fix: remove invalid 'network-extension' from UIBackgroundModes

[torlando-tech]

Summary

App Store Connect rejected build 0.0.2 (10) with:

ITMS-90112: Invalid Info.plist value. The Info.plist key UIBackgroundModes contains an invalid value: 'network-extension'.

network-extension isn't in Apple's allowed UIBackgroundModes list (audio, bluetooth-central, bluetooth-peripheral, external-accessory, fetch, location, network-authentication, processing, push, remote-notification, voip). Network Extensions declare themselves via NSExtension / NSExtensionPointIdentifier in the extension target's own Info.plist (which we already do correctly in Sources/ColumbaNetworkExtension/Info.plist).

The host app doesn't need any background mode for the packet tunnel — the system keeps the extension running on its own once NEPacketTunnelProvider is started.

Test plan

• Diff is one line removed from Info.plist
• Xcode Cloud Build Route to RNode wizard after onboarding when user opted in #11 archive uploads successfully (no ITMS-90112)
• Build appears in TestFlight as 0.0.2 (N)

🤖 Generated with Claude Code

[greptile-apps]

Greptile Summary

Removes the invalid network-extension string from UIBackgroundModes in Sources/ColumbaApp/Resources/Info.plist, fixing the App Store Connect rejection (ITMS-90112). The remaining four background modes (bluetooth-central, bluetooth-peripheral, location, voip) are all valid Apple-defined values.

Confidence Score: 5/5

Safe to merge — single-line removal of a value that Apple explicitly rejects; no functional code changes.

The change is minimal, well-motivated by the App Store Connect error, and the resulting UIBackgroundModes array contains only documented, valid Apple values. No logic, runtime behaviour, or entitlements are affected.

No files require special attention.

Important Files Changed

Filename	Overview
Sources/ColumbaApp/Resources/Info.plist	Removes invalid network-extension from UIBackgroundModes; remaining modes are all valid Apple values.

Flowchart

%%{init: {'theme': 'neutral'}}%%
flowchart TD
    A[App Store Connect submission] -->|ITMS-90112 rejection| B{UIBackgroundModes contains 'network-extension'?}
    B -->|Yes – before this PR| C[Rejected: invalid value]
    B -->|No – after this PR| D[Accepted: only valid modes remain]
    D --> E[bluetooth-central]
    D --> F[bluetooth-peripheral]
    D --> G[location]
    D --> H[voip]
    I[NEPacketTunnelProvider] -->|runs in its own extension process| J[ColumbaNetworkExtension Info.plist NSExtensionPointIdentifier]
    J -.->|host app needs no background mode for the tunnel| D

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