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## Thinking Path
> - Paperclip is the open source app people use to manage AI agents for
work.
> - Operators create tasks in a dialog that includes the assignee and
project fields.
> - Mobile browsers reduce and offset the visual viewport when the
on-screen keyboard opens.
> - The dialog used layout viewport units, so its upper fields could
move off-screen while the user typed.
> - This pull request makes the dialog follow the live visual viewport
and keeps the focused editor visible.
> - The benefit is that operators can see the task context and the field
they edit on mobile devices.
## Linked Issues or Issue Description
**What happened?**
On mobile browsers, opening the keyboard in the new-task dialog could
move the assignee and project fields above the visible screen. The
active editor could also become difficult to see.
**Expected behavior**
The full dialog must stay inside the visible browser area. The active
editor and task controls must remain reachable while the on-screen
keyboard is open.
**Steps to reproduce**
1. Open Paperclip on a mobile browser.
2. Open the new-task dialog.
3. Focus the title or description editor to open the on-screen keyboard.
4. Observe that the upper fields can move outside the visible viewport.
**Paperclip version or commit**
Reproduced before commit `838cdbb325` on `master`.
**Deployment mode**
Local dev (`pnpm dev`) in a mobile browser viewport.
## What Changed
- Read `window.visualViewport` while the dialog is open.
- Apply token-based dialog geometry when the visual viewport is
constrained.
- Keep the focused editor visible after viewport resize and scroll
events.
- Add unit coverage for visual viewport updates and focus scrolling.
- Add Playwright coverage for mobile, tablet, desktop keyboard, and
unconstrained desktop layouts.
## Verification
- `pnpm exec vitest run ui/src/components/NewIssueDialog.test.tsx` — 27
tests passed.
- `pnpm --filter @paperclipai/ui typecheck` — passed.
- `pnpm check:token-gates` — passed with all gates clean.
- `pnpm --filter @paperclipai/ui build-storybook` — passed.
- `pnpm exec playwright test
tests/storybook-visual/new-issue-dialog-viewport.spec.ts --config
tests/storybook-visual/playwright.config.ts` — 4 tests passed.
## Risks
- Low risk. The custom geometry only activates when
`visualViewport.height` is less than `window.innerHeight`.
- Browsers without the Visual Viewport API keep the existing dialog
primitive behavior.
- The browser test checks hit targets and visible bounds at mobile,
tablet, and desktop widths.
> For core feature work, check [`ROADMAP.md`](ROADMAP.md) first and
discuss it in `#dev` before opening the PR. Feature PRs that overlap
with planned core work may need to be redirected — check the roadmap
first. See `CONTRIBUTING.md`.
## Model Used
- OpenAI Codex, GPT-5. The session used reasoning, repository tools,
shell execution, and browser automation. The service did not expose the
context-window size.
## Checklist
- [x] I have included a thinking path that traces from project context
to this change
- [x] I have specified the model used (with version and capability
details)
- [x] I have checked ROADMAP.md and confirmed this PR does not duplicate
planned core work
- [x] I have searched GitHub for duplicate or related PRs and linked
them above
- [x] I have either (a) linked existing issues with `Fixes: #` / `Closes
#` / `Refs #` OR (b) described the issue in-PR following the relevant
issue template
- [x] I have not referenced internal/instance-local Paperclip issues or
links (only public GitHub `#NNN` / `github.com/paperclipai/paperclip`
URLs)
- [x] My branch name describes the change (e.g. `docs/...`, `fix/...`)
and contains no internal Paperclip ticket id or instance-derived details
- [x] I have run tests locally and they pass
- [x] I have added or updated tests where applicable
- [x] I have updated relevant documentation to reflect my changes
- [x] I have considered and documented any risks above
- [x] All Paperclip CI gates are green
- [x] Greptile is 5/5 with no open P2s, recommendations, or follow-ups
- [x] I will address all Greptile and reviewer comments before
requesting merge
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Co-authored-by: Paperclip <noreply@paperclip.ing>
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