me-web? 0.4: no network failure takes the app down; mobile data read right; the route on the path

- Every network call returns a result whatever fails, not only the exceptions .NET
  usually throws: on Android the HTTPS client is the platform's own stack, and a network
  switch mid-request throws others. The outside test as a whole cannot throw; sharing the
  link falls back to copying it. A last guard (the UI thread, unobserved tasks, Android's
  raiser) writes errors.log in the app folder and keeps the app running; nothing is sent.
- On mobile data the app no longer probes the operator's gateway as if it were a home
  router: the router card says there is none, a private address on the phone with another
  public one is the operator's address sharing (CGNAT) and is drawn as its shared exit, the
  public IPv4 is held by that exit, and the provider's notes are labelled as being about its
  home lines. These were "router not answering" and "can't tell" on an Iliad phone.
- The route's routers appear as stops on the path's wires: the operator's internal ones
  before its exit, the public ones with their network number towards the internet.
- The download speed is timed after the first quarter of the sample, once the connection
  has ramped up; the path no longer shows the address block's registry country.
- Two new strings, drafted in every language.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_012CzABvBkbcFqoHdmi8b9WB

src/MeWeb.App/Strings/fj.json

@@ -198,6 +198,7 @@
   "ProviderIpv6None": "sega ni vakarautaki",
   "ProviderIpv6Tunnel": "ena dua na tunnel (6rd)",
   "ProviderListed": "Na nomu kabani ni internet o {0}.",
+  "ProviderListedMobile": "Na nomu kabani ni internet o {0}. Na ivakamacala e ra e baleta na nona laini ni vale; na iyaya oqo e tiko ena nona network ni mobile.",
   "ProviderNoAddress": "Ke sega na itikotiko raraba, e sega ni kunei rawa na kabani.",
   "ProviderNoMap": "Na kopi oqo ni me-web? e sega ni tiko kina na mape ni kabani.",
   "ProviderNotFound": "E sega ni kila na mape ni kabani na itikotiko oqo.",
@@ -338,6 +339,7 @@
   "ValueRefused": "cakitaka (kodi {0})",
   "ValueSample": "{0} MB vakasobu, {1} MB vakacabe",
   "ValueSharedAtHome": "nomu router, wasei vei ira kece na iyaya mai vale",
+  "ValueSharedProvider": "sala i tuba veiwaseni ni nomu kabani, era dau vakayagataka talega na so tale na kasitama",
   "ValueSilent": "sega ni sauma",
   "ValueYes": "io",
   "VerdictCannotTell": "Sega ni kilai",