refactor(server): unify instance httpapi middleware routing

Unify declared instance HTTP API endpoints under typed middleware routing, including event streaming and PTY WebSocket connect handling.\n\nPreserve PTY connect compatibility by checking missing PTYs before parsing optional cursor and ticket query fields, with regression coverage.

packages/opencode/test/server/httpapi-workspace.test.ts

@@ -9,6 +9,7 @@ import { WorkspaceID } from "../../src/control-plane/schema"
 import type { WorkspaceAdapter } from "../../src/control-plane/types"
 import { Workspace } from "../../src/control-plane/workspace"
 import { WorkspacePaths } from "../../src/server/routes/instance/httpapi/groups/workspace"
+import { EventPaths } from "../../src/server/routes/instance/httpapi/groups/event"
 import { Session } from "@/session/session"
 import * as Log from "@opencode-ai/core/util/log"
 import { Server } from "../../src/server/server"
@@ -344,6 +345,7 @@ describe("workspace HttpApi", () => {
         proxied.push(request)
         const url = new URL(request.url)
         if (url.pathname === "/base/global/event") return eventStreamResponse()
+        if (url.pathname === "/base/event") return eventStreamResponse()
         if (url.pathname === "/base/sync/history") return Response.json([])
         return new Response(
           JSON.stringify({
@@ -413,6 +415,18 @@ describe("workspace HttpApi", () => {
         ])
         expect(forwarded[0]?.headers).not.toHaveProperty("x-opencode-directory")
         expect(forwarded[0]?.headers).not.toHaveProperty("x-opencode-workspace")
+
+        const eventURL = new URL(`http://localhost${EventPaths.event}`)
+        eventURL.searchParams.set("workspace", workspace.id)
+        const eventResponse = yield* request(eventURL.toString(), dir)
+        expect(eventResponse.status).toBe(200)
+        expect(eventResponse.headers.get("content-type")).toContain("text/event-stream")
+        if (!eventResponse.body) throw new Error("missing proxied event response body")
+        const eventReader = eventResponse.body.getReader()
+        const event = yield* Effect.promise(() => eventReader.read())
+        yield* Effect.promise(() => eventReader.cancel())
+        expect(new TextDecoder().decode(event.value)).toContain("server.connected")
+        expect(proxied.some((item) => new URL(item.url).pathname === "/base/event")).toBe(true)
       } finally {
         void remote.stop(true)
         yield* request(WorkspacePaths.remove.replace(":id", workspace.id), dir, { method: "DELETE" })