Route PR page metadata by repo host

Co-authored-by: Orca <help@stably.ai>

notes/host-context-implementation-checklist.md

@@ -270,3 +270,4 @@ Done means: reviewers and future agents can understand the vision, implementatio
 - [x] 2026-06-12: Aligned Automations manual-run disabled states with the backend run-target resolver so saved run contexts now disable Run Now when the project-host setup is missing or not ready, instead of failing after dispatch. Verified with focused automation availability tests, targeted oxlint, full `pnpm run typecheck`, and `git diff --check`.
 - [x] 2026-06-12: Routed GitHub drawer label/assignee/reviewer metadata reads through the same task source context as issue/PR mutations, including slug-addressed Project view rows and reviewer request/remove actions, so same-repo multi-host drawers do not fall back to the repo owner or focused runtime. Verified with a focused source-boundary test, targeted oxlint, full `pnpm run typecheck`, and `git diff --check`.
 - [x] 2026-06-13: Tightened runtime project-host setup mutations so older remote servers that advertise `project-host-setup.v1` but not `workspace-run-context.v1` are blocked before setup/clone/create/update/delete RPCs mutate server state; read-only hydration still degrades to repo-derived compatibility rows. Verified with focused repo capability tests, targeted oxlint, full `pnpm run typecheck`, and `git diff --check`.
+- [x] 2026-06-13: Routed the full-page Pull Request metadata popovers through the PR repo owner host instead of ambient focused runtime state, so reviewer, label, and assignee reads align with the existing repo-owned mutation routing. Verified with a focused PR host-boundary test, targeted oxlint, full `pnpm run typecheck`, and `git diff --check`.

src/renderer/src/components/PullRequestPage.tsx

@@ -523,7 +523,6 @@ function PRReviewersPanel({
     reviewRequests: item.reviewRequests
   }))
   const patchWorkItem = useAppStore((s) => s.patchWorkItem)
-  const settings = useAppStore((s) => s.settings)
   const repoOwnerSettings = useAppStore(
     useShallow((s) => getSettingsForRepoRuntimeOwner(s, item.repoId ?? null))
   )
@@ -601,11 +600,12 @@ function PRReviewersPanel({
     open && reviewSlug ? reviewSlug.owner : null,
     open && reviewSlug ? reviewSlug.repo : null,
     reviewerSeedUsers.map((user) => user.login),
-    settings
+    repoOwnerSettings
   )
   const reviewerMetadataByPath = useRepoAssignees(
     open && !reviewSlug ? repoPath : null,
-    open && !reviewSlug ? item.repoId : null
+    open && !reviewSlug ? item.repoId : null,
+    repoOwnerSettings
   )
   const reviewerMetadata = reviewSlug ? reviewerMetadataBySlug : reviewerMetadataByPath
   const displayItem = { ...item, reviewRequests: localReviewRequests }
@@ -4960,6 +4960,9 @@ function GHEditSection({
   const assigneesItemKey = `${item.repoId}\0${item.id}`
   const patchWorkItem = useAppStore((s) => s.patchWorkItem)
   const patchProjectRowContent = useAppStore((s) => s.patchProjectRowContent)
+  const repoOwnerSettings = useAppStore(
+    useShallow((s) => getSettingsForRepoRuntimeOwner(s, item.repoId ?? repoId ?? null))
+  )
   const { isPending, run } = useImmediateMutation()
   // Why: when the dialog opens from a Project view, mutations route through
   // *BySlug IPCs and we must keep `projectViewCache` in sync alongside
@@ -4983,15 +4986,22 @@ function GHEditSection({
   const slugRepo = projectOrigin?.repo ?? null
   const repoLabelsByPath = useRepoLabels(
     projectOrigin ? null : repoPath,
-    projectOrigin ? null : repoId
+    projectOrigin ? null : repoId,
+    repoOwnerSettings
   )
-  const repoLabelsBySlug = useRepoLabelsBySlug(slugOwner, slugRepo)
+  const repoLabelsBySlug = useRepoLabelsBySlug(slugOwner, slugRepo, repoOwnerSettings)
   const repoLabels = projectOrigin ? repoLabelsBySlug : repoLabelsByPath
   const repoAssigneesByPath = useRepoAssignees(
     projectOrigin ? null : repoPath,
-    projectOrigin ? null : repoId
+    projectOrigin ? null : repoId,
+    repoOwnerSettings
+  )
+  const repoAssigneesBySlug = useRepoAssigneesBySlug(
+    slugOwner,
+    slugRepo,
+    assignees,
+    repoOwnerSettings
   )
-  const repoAssigneesBySlug = useRepoAssigneesBySlug(slugOwner, slugRepo, assignees)
   const repoAssignees = projectOrigin ? repoAssigneesBySlug : repoAssigneesByPath
 
   // Why: sync local assignees when item changes or when the detail fetch

src/renderer/src/components/pull-request-page-host-boundary.test.ts

@@ -0,0 +1,43 @@
+import { readFileSync } from 'node:fs'
+import { join } from 'node:path'
+import { describe, expect, it } from 'vitest'
+
+const COMPONENT_ROOT = __dirname
+
+function componentSource(relativePath: string): string {
+  return readFileSync(join(COMPONENT_ROOT, relativePath), 'utf8')
+}
+
+function sourceBetween(source: string, startPattern: string, endPattern: string): string {
+  const start = source.indexOf(startPattern)
+  expect(start).toBeGreaterThanOrEqual(0)
+  const end = source.indexOf(endPattern, start + startPattern.length)
+  expect(end).toBeGreaterThan(start)
+  return source.slice(start, end)
+}
+
+describe('PullRequestPage host boundaries', () => {
+  it('routes reviewer metadata and mutations through the PR repo owner host', () => {
+    const source = componentSource('PullRequestPage.tsx')
+    const section = sourceBetween(source, 'function PRReviewersPanel', 'function isPRFileViewed')
+
+    expect(section).toContain('getSettingsForRepoRuntimeOwner(s, item.repoId ?? null)')
+    expect(section).toContain('useRepoAssigneesBySlug(')
+    expect(section).toContain('repoOwnerSettings')
+    expect(section).toContain('useRepoAssignees(')
+    expect(section).toContain('repoOwnerSettings')
+    expect(section).toContain('getActiveRuntimeTarget(repoOwnerSettings)')
+  })
+
+  it('routes PR edit metadata through the same repo owner host as mutations', () => {
+    const source = componentSource('PullRequestPage.tsx')
+    const section = sourceBetween(source, 'function GHEditSection', 'function GHCommentComposer')
+
+    expect(section).toContain('getSettingsForRepoRuntimeOwner(s, item.repoId ?? repoId ?? null)')
+    expect(section).toContain('useRepoLabels(')
+    expect(section).toContain('useRepoLabelsBySlug(slugOwner, slugRepo, repoOwnerSettings)')
+    expect(section).toContain('useRepoAssignees(')
+    expect(section).toContain('useRepoAssigneesBySlug(')
+    expect(section).toContain('repoOwnerSettings')
+  })
+})