fix(desktop): enable context menus in the in-app browser

[leoisadev1]

Problem

Right-click in the in-app browser built a context menu against the host renderer. Spellcheck, copy image, copy link, and editing roles missed the page the user clicked.

Changes

Install the native context menu on the host, attached preview webviews, and any popup those guests create. Focus the clicked contents first so Electron editing roles target that guest. Copy image and replace misspelling no-op if the guest is gone. Pass the target frame into popupTemplate when Electron provides one.

Adapted from pingdotgg#10670.

Scope

This PR is desktop context menus only.

Covered here:

• fix(desktop): enable context menus in the browser pingdotgg/t3code#10670 enable context menus in the browser

Still assigned to this handoff, in later PRs:

• client incremental rollover / hidden rendering (perf(web): stop replaying terminal buffers on rollover pingdotgg/t3code#9707 perf(web): stop rendering hidden terminals pingdotgg/t3code#9718 perf(web): speed up terminal snapshots pingdotgg/t3code#9663 perf(web): avoid repeated terminal metadata scans pingdotgg/t3code#9747)
• terminal input (feat(mobile): paste the phone clipboard into the terminal pingdotgg/t3code#9199 fix(web): copy terminal selection with Ctrl+Insert pingdotgg/t3code#8541 fix(web): middle-click pastes in the terminal on Linux pingdotgg/t3code#11018 fix(web): honor terminal link browser overrides pingdotgg/t3code#10060)

Verification

• vp test run apps/desktop/src/window/DesktopWindow.test.ts apps/desktop/src/electron/ElectronMenu.test.ts: 34 passed, including guest and popup menus plus frame forwarding.
• vp lint on the four files: clean.

Native right-click in a real Electron preview was not run on this Linux host.

Implemented and verified by Grok 4.6 High in Grok Build via Orca.

[greptile-apps]

Greptile Summary

This change extends native desktop context menus to attached preview webviews and their popup windows. The exercised guest and popup flows route the menu to the correct owning window, focus the clicked contents for editing actions, forward the source frame, and retain destruction guards for image and spelling actions.

Confidence Score: 5/5

Safe to merge: no issues were identified in the changed behavior.

The focused guest and popup context-menu behavior passed after the change, including owner routing, focus handling, frame propagation, duplicate installation protection, and destruction guards.

Files Needing Attention: No files need further attention.

T-Rex Logs

What T-Rex did

• T-Rex authored and executed the context-menu-routing-validation-command.sh script to validate the context menu routing.
• Before-output results were inspected from the context-menu-routing-01.log, showing the command exited with code 1 due to a missing did-attach-webview routing in the parent.
• After-output results were inspected from the context-menu-routing-02.log, showing the command exited with code 0 with 1 passed and 25 skipped.
• A source integrity check was run using git diff --check, and it reported no issues (exit 0).

_{Ran code and verified through T-Rex}

_{Reviews (1): Last reviewed commit: "fix(desktop): enable context menus in th..." | Re-trigger Greptile}