fix(web): show message copy buttons on touch devices - #11020

Merges `pingdotgg/t3code` `2a3035353..0f602b3` (16 commits) into the
fork.

- **Landed:** 283 files (`HEAD^1..HEAD`) against 277 in the upstream
range — `merge-stats.mjs` reports an exact 277/277 file match, so
nothing in the range was dropped and nothing extra came in. The six over
are three typecheck fixes and three fork docs, both listed below. Fork
delta 733 files (`HEAD^2..HEAD`).
- **Conflicts:** 6 files, all on one upstream feature (pingdotgg#10839, linking
several pull requests to a thread). Resolutions in
`docs/fork/upstream-merge-log.md`.
- **Sweep:** 13 owned-concern hits, all `infra/relay/**`
FCM/Android-push files under the decided-out `cloud-relay-connect`
concern. Inherited in tree, adopted by nothing.
- **Unsupported methods:** 0 ADD, 0 DROP — no
`packages/contracts/src/rpc.ts` edit needed.

## What upstream shipped

### Usable as-is against Moatless

Pure client work, no backend involvement — these are live the moment
this merges.

- **pingdotgg#11020** message copy buttons show on touch devices.
- **pingdotgg#11018** middle-click pastes in the terminal on Linux.
- **pingdotgg#10869** expanded images zoom and pan.
- **pingdotgg#11002** the composer uses the available space for model names.
- **pingdotgg#10981** duplicate tool-call commands can be expanded independently.
- **pingdotgg#10947** provider settings grow a bulk model toggle.
- **pingdotgg#10609** the PR list's diff counts return to the top right.
- **pingdotgg#11022** remote projects open in Zed
(`packages/contracts/src/editor.ts` plus the desktop shell — the fork
ships both).
- **pingdotgg#10998 / pingdotgg#10983 / pingdotgg#10964** three Android glass/overlap fixes in
`apps/mobile`.

### Unsupported in Moatless — needs backend implementation

- **pingdotgg#10839 — several pull requests per thread.** This is the substantive
decision in the merge. Upstream now carries `thread.pullRequests:
ThreadPullRequestLink[]`, `packages/shared/src/threadPullRequests.ts`,
and a `ThreadPullRequestBadgeControl` pill with its own `pull-requests`
stack tab. That is exactly the equivalent the fork's
`task-bound-pull-request` convergence entry said to re-home its `+N`
menu onto — but it cannot be re-homed yet: Moatless serves no
`pullRequests` array on a thread and does not advertise the new
`threadPullRequests` capability, so upstream's badge would resolve to
nothing and paint an empty pill over a working one. Taking `theirs`
would have silently deleted live fork behaviour.

**Resolution:** upstream's implementation landed whole, and the two
presentations are switched on `useSupportsMultiplePullRequests` —
upstream's badge and stack where the server advertises the capability,
the fork's binding-derived pill and `+N` menu where it does not.
Additive, no prop threading, and it re-homes itself the day the backend
advertises. `docs/fork/inventory.json` and `docs/fork/gaps.md` are
updated with the switch and with the exact deletion list for when that
happens.

**To close it:** serve `thread.pullRequests` on
`OrchestrationThread`/`OrchestrationThreadShell` from `task_bindings`,
and report `capabilities.threadPullRequests: true`.

- **pingdotgg#10870 — find threads by linked pull request.** Search terms come
off the same `thread.pullRequests` array, so sidebar and command-palette
search by PR number/URL match nothing here until the array is served.
Closes with pingdotgg#10839.

- **pingdotgg#10875 — navigate, merge and rebase GitHub stacks.** Adds two RPC
methods, `pullRequests.stack` and `pullRequests.linkedThreads`, which
the Moatless backend does not dispatch. Both are already covered by the
shared `PullRequestRpcError` union, so the client decodes the refusal
correctly and the stack UI stays inert — no contract change needed.
Implementing the two methods is what turns it on.

- **pingdotgg#10416 — Android agent notifications and ongoing activity.** Rides
FCM through `infra/relay`, which is part of the decided-out
`cloud-relay-connect` concern (being removed with Clerk). Inherited in
tree, not adopted.

### Backend behaviour worth reproducing in Moatless

- **pingdotgg#11007 — recent PR reads survive a server restart.** Upstream added
`apps/server/src/pullRequest/PullRequestReadCache.ts`, persisting which
pull requests a user has already read so a restart does not re-mark the
whole list unread. Moatless owns this surface itself, so nothing in this
repository holds it open — recorded so whoever touches the backend's PR
read state knows the answer exists upstream.

## Verification

`verify.mjs`, seven of eight green: `duplicate-adds`, `tripwires`,
`resolution-check`, `unsupported-methods`, `fmt:check`, `lint`,
`typecheck`.

`test` is red on `@t3tools/desktop` alone —
`scripts/browser-secret-native.test.mjs > bundled libsecret helper`
fails to compile because `libsecret-1` is not installed in this sandbox.
**Pre-existing environment gap, not merge-introduced:** it is already an
entry in `docs/fork/gaps.md`, and `git diff --name-only HEAD^1 HEAD |
grep browser-secret` is empty. 100 of 102 desktop files pass. Four
packages did not finish under `vp run -r test` (`@t3tools/mobile`, `t3`,
`@t3tools/web`, `t3code-relay`) and all four pass when run alone, which
is parallel load rather than the merge.

Three typecheck failures were fixed in the merge commit, all fork-only
web code that upstream's widened shared types reached:
`sandboxControl.placement.test.tsx` needed the two new `RightPanelTabs`
props, and `useSandboxAvailability.ts` / `useSandboxDetail.ts` needed
`isSuccess` threaded through now that `EnvironmentQueryView` carries it.

Nothing is unresolved.

---
Moatless task:
https://moatless.soaplabstest.com/tasks/db1b3cbe-4401-441b-bbec-6b0c725c93ce

## What's Changed
* fix(web): restore pr list diff counts to the top right by @maria-rcks in pingdotgg/t3code#10609
* fix(web): show message copy buttons on touch devices by @maria-rcks in pingdotgg/t3code#11020
* fix(web): middle-click pastes in the terminal on Linux by @maria-rcks in pingdotgg/t3code#11018
* fix(editors): open remote projects in Zed by @maria-rcks in pingdotgg/t3code#11022
* feat: add blue and orange diff color palette by @maria-rcks in pingdotgg/t3code#10671
* fix(server): resolve project identity before legacy pr relinks by @t3-code[bot] in pingdotgg/t3code#11045


**Full Changelog**: pingdotgg/t3code@v0.0.41-nightly.20260910.1473...v0.0.41-nightly.20260910.1486

Upstream release: https://github.com/pingdotgg/t3code/releases/tag/v0.0.41-nightly.20260910.1486