chore: drop OPENCODE_API_KEY and REQUIRE_PAID from e2e workflow

All e2e tests now use the mock LLM server or noReply seeding — no test
makes real provider calls. Remove the API key, model override, and
paid-model guard from the CI workflow and seed script.

Fixes the Windows CI failure where OPENCODE_API_KEY was unavailable.

Author: kitlangton

.github/workflows/test.yml

@@ -100,9 +100,6 @@ jobs:
         run: bun --cwd packages/app test:e2e:local
         env:
           CI: true
-          OPENCODE_API_KEY: ${{ secrets.OPENCODE_API_KEY }}
-          OPENCODE_E2E_MODEL: opencode/claude-haiku-4-5
-          OPENCODE_E2E_REQUIRE_PAID: "true"
         timeout-minutes: 30
 
       - name: Upload Playwright artifacts

packages/opencode/script/seed-e2e.ts

@@ -2,7 +2,6 @@ const dir = process.env.OPENCODE_E2E_PROJECT_DIR ?? process.cwd()
 const title = process.env.OPENCODE_E2E_SESSION_TITLE ?? "E2E Session"
 const text = process.env.OPENCODE_E2E_MESSAGE ?? "Seeded for UI e2e"
 const model = process.env.OPENCODE_E2E_MODEL ?? "opencode/gpt-5-nano"
-const requirePaid = process.env.OPENCODE_E2E_REQUIRE_PAID === "true"
 const parts = model.split("/")
 const providerID = parts[0] ?? "opencode"
 const modelID = parts[1] ?? "gpt-5-nano"
@@ -12,7 +11,6 @@ const seed = async () => {
   const { Instance } = await import("../src/project/instance")
   const { InstanceBootstrap } = await import("../src/project/bootstrap")
   const { Config } = await import("../src/config/config")
-  const { Provider } = await import("../src/provider/provider")
   const { Session } = await import("../src/session")
   const { MessageID, PartID } = await import("../src/session/schema")
   const { Project } = await import("../src/project/project")
@@ -27,19 +25,6 @@ const seed = async () => {
         await Config.waitForDependencies()
         await ToolRegistry.ids()
 
-        if (requirePaid && providerID === "opencode" && !process.env.OPENCODE_API_KEY) {
-          throw new Error("OPENCODE_API_KEY is required when OPENCODE_E2E_REQUIRE_PAID=true")
-        }
-
-        const info = await Provider.getModel(ProviderID.make(providerID), ModelID.make(modelID))
-        if (requirePaid) {
-          const paid =
-            info.cost.input > 0 || info.cost.output > 0 || info.cost.cache.read > 0 || info.cost.cache.write > 0
-          if (!paid) {
-            throw new Error(`OPENCODE_E2E_MODEL must resolve to a paid model: ${providerID}/${modelID}`)
-          }
-        }
-
         const session = await Session.create({ title })
         const messageID = MessageID.ascending()
         const partID = PartID.ascending()