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>

app/Livewire/Project/Shared/EnvironmentVariable/Add.php

@@ -2,8 +2,11 @@
 
 namespace App\Livewire\Project\Shared\EnvironmentVariable;
 
+use App\Models\Environment;
+use App\Models\Project;
 use App\Traits\EnvironmentVariableAnalyzer;
 use Illuminate\Foundation\Auth\Access\AuthorizesRequests;
+use Livewire\Attributes\Computed;
 use Livewire\Component;
 
 class Add extends Component
@@ -56,6 +59,72 @@ class Add extends Component
         $this->problematicVariables = self::getProblematicVariablesForFrontend();
     }
 
+    #[Computed]
+    public function availableSharedVariables(): array
+    {
+        $team = currentTeam();
+        $result = [
+            'team' => [],
+            'project' => [],
+            'environment' => [],
+        ];
+
+        // Early return if no team
+        if (! $team) {
+            return $result;
+        }
+
+        // Check if user can view team variables
+        try {
+            $this->authorize('view', $team);
+            $result['team'] = $team->environment_variables()
+                ->pluck('key')
+                ->toArray();
+        } catch (\Illuminate\Auth\Access\AuthorizationException $e) {
+            // User not authorized to view team variables
+        }
+
+        // Get project variables if we have a project_uuid in route
+        $projectUuid = data_get($this->parameters, 'project_uuid');
+        if ($projectUuid) {
+            $project = Project::where('team_id', $team->id)
+                ->where('uuid', $projectUuid)
+                ->first();
+
+            if ($project) {
+                try {
+                    $this->authorize('view', $project);
+                    $result['project'] = $project->environment_variables()
+                        ->pluck('key')
+                        ->toArray();
+
+                    // Get environment variables if we have an environment_uuid in route
+                    $environmentUuid = data_get($this->parameters, 'environment_uuid');
+                    if ($environmentUuid) {
+                        $environment = $project->environments()
+                            ->where('uuid', $environmentUuid)
+                            ->first();
+
+                        if ($environment) {
+                            try {
+                                $this->authorize('view', $environment);
+                                $result['environment'] = $environment->environment_variables()
+                                    ->pluck('key')
+                                    ->toArray();
+                            } catch (\Illuminate\Auth\Access\AuthorizationException $e) {
+                                // User not authorized to view environment variables
+                            }
+                        }
+                    }
+                } catch (\Illuminate\Auth\Access\AuthorizationException $e) {
+                    // User not authorized to view project variables
+                }
+            }
+        }
+
+        return $result;
+    }
+
     public function submit()
     {
         $this->validate();