feat(web): open remote worktrees in Zed

[husseinraoouf]

Closes #7899

Problem

The generalized remote editor links from #6572 only understand VS Code's vscode-remote URL shape. Zed therefore remains local-only even though #4361 was closed, while its older dedicated implementation in #4362 predates the generalized flow. Zed Preview was not tracked.

Fix

• describe each remote-capable editor's URL shape in the shared editor registry
• build Zed's official zed://ssh/<host>/<path> hotlinks while preserving the existing host/path encoding
• include Zed in the desktop-side local editor probe
• allow only structurally valid Zed SSH hotlinks through Electron's external URL boundary
• document that stable Zed and Zed Preview share the zed:// handler, so users select Preview by registering the scheme from Preview

This follows Zed's documented remote-development URL format and its shared release-channel URL scheme. It avoids reviving the separate Zed-only IPC path from #4362.

Verification

• vp test run apps/web/src/remoteOpen.test.ts apps/desktop/src/electron/ElectronShell.test.ts � 20 tests passed
• vp run --filter @t3tools/contracts --filter @t3tools/desktop --filter @t3tools/web typecheck
• targeted vp lint for changed TypeScript files
• targeted vp fmt --check for all changed files
• git diff --check

UI changes

No layout or styling changes. Zed now appears in the existing remote Open picker when its local CLI is detected.

Implemented by Codex (gpt-5.6-sol) through the T3 Code Codex harness.

---

Note

Medium Risk
Widens Electron’s custom-scheme allowlist for openExternal, which is security-sensitive, but the new Zed paths are tightly validated (host + path, no userinfo, non-SSH routes blocked).

Overview
Lets Open on a remote worktree launch Zed via official zed://ssh/<host>/<path> hotlinks, so Zed shows up in the remote editor picker when its CLI is installed.

The editor registry now records a URL style per remote-capable editor (vscode-remote vs zed-ssh). buildRemoteOpenUrl emits the matching shape; VS Code forks are unchanged.

Electron’s external-URL allowlist is style-aware: only structurally valid Zed SSH links (host + path, no userinfo) may openExternal; zed://settings and incomplete SSH URLs stay blocked. Docs note that stable Zed and Preview share the zed:// handler.

^{Reviewed by Cursor Bugbot for commit 7d8d617. Bugbot is set up for automated code reviews on this repo. Configure here.}

Note

Add Zed as a remote-capable editor with zed://ssh/ deep links

• Introduces RemoteEditorUrlStyle union type and optional remoteUrlStyle on EditorDefinition in editor.ts, so each remote editor declares its deep-link shape
• Adds remoteScheme: 'zed' and remoteUrlStyle: 'zed-ssh' to the Zed editor entry; VS Code-family editors now explicitly declare remoteUrlStyle: 'vscode-remote'"- buildRemoteOpenUrl builds zed://ssh/<host>/<path> for Zed and continues to build <scheme>://vscode-remote/ssh-remote+<host><path> for VS Code-family; returns undefined when either scheme or style is missing
• isRemoteEditorUrl in ElectronShell.ts replaces the flat protocol allowlist with a protocol→style Map and validates URL shape per style: Zed links require host ssh plus non-empty host and path segments; VS Code links require host vscode-remote and a /ssh-remote+ prefix
• Behavioral Change: REMOTE_CAPABLE_EDITOR_IDS now requires both remoteScheme and remoteUrlStyle; editors missing either are excluded from remote-capable listings. Malformed Zed URLs (non-remote or missing path) are now rejected

^{Macroscope summarized 7d8d617.}

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[macroscopeapp]

Approvability

Verdict: Skipped

Macroscope did not run approvability analysis for this PR. Macroscope could not determine whether this PR modifies its approvability configuration, so the PR was not approved automatically. A PR that may change the rules that govern approval is never approved automatically.

[husseinraoouf]

@juliusmarminge i know you have alot on your plate, but i would appreciate if you could get this into nightly it would be a huge un-blocker for me