Show a real reason for ineligible profiles, not a no-signal icon

Problem

The backend defines seven profileStatus values. The icon switch handles five, and the two it misses fall through to the default: branch, which renders a "no mobile signal" icon.

So a student who is short on CGPA, or is ineligible for the profile, is shown an icon telling them their network is down.

ModelResources.analyseProfileStatus already maps both statuses to correct English and is simply not used at these two sites.

Where

• lib/shared/ProfileStatusIcon.dart:143-144 (default: renders Icons.signal_cellular_connected_no_internet_4_bar)
• lib/views/CompanyDetailView.dart:518-519 (same)
• lib/resources/modelResources.dart:19-28 (the correct mapping, unused here)
• Backend statuses: omniport-app-placement-and-internship/constants/profile_statuses.py:4-27

Expected

candidate_ineligible and cgpa_not_eligible show a neutral info icon with the real reason.

Fix sketch

• Route the default: branch through analyseProfileStatus with an info icon.

Start in lib/shared/ProfileStatusIcon.dart:143-144 and lib/views/CompanyDetailView.dart:518-519, then read the existing mapping in lib/resources/modelResources.dart:19-28 and the backend statuses in constants/profile_statuses.py:4-27. Update the two default cases so candidate_ineligible and cgpa_not_eligible use a neutral info icon and the mapped reason. Done means both sites show the real English reason instead of the no-signal icon.