perf(desktop): create windows before the background service connects - #49763

…nomalyco#49763)

Create the main windows before waiting on the sidecar health check; the
renderer already awaits the sidecar credentials over IPC, so it can paint
while the server boots. Also run the login-shell environment probe
asynchronously so it overlaps Electron startup and window creation instead
of blocking the main process.

On a dev build the renderer now reaches the server request at ~0.8s
instead of ~5.2-6.2s after launch.

Window ordering adapted from upstream 5b565e8 (anomalyco#49763) and
e1e2efe (anomalyco#49869); the async shell probe is Forge's own.

Create the main windows before waiting on the sidecar health check; the
renderer already awaits the sidecar credentials over IPC, so it can paint
while the server boots. Also run the login-shell environment probe
asynchronously so it overlaps Electron startup and window creation instead
of blocking the main process.

On a dev build the renderer now reaches the server request at ~0.8s
instead of ~5.2-6.2s after launch.

Window ordering adapted from upstream 5b565e8 (anomalyco#49763) and
e1e2efe (anomalyco#49869); the async shell probe is Forge's own.

Upstream: anomalyco/opencode@5b565e8923 (anomalyco#49763)
Upstream: anomalyco/opencode@e1e2efe8ec (anomalyco#49869)

Create the main windows before waiting on the sidecar health check; the
renderer already awaits the sidecar credentials over IPC, so it can paint
while the server boots. Also run the login-shell environment probe
asynchronously so it overlaps Electron startup and window creation instead
of blocking the main process.

On a dev build the renderer now reaches the server request at ~0.8s
instead of ~5.2-6.2s after launch.

Window ordering adapted from upstream 5b565e8 (anomalyco#49763) and
e1e2efe (anomalyco#49869); the async shell probe is Forge's own.

Upstream: anomalyco/opencode@5b565e8923 (anomalyco#49763)
Upstream: anomalyco/opencode@e1e2efe8ec (anomalyco#49869)

Create the main windows before waiting on the sidecar health check; the
renderer already awaits the sidecar credentials over IPC, so it can paint
while the server boots. Also run the login-shell environment probe
asynchronously so it overlaps Electron startup and window creation instead
of blocking the main process.

On a dev build the renderer now reaches the server request at ~0.8s
instead of ~5.2-6.2s after launch.

Window ordering adapted from upstream 5b565e8 (anomalyco#49763) and
e1e2efe (anomalyco#49869); the async shell probe is Forge's own.

Upstream: anomalyco/opencode@5b565e8923 (anomalyco#49763)
Upstream: anomalyco/opencode@e1e2efe8ec (anomalyco#49869)

Create the main windows before waiting on the sidecar health check; the
renderer already awaits the sidecar credentials over IPC, so it can paint
while the server boots. Also run the login-shell environment probe
asynchronously so it overlaps Electron startup and window creation instead
of blocking the main process.

On a dev build the renderer now reaches the server request at ~0.8s
instead of ~5.2-6.2s after launch.

Window ordering adapted from upstream 5b565e8 (anomalyco#49763) and
e1e2efe (anomalyco#49869); the async shell probe is Forge's own.

Upstream: anomalyco/opencode@5b565e8923 (anomalyco#49763)
Upstream: anomalyco/opencode@e1e2efe8ec (anomalyco#49869)
Co-authored-by: Luke Parker <[email protected]>