feat: fork-aware issue/PR listing & OpenCode startup loading indicator (#1061)

* Add design spec: OpenCode readiness loading indicator

* Add implementation plan: OpenCode readiness loading indicator

* feat: add useOpenCodeReadiness hook

* feat: add i18n keys for common.loading

* feat: add loading state to ModelSelector

* feat: add loading state to AgentSelector

* feat: add loading state to ModelControls chat selectors

* update package-lock

* feat(github): add shared fork detection utility

* feat(github): make issue listing fork-aware

* feat(github): make PR listing fork-aware

* feat(types): add sourceRepo to issue/PR summary types

* feat(ui): add source badges to GitHub integration dialog

* feat(ui): add source badges to issue/PR picker dialogs

* feat(github): pass headRemote in PR creation for fork support

* feat(ui): add source→target label in PR tab for fork workflows

* fix(github): allow PR section on base branch when upstream remote exists

* fix(github): show PR section on any branch including main for fork→upstream PRs

* fix(github): allow PullRequestSection to render on base branch when upstream remote exists

* feat(github): auto-detect upstream repo for fork→upstream PR creation

- Add GET /api/github/repo/upstream endpoint to discover fork's upstream
- Fix PullRequestSection canShow to allow PR creation on base branch when repo is a fork
- Add virtual upstream target in remote dropdown (no explicit upstream remote needed)
- Add targetRepo parameter to /api/github/pr/create for direct upstream targeting
- Add repoUpstream() API client method and GitHubRepoUpstreamResult type

* feat(github): auto-detect upstream repo for fork→upstream PR creation

- Add GET /api/github/repo/upstream endpoint to discover fork's upstream
- Fix PullRequestSection canShow to allow PR creation on base branch when repo is a fork
- Add virtual upstream target in remote dropdown (no explicit upstream remote needed)
- Add targetRepo parameter to /api/github/pr/create for direct upstream targeting
- Add repoUpstream() API client method and GitHubRepoUpstreamResult type

* fix: complete fork→upstream PR workflow

- Server: return defaultBranch from /api/github/repo/upstream endpoint
- Server: fix cross-repo head ref construction (compare repos, not remote names)
- Server: filterActiveRemoteBranches checks all remotes, not just origin
- UI: set targetBaseBranch to upstream's default branch when using detected upstream
- UI: include all remote branches in base branch dropdown when using detected upstream
- UI: skip base===head check for cross-repo PRs (same branch name on different repos is valid)
- Types: add defaultBranch to GitHubRepoUpstreamResult

* chore: delete superpowers folder

* feat: add (local)/(remote) labels to PR branch display and adapt Repository button to selected remote

* feat: Repository button adapts to selected remote (upstream vs origin)

* fix: complete fork→upstream PR feature gaps

Server:
- Extend /api/github/repo/upstream to return defaultBranchSha and remoteName
- Reuse headRepo result instead of redundant resolveGitHubRepoFromDirectory call
- Return clear error when headRepo is null (invalid GitHub URL)

UI:
- Add upstream's default branch to availableBaseBranches when using detected upstream
- Use upstream's default branch SHA in git log for generate description (fixes 'No commits found in range main...main')
- Show qualified names (owner/repo · branch) in base branch dropdown when using detected upstream

Types:
- Add defaultBranchSha and remoteName to GitHubRepoUpstreamResult

* fix: move detectedUpstream state before availableBaseBranches to fix temporal dead zone

* fix: fetch upstream branches from GitHub API for base branch dropdown

- Add GET /api/github/repo/branches endpoint to fetch branches via Octokit
- Add repoBranches() to GitHub API client and interface
- Fetch upstream branches on detection and store in upstreamBranches state
- Include upstreamBranches in availableBaseBranches when using detected upstream
- Re-add availableBaseBranches memo and auto-correction effect that were lost
- Remove unnecessary qualified names from dropdown (upstream is already selected)

