[client] Apply routes right away instead of on peer connection

[lixmal]

Describe your changes

• Moves the apply routes logic from the route client watcher to the network map update
• Moves routes client and server to own packages
• Applies DNS settings before routes to satisfy DNS route dependencies

Issue ticket number and link

Stack

• [client] Apply routes right away instead of on peer connection #3907 👈
  • [client] Add lazy connections to routed networks #3908

Checklist

• Is it a bug fix
• Is a typo/documentation fix
• Is a feature enhancement
• It is a refactor
• Created tests that fail without the change (if possible)
• Extended the README / documentation, if necessary

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[Copilot]

Pull Request Overview

This PR refactors routing logic by immediately applying routes instead of waiting on peer connection, while also renaming and reorganizing several internal types and functions for consistency. Key changes include:

• Updating dialog button labels in the UI for route-related error dialogs.
• Refactoring the server router and client watcher components with renamed types and methods.
• Adjusting DNS configuration updates and streamlining route updates in the engine.

Reviewed Changes

Copilot reviewed 8 out of 8 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
client/ui/debug.go	Updated dialog button labels from “Cancel” to “cancel”.
client/internal/routemanager/static/route.go	Switched to inline error checking and added explicit return statements.
client/internal/routemanager/server/server.go	Renamed internal router type from serverRouter to Router and updated method names.
client/internal/routemanager/manager.go	Refactored client network watcher integration with new activeRoutes and update flow.
client/internal/routemanager/client/client.go	Renamed and refactored client network (Watcher) functions and update handling.
client/internal/engine.go	Moved and streamlined DNS server update logic.
client/internal/dns/server.go	Modified debug logging to show extra domain keys using maps.Keys.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
6 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud