml.

[github-actions]

🤖 Advisory Check Results

These are advisory checks to help improve code quality. They won't block your PR from being merged.

📋 PR Information

Title Format: ✅ Good - Follows Conventional Commits
PR Size: 🟢 Small (202 lines: +201 -1)

🔧 Backend Checks

Go Formatting: ⚠️ Needs formatting

Files needing formatting

agent/execution_state.go
agent/model_provider_catalog.go
agent/skill_dag_runtime.go
agent/stock.go
api/errors.go
api/handler_trader.go
api/handler_wallet.go
api/utils_test.go
config/config.go
kernel/engine.go

Go Vet: ✅ Good
Tests: ✅ Passed

Fix locally:

go fmt ./...      # Format code
go vet ./...      # Check for issues
go test ./...     # Run tests

⚛️ Frontend Checks

Build & Type Check: ✅ Success

Fix locally:

cd web
npm run build  # Test build (includes type checking)

---

📖 Resources

• Contributing Guidelines
• Migration Guide

Questions? Feel free to ask in the comments! 🙏

---

These checks are advisory and won't block your PR from being merged. This comment is automatically generated from pr-checks-run.yml.

[github-actions]

🤖 Advisory Check Results

These are advisory checks to help improve code quality. They won't block your PR from being merged.

📋 PR Information

Title Format: ✅ Good - Follows Conventional Commits
PR Size: 🟡 Medium (382 lines: +375 -7)

🔧 Backend Checks

Go Formatting: ⚠️ Needs formatting

Files needing formatting

agent/execution_state.go
agent/model_provider_catalog.go
agent/skill_dag_runtime.go
agent/stock.go
api/errors.go
api/handler_trader.go
api/handler_wallet.go
api/utils_test.go
config/config.go
kernel/engine.go

Go Vet: ✅ Good
Tests: ✅ Passed

Fix locally:

go fmt ./...      # Format code
go vet ./...      # Check for issues
go test ./...     # Run tests

⚛️ Frontend Checks

Build & Type Check: ✅ Success

Fix locally:

cd web
npm run build  # Test build (includes type checking)

---

📖 Resources

• Contributing Guidelines
• Migration Guide

Questions? Feel free to ask in the comments! 🙏

---

These checks are advisory and won't block your PR from being merged. This comment is automatically generated from pr-checks-run.yml.

[MarsDoge]

Updated with the deployed backend hotfixes only:

• MCP: retry 504 Gateway Timeout responses.
• MCP forced stream: parse streamed content/reasoning/tool calls directly, handle finish_reason without data:[DONE], and add idle stream timeout reset.
• Telegram: force streaming only for OpenAI provider configs with custom API URLs.
• Tests added for 504 retry, stream tool-call/finish_reason parsing, and Telegram custom OpenAI ForceStream selection.

Local verification: go test ./..., go vet ./..., gofmt/diff check on touched Go files.

Excluded unrelated local dirty changes: api/handler_ai_model.go, web trader UI files, local patch/cache artifacts.

[github-actions]

🤖 Advisory Check Results

These are advisory checks to help improve code quality. They won't block your PR from being merged.

📋 PR Information

Title Format: ✅ Good - Follows Conventional Commits
PR Size: 🟡 Medium (628 lines: +597 -31)

🔧 Backend Checks

Go Formatting: ⚠️ Needs formatting

Files needing formatting

agent/execution_state.go
agent/model_provider_catalog.go
agent/skill_dag_runtime.go
agent/stock.go
api/errors.go
api/handler_trader.go
api/handler_wallet.go
api/utils_test.go
config/config.go
kernel/engine.go

Go Vet: ✅ Good
Tests: ✅ Passed

Fix locally:

go fmt ./...      # Format code
go vet ./...      # Check for issues
go test ./...     # Run tests

⚛️ Frontend Checks

Build & Type Check: ✅ Success

Fix locally:

cd web
npm run build  # Test build (includes type checking)

---

📖 Resources

• Contributing Guidelines
• Migration Guide

Questions? Feel free to ask in the comments! 🙏

---

These checks are advisory and won't block your PR from being merged. This comment is automatically generated from pr-checks-run.yml.