* fix: restore prStatusKey and statusEntry declarations lost during refactor

* fix: cleanly re-apply all fork→upstream PR UI changes

Restored PullRequestSection.tsx from clean base and re-applied:
- Expand detectedUpstream type with defaultBranch, defaultBranchSha, remoteName
- Add upstreamBranches state and fetch on upstream detection
- Include upstream branches in availableBaseBranches when using detected upstream
- Use upstream default branch SHA in generate description (fixes 'No commits found')
- Adapt Repository button URL to selected remote
- Add (local)/(remote)/(upstream) labels to branch display

* fix: move detectedUpstream/upstreamBranches before availableBaseBranches to fix TDZ

* style: add pill badge styling to upstream repo source labels

* fix: don't cache error PR status responses, allow force-bypass of server cache

* fix: resolve PR status cache bugs, stale directory fallback, and upstream re-detection

* fix: keep collapse button visible when scrolling long user messages

- Collapse button now sticks to top of scrollable user message content instead of scrolling away

* fix: checkbox focus ring blends into sidebar background

* fix: polish fork PR follow-ups

* fix: remove user message collapse artifact

* fix: tighten fork PR internals

* fix: check all remotes for fork PR status

* fix: recover sidebar PR status misses

---------

Signed-off-by: Islam Nofl <islamnofl.official@gmail.com>
Co-authored-by: Bohdan Triapitsyn <artmore@protonmail.com>

packages/ui/src/components/session/GitHubPrPickerDialog.tsx

@@ -23,7 +23,7 @@ import { useProjectsStore } from '@/stores/useProjectsStore';
 import { useUIStore } from '@/stores/useUIStore';
 import { useGitHubAuthStore } from '@/stores/useGitHubAuthStore';
 import { renderMagicPrompt } from '@/lib/magicPrompts';
-import type { GitHubPullRequestContextResult, GitHubPullRequestSummary, GitHubPullRequestsListResult } from '@/lib/api/types';
+import type { GitHubPullRequestContextResult, GitHubPullRequestSummary, GitHubPullRequestsListResult, GitHubRepoSelector } from '@/lib/api/types';
 import { useI18n } from '@/lib/i18n';
 
 const parsePrNumber = (value: string): number | null => {
@@ -195,7 +195,7 @@ export function GitHubPrPickerDialog({
 
   const directNumber = React.useMemo(() => parsePrNumber(query), [query]);
 
-  const attachPr = React.useCallback(async (prNumber: number) => {
+  const attachPr = React.useCallback(async (prNumber: number, sourceRepo?: GitHubRepoSelector | null) => {
     if (!projectDirectory) {
       toast.error(t('session.githubPrPicker.error.noActiveProject'));
       return;
@@ -211,6 +211,7 @@ export function GitHubPrPickerDialog({
       const context = await github.prContext(projectDirectory, prNumber, {
         includeDiff,
         includeCheckDetails: false,
+        sourceRepo,
       });
 
       if (context.connected === false) {
@@ -348,18 +349,23 @@ export function GitHubPrPickerDialog({
 
           {filtered.map((pr) => (
             <div
-              key={pr.number}
+              key={`${pr.sourceRepo?.owner ?? ''}-${pr.sourceRepo?.repo ?? ''}-${pr.number}`}
               className={cn(
                 'group flex items-center gap-2 py-1.5 hover:bg-interactive-hover/30 rounded transition-colors cursor-pointer',
                 loadingPrNumber === pr.number && 'bg-interactive-selection/30'
               )}
-              onClick={() => void attachPr(pr.number)}
+              onClick={() => void attachPr(pr.number, pr.sourceRepo)}
             >
               <div className="flex-1 min-w-0 ml-0.5">
                 <p className="typography-small text-foreground truncate">
                   <span className="text-muted-foreground mr-1">#{pr.number}</span>
                   {pr.title}
                 </p>
+                {pr.sourceRepo?.source === 'upstream' ? (
+                  <span className="typography-micro px-1 py-0.5 rounded bg-status-info/10 text-status-info">
+                    {pr.sourceRepo.owner}/{pr.sourceRepo.repo}
+                  </span>
+                ) : null}
                 <p className="typography-meta text-muted-foreground truncate">{pr.head} → {pr.base}</p>
               </div>