feat: add environment variable autocomplete component

Adds a new EnvVarInput component that provides autocomplete suggestions for shared environment variables from team, project, and environment scopes. Users can reference variables using {{ syntax.

🤖 Generated with Claude Code

Co-Authored-By: Claude <noreply@anthropic.com>

tests/Unit/EnvVarInputComponentTest.php

@@ -0,0 +1,67 @@
+<?php
+
+use App\View\Components\Forms\EnvVarInput;
+
+it('renders with default properties', function () {
+    $component = new EnvVarInput;
+
+    expect($component->required)->toBeFalse()
+        ->and($component->disabled)->toBeFalse()
+        ->and($component->readonly)->toBeFalse()
+        ->and($component->defaultClass)->toBe('input')
+        ->and($component->availableVars)->toBe([]);
+});
+
+it('uses provided id', function () {
+    $component = new EnvVarInput(id: 'env-key');
+
+    expect($component->id)->toBe('env-key');
+});
+
+it('accepts available vars', function () {
+    $vars = [
+        'team' => ['DATABASE_URL', 'API_KEY'],
+        'project' => ['STRIPE_KEY'],
+        'environment' => ['DEBUG'],
+    ];
+
+    $component = new EnvVarInput(availableVars: $vars);
+
+    expect($component->availableVars)->toBe($vars);
+});
+
+it('accepts required parameter', function () {
+    $component = new EnvVarInput(required: true);
+
+    expect($component->required)->toBeTrue();
+});
+
+it('accepts disabled state', function () {
+    $component = new EnvVarInput(disabled: true);
+
+    expect($component->disabled)->toBeTrue();
+});
+
+it('accepts readonly state', function () {
+    $component = new EnvVarInput(readonly: true);
+
+    expect($component->readonly)->toBeTrue();
+});
+
+it('accepts autofocus parameter', function () {
+    $component = new EnvVarInput(autofocus: true);
+
+    expect($component->autofocus)->toBeTrue();
+});
+
+it('accepts authorization properties', function () {
+    $component = new EnvVarInput(
+        canGate: 'update',
+        canResource: 'resource',
+        autoDisable: false
+    );
+
+    expect($component->canGate)->toBe('update')
+        ->and($component->canResource)->toBe('resource')
+        ->and($component->autoDisable)->toBeFalse();
+});