Improve developer forge extension surfaces

[rawkode]

Summary

• Makes the forge shell feel more familiar to developers across workspace and repository surfaces: README/Code, Actions, Releases, Config, Issues, Pull requests, Checks, Epics, Kanban/Sprints, Specs/PRDs, BDD Scenarios, and project drilldowns.
• Keeps work navigation scoped correctly for a single-tenant user/org forge, including repo-embedded extension routes, project filters, create flows, command palette results, recents, and mobile Work navigation.
• Adds a shared SDK issue aggregation helper that reads workspace issues through repository-scoped extension installations, treats repos without Issues as empty, and coalesces concurrent repo reads.
• Wires that aggregation into Workspace Home, Inbox, Project Home, Project counts, and command palette issue search so those surfaces no longer depend on the bare workspace list-issues path.
• Labels the desktop icon rail with real accessible names and aria-current state, while keeping the route matching in a typed, tested helper.
• Connects the top-level /repos index to the shared authenticated GraphQL client, restores imported repository rows, and adds a path/name/group finder.
• Adds an Epics roadmap quick filter that shares the existing queue query syntax through q, is:, project:, owner:, label:, priority:, milestone:, and target: filters, keeps keyboard focus scoped to visible cards, and improves board/card/progress accessibility labels.
• Adds a Kanban/Sprints board filter that syncs through q, supports is:, project:, sprint:, issue:, and free-text searches, applies filtered counts across lifecycle, selected sprint issues, and project swimlanes, and adds accessible card labels.
• Adds a Specs workbench filter that syncs through q, supports type:, project:, owner:, status:/is:, tag:, path:, feature:, and free-text searches, filters both active board cards and the detailed PRD/ADR/BDD catalog, and keeps mobile toolbar layout tight.
• Adds an Issues board filter that syncs through q, supports is:/state:/status:, project:, assignee:, author:, label:, priority:, milestone:, workflow:, issue:, and free-text searches, filters active board cards locally, and keeps mobile toolbar layout tight.
• Keeps extension-owned behavior behind WIT/backend operations and avoids adding new frontend /api/ops read surfaces where GraphQL can cover the same query.

Plan

• Continue iterating on this draft PR as the product-focused single-tenant forge improves.
• Keep shared shell behavior in SDK helpers where multiple surfaces need the same extension-backed data.
• Keep UI changes verified in the in-app Browser before handoff; backend/API slices stay covered by focused checks plus the end-to-end smoke.

Validation

• cd frontend && bun test packages/sdk-vue/src/workspace-issues.test.ts
• cd frontend && bun test src/components/side-rail.test.ts
• cd frontend && bun test src/routes/repos-list.test.ts
• cd frontend && bun test ../extensions/first-party/ext_sprints/ui/src/kanban-filter.test.ts
• cd frontend && bun test ../extensions/first-party/ext_docs/ui/src/docs-board-filter.test.ts
• cd frontend && bun test ../extensions/first-party/ext_issues/ui/src/issue-board-filter.test.ts
• extensions/bundler/build-extension.sh extensions/first-party/ext_epics
• extensions/bundler/build-extension.sh extensions/first-party/ext_sprints
• extensions/bundler/build-extension.sh extensions/first-party/ext_docs
• extensions/bundler/build-extension.sh extensions/first-party/ext_issues
• cd frontend && bun run typecheck
• cd frontend && bun run build
• cd frontend && bun test
• git diff --check
• ./start.sh --reset --oneshot
• ./start.sh --reset

Browser Verification

• In-app Browser fresh / verified Home renders Open issues 7, kernel project chips show 2 open issues, the rebuilt bundle has no current-bundle console errors, and there is no horizontal overflow.
• In-app Browser /inbox verified 7 repo-backed issue rows, clicked the comtrya/comtrya repo chip, confirmed the repo query parameter and active chip, and saw no console errors or overflow.
• In-app Browser /r/comtrya/comtrya/p/kernel verified Project Home renders 2 open issues, both kernel issue links, one done epic, and no console errors or overflow.
• In-app Browser command palette search for first verified #1 first issue appears from the repository-backed issue list.
• In-app Browser desktop side rail verified every icon-only route exposes an aria-label, Home starts with aria-current="page", clicking Repositories navigates to /repos, Repositories receives aria-current="page", and no console warnings/errors were emitted.
• In-app Browser /repos verified 4 imported repositories render through the authenticated GraphQL client, the Find a repository control filters dog down to comtrya/dogfood, empty-search copy appears for no matches, and the route has no console warnings/errors or overflow.
• In-app Browser /r/comtrya/dogfood/epics/board?q=project:kernel verified q preloads the board filter, the search input is present, the board narrows to child epic, New epic is the primary create action, and card/progress/board ARIA labels are present with no console warnings/errors.
• In-app Browser locator fill on the Epics board verified typing is:done rawkode updates the URL to q=is%3Adone+rawkode, keeps only the matching epic visible, and the clear action returns the board to both epics and removes q.
• In-app Browser mobile viewport 390x844 verified the Epics board toolbar wraps, the project:kernel filter remains usable, and page width stays within the viewport; remaining horizontal overflow is limited to intentional scroll regions and the existing clone command.
• In-app Browser desktop /r/comtrya/dogfood/sprints verified the new Kanban filter input, project:kernel URL sync, filtered summary 0/1 sprints | 0/1 issues | 1/1 cards, matching Kanban card visibility, clear action, no console warnings/errors, and no desktop overflow.
• In-app Browser mobile viewport 390x820 verified /r/comtrya/dogfood/sprints?q=first%20issue preloads the filter, keeps the input and summary usable, shows the matching issue/card content, and keeps document width inside the viewport; the only reported overflow is the existing repository clone command outside the extension.
• In-app Browser desktop /r/comtrya/dogfood/docs?q=type%3Ascenario verified q preloads the Specs workbench filter, summary reads 1/9 specs | 1/3 projects, the active board and catalog narrow to the BDD scenario, and there are no console warnings/errors or desktop overflow.
• In-app Browser locator fill on the Specs workbench verified typing owner:platform docs updates the URL to q=owner%3Aplatform+docs, narrows the catalog to 3/9 specs | 1/3 projects, and Clear restores all 9 specs while removing q.
• In-app Browser mobile viewport 390x820 verified /r/comtrya/dogfood/docs/scenarios?q=bdd preloads the filter, keeps input/Clear/summary stacked tightly, shows the matching BDD scenario board card, keeps document width inside the viewport, and emits no console warnings/errors.
• In-app Browser desktop /r/comtrya/comtrya/issues/board?q=label%3Akind%3A%3Abug verified q preloads the Issues board filter, summary reads 1/9 issues, subtitle reads 1 of 9 issues on workflow, only #2 second issue is visible, Clear restores all 9 cards and removes q, and there are no console warnings/errors or overflow.
• In-app Browser mobile viewport 390x820 verified /r/comtrya/comtrya/issues/board?q=project%3Akernel preloads the filter, keeps input/Clear/summary stacked tightly, shows 2/9 issues and two matching cards with #1 first issue first, keeps document width inside the viewport, and emits no console warnings/errors.

Notes

• This PR remains draft because the requested improvement loop is still active.
• The in-app Browser control path is working and was used for the latest rendered UI verification.