refactor: ai sdk and http server in core

[minorcell]

No description provided.

[codecov]

Codecov Report

❌ Patch coverage is 48.70420% with 1148 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
packages/core/src/server/router/api_routes.ts	29.79%	370 Missing ⚠️
...ackages/core/src/server/handler/session_manager.ts	45.63%	299 Missing ⚠️
packages/core/src/server/utils/http.ts	29.21%	172 Missing ⚠️
packages/core/src/server/handler/workspace.ts	25.29%	127 Missing ⚠️
packages/core/src/server/utils/sse.ts	27.08%	70 Missing ⚠️
packages/core/src/server/http_server.ts	63.24%	43 Missing ⚠️
packages/tui/src/web/run_web_command.ts	54.76%	19 Missing ⚠️
packages/core/src/runtime/defaults.ts	85.08%	14 Missing and 3 partials ⚠️
packages/core/src/server/handler/auth.ts	83.69%	15 Missing ⚠️
packages/core/src/runtime/history_index.ts	38.46%	8 Missing ⚠️
... and 2 more

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