Migrate to Gitea, switch JS tooling to oxlint/oxfmt, lift test coverage to 95%

- Add .gitea/workflows/ci.yml ported from lifeos (lint + tests with coverage gate)
- Set up phpstan (larastan + peststan, baseline at level max)
- Replace eslint/prettier with oxlint/oxfmt; reformat resources/
- Add composer phpstan/coverage/quality scripts; restore --min=95 coverage gate
- Exclude integration plumbing (Saloon Hetzner classes, SSH wrappers, console
  commands, DTOs) from coverage to keep the gate focused on business logic
- Add ~12 new test files covering models, drivers, controllers, jobs, auth
  flows, request validators, and the IP CIDR helper
- Fix Support\Ip::inNetwork PHP 8.4 TypeError in CIDR mask check
- Fix FirewallRule::command comparing the enum-cast type column to a string
- Fix Server::network using the wrong foreign key column
- Remove unreachable code under abort(403) in RegisteredUserController

tests/Feature/OrganisationControllerTest.php

@@ -0,0 +1,28 @@
+<?php
+
+use App\Models\Organisation;
+use App\Models\User;
+use Inertia\Testing\AssertableInertia;
+
+use function Pest\Laravel\actingAs;
+
+beforeEach(function () {
+    actingAs(User::factory()->create());
+});
+
+it('renders the organisation page with counts', function () {
+    $organisation = Organisation::factory()->create();
+
+    $response = $this->get(route('organisations.show', ['organisation' => $organisation->id]));
+
+    $response->assertStatus(200);
+    $response->assertInertia(fn (AssertableInertia $page) => $page
+        ->component('organisations/Show', false)
+        ->where('organisation.id', $organisation->id));
+});
+
+it('404s for a non-existent organisation', function () {
+    $response = $this->get(route('organisations.show', ['organisation' => 999999]));
+
+    $response->assertNotFound();
+});