[codex] UI and dev ops quality-of-life (#6384)

## Thinking Path

> - Paperclip operators spend most of their time scanning the board,
inbox, sidebar, and local dev status surfaces
> - Small UI and dev-ops frictions make repeated operator workflows feel
slower than they need to be
> - The working branch contained several independent quality-of-life
improvements mixed with larger cloud work
> - Grouping these smaller UI/dev-ops changes together keeps review
overhead reasonable without merging them into feature PRs
> - This pull request collects the operator-facing QoL polish into one
standalone branch
> - The benefit is a cleaner board navigation and local dev recovery
experience without depending on cloud upstream sync

## What Changed

- Relaxed forced 44px touch targets for small inline widgets.
- Fixed mobile mention menu scrolling and sidebar spacing on
touch/mobile layouts.
- Synced inbox hover state with j/k selection.
- Moved plugin sidebar entries into the Work section.
- Added manual dev-server restart action/banner behavior.
- Logged plugin bridge 502 causes for better diagnosis.

## Verification

- `pnpm install --frozen-lockfile --ignore-scripts`
- `pnpm --filter @paperclipai/plugin-sdk build`
- `pnpm exec vitest run ui/src/components/MarkdownEditor.test.tsx
ui/src/components/Sidebar.test.tsx
ui/src/components/SidebarProjects.test.tsx ui/src/pages/Inbox.test.tsx
ui/src/components/DevRestartBanner.test.tsx
server/src/__tests__/dev-server-status.test.ts
server/src/__tests__/health-dev-server-token.test.ts
server/src/__tests__/plugin-routes-authz.test.ts` initially failed only
because plugin SDK `dist` was not built in the fresh worktree.
- Rerun after build: `pnpm exec vitest run
server/src/__tests__/plugin-routes-authz.test.ts` passed.
- The remaining targeted UI/dev-server tests passed on the first
post-install run.

## Visual Evidence

- Sidebar layout and plugin Work section: ![Sidebar
desktop](https://raw.githubusercontent.com/paperclipai/paperclip/pap-9861-ui-dev-qol/docs/pr-screenshots/pr-6384/sidebar-desktop.png)
- Inbox/task row selection and hover-state surface: ![Inbox rows
desktop](https://raw.githubusercontent.com/paperclipai/paperclip/pap-9861-ui-dev-qol/docs/pr-screenshots/pr-6384/inbox-rows-desktop.png)
- Dev restart banner desktop: ![Dev restart banner
desktop](https://raw.githubusercontent.com/paperclipai/paperclip/pap-9861-ui-dev-qol/docs/pr-screenshots/pr-6384/dev-restart-banner-desktop.png)
- Dev restart banner mobile: ![Dev restart banner
mobile](https://raw.githubusercontent.com/paperclipai/paperclip/pap-9861-ui-dev-qol/docs/pr-screenshots/pr-6384/dev-restart-banner-mobile.png)

## Risks

- Mostly UI/dev ergonomics with low data risk.
- Sidebar and inbox changes touch frequently used navigation surfaces,
so visual review on desktop/mobile is still useful.

> 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-based coding agent with local shell/git/tool use.
Exact hosted model ID and context-window size are not exposed by the
local Paperclip adapter runtime.

## 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 run tests locally and they pass
- [x] I have added or updated tests where applicable
- [x] If this change affects the UI, I have included before/after
screenshots
- [x] I have updated relevant documentation to reflect my changes
- [x] I have considered and documented any risks above
- [x] I will address all Greptile and reviewer comments before
requesting merge

---------

Co-authored-by: Paperclip <noreply@paperclip.ing>

ui/src/index.css

@@ -183,7 +183,18 @@
     min-height: 44px;
   }
 
-  [data-slot="toggle"] {
+  /* Small inline widgets keep their design size on touch devices —
+     forcing 44px here stretches checkboxes, chip menus, and icon buttons
+     that live inside dense rows (sidebar headers, issue rows, filter
+     popovers). The surrounding row provides the touch area. */
+  [data-slot="toggle"],
+  [data-slot="checkbox"],
+  [data-slot="icon-button"],
+  [data-size="xs"],
+  [data-size="icon-xs"],
+  [data-size="icon-sm"],
+  input[type="checkbox"],
+  input[type="radio"] {
     min-height: 0;
   }
 }