feat(t3code-bin): add T3 Code desktop from the AUR

T3 Code is an open-source control plane for coding agents — Claude Code, Codex, OpenCode, Cursor and Grok driven from one desktop app, on the user's own subscriptions. Upstream ships a Linux x86_64 AppImage only, and the AUR's t3code-bin already tracks it, so this syncs from there in the fast ring.

One Omarchy patch: the AUR launcher runs Electron with --no-sandbox. Chromium falls back to a user-namespace sandbox when it finds no setuid helper, which is what happens on Arch, so the flag only turns the sandbox off. Verified both ways against the built package — sandboxed it reaches display setup, and only with namespaces restricted does it abort on the setuid helper.

🤖 Generated by Opus 5 in Claude Code.

pkgbuilds/t3code-bin/LICENSE

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+MIT License
+
+Copyright (c) 2026 T3 Tools Inc.
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.