fix(RelayBarGlass): usage never loads — start polling from AppModel.init

[devin-ai-integration]

Summary

RelayBar (Glass) made zero network requests for its entire lifetime, so every tool tab was stuck on hardcoded seed values and fell into the "Not routed through Relay" state regardless of gateway/key/config (issue #32).

Root cause: AppModel.start() — which creates the 5s poll timer and triggers the first fetch — was invoked from .onAppear on the MenuBarExtra label. Under .menuBarExtraStyle(.window) that label's .onAppear never fires, so start() was never called → no timer → refresh()/refreshSpend()/computeSpend() never ran → no HTTP request ever made. The failure was silent because lastError is only set on a fetch path that never executed.

Fix: drive polling from the model instead of a view modifier.

// AppModel.init()
self.agents = AppModel.seedAgents()
start()                       // added

// RelayBarApp.swift
} label: {
    Text("✨🚅")               // .onAppear { model.start() } removed
}

AppModel is @MainActor and the @StateObject is created on the main actor, so start() (which schedules the Timer on RunLoop.main and kicks off detached fetch tasks) runs safely from init.

Scope / not included

This fixes the confirmed root cause (no polling → no data). The reporter's separate "still open" note about an empty Claude Code tab after polling works is not addressed here — it was never reproduced from code (network, JSON decode, SwiftUI observation, and tool attribution were all ruled out) and needs live macOS observation to diagnose.

Validation

This is a macOS-only SwiftUI/AppKit menu bar app (MenuBarExtra, .menuBarExtraStyle(.window)); it cannot be built or run on the Linux CI/dev box (no Swift/Xcode toolchain). The change matches the diagnosis and fix in issue #32, whose author verified on macOS: before fix 0 network requests from the process; after fix 12 successful HTTP 200 gateway responses in 30s.

Link to Devin session: https://app.devin.ai/sessions/77a9c75c205e4dbba85ee512c814bbe4
Requested by: @ishaan-berri

[devin-ai-integration]

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