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## Thinking Path > - Paperclip is the open source app people use to manage AI agents for work. > - People read tasks and send instructions from phones as well as desktop browsers. > - The mobile footer let page text show through its labels, and small text fields made Safari zoom on focus. > - Small scroll changes made the footer switch direction, and its changing page padding moved the conversation. > - Task pages also showed comments before question cards and run history arrived, so the composer and reading position moved again. > - Document links also used native navigation, which reset the reading position or reloaded a task through its UUID URL. Desktop tabs were crowded in the mobile drawer. > - This pull request keeps navigation steady, opens documents in the mounted task, and gives mobile readers a full-height panel with a vertical tab selector. > - The benefit is a stable task view and smoother scrolling on mobile. ## Linked Issues or Issue Description **What happened?** The mobile footer was translucent. Safari zoomed when a person focused a small text field. The footer switched abruptly while scrolling. A large task could show saved comments, then move the page again when a question card or run history arrived. In a local test with delayed responses, a late question moved the mobile composer by about 374 pixels. Opening a plan from the feed could reset the view or reload the task through a UUID link. The mobile document drawer left part of the feed exposed above small desktop tab controls. **Expected behavior** The footer has an opaque surface and moves smoothly after deliberate scrolling. Text fields do not cause automatic focus zoom. A task shows its initial conversation and composer together at the final scroll position. Background refreshes keep the existing conversation visible. Document links open in the mounted task with its existing cache and reading position. Mobile documents fill the viewport, show a clear close button, and offer a vertical list of open tabs. **Steps to reproduce** 1. Open a task with many long comments and a pending question in iOS Safari. 2. Delay its interactions, activity, and runs responses by different amounts. 3. Reload the page and watch the conversation and composer move as each response arrives. 4. Scroll down and back up, including small direction changes and edge bounce. 5. Focus the task composer, search field, and new-task title and description. 6. Open a plan or another task document from the feed, including a link that uses the task UUID. Close the panel and check the reading position. 7. Open several documents on a phone. Switch tabs and close both active and inactive tabs. **Paperclip version or commit** Developed from `1c07b5903` and rebased onto `59015846a`. **Deployment mode** Built from source. Tested in an isolated local test drive with iOS 26.5 Simulator Safari and Chrome. A temporary local proxy delayed independent responses for the layout test. Related work found in the duplicate search: - Refs #14727. It made saved replies appear before supporting history. This PR keeps its parallel requests and narrows the tradeoff in favor of a stable first layout. - Refs #14667. This open PR takes a different approach with per-run placeholders and retries. This PR fixes the observed question/composer movement and mobile navigation behavior. - Refs #13095 and #13597. These earlier fixes added task scroll anchors and skipped transcript waits for scheduled retries. - Refs #6550. Earlier mobile board polish. - Refs #9467. This related open PR changes list and generic tab reflow. The task-pane selector uses a separate component. ## What Changed - Give the mobile footer an opaque semantic surface. - Set a base-size floor for editable text on touch devices to prevent Safari focus zoom. Preserve larger title text. - Share mobile scroll tracking between both layouts. Accumulate scroll distance, ignore edge bounce and changed document bounds, and update once per frame. - Use shared motion tokens for the footer and composer. Keep page padding stable and honor reduced motion. - Wait for the initial question cards, attachments, work products, activity, runtime selection, plan, and relevant transcript history before the first reveal. Skip scheduled retries and older runs outside the initial comment window. - Bound the first reveal to 15 seconds. A stalled supporting request leaves saved conversation and the composer accessible with an explicit loading notice. - Keep concealed mobile history from stretching the document. Keep the composer mounted but concealed until the same reveal. Keep both visible during later refreshes. - Route first and repeated same-task document clicks in place. Recognize UUID and identifier links. Preserve the thread history entry and feed position. Keep modifier clicks, downloads, external links, and classic document behavior. - Give the mobile task panel the full viewport and safe-area padding. Use a visible X and 44-pixel touch controls. Replace the horizontal tab strip with a vertical selector that wraps titles and supports keyboard focus. - Add four interactive Storybook states for a few tabs, long names, many tabs, and the last tab. Reuse the production selector and tab controller. - Add navigation and tab regressions, update first-reveal regressions, and document the behavior in `DESIGN.md`. ## Verification - 392 tests passed across the seven focused task-loading, scroll, mobile-navigation, layout, and composer suites. After review fixes, all 339 tests across the four affected suites passed, including stalled-loading fallback on mobile and desktop and the motion-token catalog. - All 442 focused document, tab, task-thread, and scroll tests pass. The final click-propagation cleanup also passes all 136 task-detail tests. UI typecheck, UI production build, and `pnpm check:token-gates` passed. - All four cases in `artifact-tab-arrival.spec.ts` and `text-attachment-tabs.spec.ts` pass locally, covering desktop and mobile selection, composer focus, document rendering, and downloads of the original bytes. - `pnpm --filter @paperclipai/ui build-storybook` passed. Open the mobile tab stories under `Prototypes/Task detail/Mobile tabs`. - A local diagnostic proxy measured cached plan content at about 250 ms after the first click. The HTML load count and task request count did not change. Feed scroll stayed at the same position. First, repeated, and UUID document links were tested at phone and desktop widths. Task-reference links close their preview before the document reader opens. - In Chrome at desktop and phone widths, the delayed-response task showed one complete reveal. The late question no longer moved an already visible composer. - In iOS Simulator Safari, verified the large-task reload, opaque footer, navigation hide/reveal, and search/new-task/composer focus without automatic zoom. - Full workspace typecheck and build passed. The updated UI also passes typecheck, production build, and token gates. - All 54 checks pass on the final commit `bf5c9914e61833e7cc8794a69d72cf8c7057b952` (two additional checks are intentionally skipped). Greptile reviewed that commit at 5/5, and all review threads are resolved. - Full local `pnpm test:run` was attempted but stopped after server-fixture failures. Embedded PostgreSQL startup failure reproduced in an isolated native-interaction fixture after five startup attempts. The broad run also reported a rapid Slack callback ordering test failure. These server paths are unchanged by this PR, and their CI shards pass on the latest head. The full local suite is not claimed as passing. - A localhost proxy stalled the activity response for 30 seconds. Chrome revealed the available conversation after the 15-second deadline at both desktop and phone widths, kept the composer accessible, and cleared the loading notice when the response arrived. ## Risks Slow initial history requests can delay the first conversation reveal by up to 15 seconds. If that deadline expires, late data can change the available conversation while a loading notice remains visible. The reveal waits only for runs in the initial comment window, and later refreshes do not conceal an existing conversation. The larger editable text can change line wrapping on phones. Mobile navigation and composer motion use shared tokens and respect reduced-motion settings. Mobile tab selection changes the control layout. Document links retain URL history while sharing the task reading position; other tasks and external links keep their normal navigation behavior. I checked `ROADMAP.md`. This is a fix for existing UI behavior. ## Model Used OpenAI GPT-6 in Codex. The runtime does not expose a more specific model ID or context-window size. The agent used reasoning, code editing, terminal tools, and Chrome and iOS Simulator testing. ## 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 --------- Co-authored-by: Paperclip <noreply@paperclip.ing>