fix(mobile): don't mark Android VPN/Tailscale as offline when connected

[Wraient]

What Changed

Stop treating Android expo-network isInternetReachable: false as offline when the interface is still connected.

• In apps/mobile/src/connection/platform.ts, prefer isConnected for online/offline
• Do not treat isInternetReachable === false as offline when the interface is connected

Why

On Android, isInternetReachable often stays false on Tailscale/VPN even when the active network works. Expo documents that this flag requires validated internet capability and, for VPN, non-zero downstream bandwidth.

That made the mobile connection supervisor report offline after a successful HTTP pair, so it never requested a websocket ticket or opened /ws. Server-side this showed as paired mobile sessions with last connected: never.

Checklist

• This PR is small and focused
• I explained what changed and why
• I included before/after screenshots for any UI changes
• I included a video for animation/interaction changes (N/A)

Validation

• Built and installed an Android preview APK with this change; paired over Tailscale and confirmed the environment connects online (WebSocket live, no longer stuck offline after pairing)

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Note

Low Risk
Single-condition change in mobile network status mapping; may report online in edge cases where there is no real internet, but restores correct behavior for VPN/Tailscale.

Overview
Fixes mobile connectivity on Android VPN/Tailscale by changing how networkStatus in platform.ts maps expo-network state into the shared Connectivity layer.

Previously, isInternetReachable === false forced "offline" even when isConnected was true. On Android that flag is often wrong on VPN/Tailscale, so the connection supervisor stayed offline after pairing and never opened the WebSocket.

Now only isConnected === false yields offline; a connected interface with an unreliable isInternetReachable can report "online" or "unknown" instead.

^{Reviewed by Cursor Bugbot for commit bd40ea0. Bugbot is set up for automated code reviews on this repo. Configure here.}

Note

Fix Android VPN/Tailscale connections being marked as offline in mobile app

The networkStatus function in platform.ts previously returned "offline" when isInternetReachable was false, which incorrectly flagged VPN and Tailscale connections on Android as offline. The fix narrows the offline condition to only check state.isConnected === false, so a connected device with an unresolvable isInternetReachable returns "online" or "unknown" instead.

^{Macroscope summarized bd40ea0.}

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[macroscopeapp]

Approvability

Verdict: Approved

Small, straightforward bug fix that relaxes overly aggressive offline detection logic on Android VPN/Tailscale. Single-line change with clear intent and limited scope.

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