merge: fix opencode model switching runtime refresh

.project-docs/30-worklog/tasks/20260821-integrate-model-switch-fix-8f2d6c41.md

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+# Task: Integrate model switch runtime fix into main
+
+## Identity
+
+- Task ID: 20260821-integrate-model-switch-fix-8f2d6c41
+- Mode: Integration
+- Branch: main
+- Worktree: D:\Datas\OthersProjects\makelore
+- Base commit: 605fef417fe2e7a5d23d4994fbd109cdfb38efcb
+- Owner: codex
+- Status: Blocked
+
+## Scope
+
+- Merge verified source commit `cce7722` into local `main` with normal
+  no-fast-forward history.
+- Integrate the OpenCode Session model wire correction and fresh-runtime local
+  proxy Host API token binding without changing partner Agent hot-add behavior.
+- Reconcile the source task's accepted promotion candidate into canonical
+  current state, architecture/data flow, evidence, and the pending real-client
+  smoke commitment.
+- Preserve the separately owned untracked packaging task record unchanged.
+
+## Intent And Constraints
+
+- Keep page selection and `/models` / `/model` on OpenCode's native per-Session
+  mutation and prevent false runtime-refresh requirements for an owned fresh
+  runtime that already uses the current Main-owned proxy token.
+- Preserve attached/unknown fail-closed behavior, sticky timeout/partial-write
+  uncertainty, true provider/model shape refreshes, and existing Agent runtime
+  acceptance rules.
+- Treat the source feature task record as read-only source history. Do not edit
+  it; keep integration notes in this task record and canonical documents.
+- Do not modify or commit
+  `.project-docs/30-worklog/tasks/20260819-package-learning-off-115-9c4d.md`.
+- Merge only into local `main`; do not push, package, or claim a rebuilt-client
+  smoke that has not been run.
+
+## Outcome
+
+- With explicit user authorization, force-released the blocked legacy
+  integration ownership `20260820-integrate-remember-password-5d7e3a1c` and
+  adopted the known dirty `main` worktree without modifying its separately
+  owned untracked packaging task record.
+- Merged source commit `cce7722` into the local `main` integration tree with
+  normal no-fast-forward history and no code conflicts. The source task record
+  remains read-only source history and was not added to the canonical tree.
+- Integrated the OpenCode 1.18.9 Session model `id` wire mapping, current Host
+  API token injection for a fresh managed local-proxy runtime, and the
+  fresh/attached runtime acceptance distinction. Partner Agent hot-add and true
+  provider/runtime refresh semantics are unchanged.
+- Promoted the accepted source candidate into current state, module ownership,
+  data flow, evidence, and a pending rebuilt-client local smoke commitment.
+- Kept the merge local. No push, package, paid-provider request, or claim of a
+  real rebuilt-client smoke was made.
+
+## Verification
+
+- Integrated focused OpenCode client/provider config/provider route/OpenCode
+  route suite — 4 files, 171 tests passed.
+- `corepack pnpm run typecheck` — passed.
+- `corepack pnpm run lint:check` — passed with 0 errors and 6 existing warnings
+  in unrelated Renderer files.
+- The first parallel full-test/build attempt exhausted worker/V8 process
+  resources: Vitest reported one unexpected worker exit after 176 files / 2047
+  tests passed, and the concurrent Vite process terminated with a V8 fatal
+  check. Rerunning the commands independently resolved the execution failure.
+- Sequential `corepack pnpm test` — 177 files, 2074 tests passed.
+- Sequential `corepack pnpm run build:vite` — passed for
+  Renderer/Main/Preload/utility; only existing dynamic-import and large-chunk
+  advisory warnings were reported.
+- `node ./node_modules/@playwright/test/cli.js test
+  tests/e2e/opencode-multichat-runtime.spec.ts` — 1 Electron E2E passed. An
+  earlier `pnpm exec playwright` attempt selected the separate `playwright` CLI
+  and failed during collection because the fixture used `@playwright/test`; no
+  test body ran in that attempt.
+- `git diff --check` — passed with configured LF-to-CRLF notices only.
+- Task-aware documentation drift remains blocked solely because the explicitly
+  adopted, pre-existing untracked
+  `.project-docs/30-worklog/tasks/20260819-package-learning-off-115-9c4d.md`
+  is another task's owned record. It was not modified, staged, or committed.
+  The checker also lists the expected nine merged source code/test files as
+  non-document changes.
+
+## Follow-ups
+
+- Build and relaunch a desktop application containing source `cce7722`, then
+  repeat page-selector and `/model` switching against the real local OpenCode
+  runtime without a manual runtime restart. This is recorded in canonical
+  commitments and remains outside this source-only integration.
+- Resolve the project-docs drift-check handling for the explicitly adopted
+  pre-existing foreign task record before marking this integration complete or
+  releasing its ownership. Do not delete, edit, move, or commit that record as
+  part of this integration.
+
+## Promotion Candidates
+
+- Applied the source task's Session model wire and fresh-runtime local-proxy
+  token candidate; none remain pending for this integration.