Implement ticket links and blocker state

database/migrations/2026_03_25_073715_add_blocking_fields_to_tickets_table.php

@@ -0,0 +1,33 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    /**
+     * Run the migrations.
+     */
+    public function up(): void
+    {
+        Schema::table('tickets', function (Blueprint $table) {
+            $table->boolean('is_blocked')
+                ->default(false)
+                ->after('parent_ticket_id');
+            $table->text('blocked_comment')
+                ->nullable()
+                ->after('is_blocked');
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::table('tickets', function (Blueprint $table) {
+            $table->dropColumn(['blocked_comment', 'is_blocked']);
+        });
+    }
+};

database/migrations/2026_03_25_073715_create_ticket_link_types_table.php

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+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    /**
+     * Run the migrations.
+     */
+    public function up(): void
+    {
+        Schema::create('ticket_link_types', function (Blueprint $table) {
+            $table->id();
+            $table->foreignId('project_id')->constrained()->cascadeOnDelete();
+            $table->string('label');
+            $table->unsignedInteger('position');
+            $table->timestamps();
+
+            $table->unique(['project_id', 'label']);
+            $table->unique(['project_id', 'position']);
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::dropIfExists('ticket_link_types');
+    }
+};

database/migrations/2026_03_25_073715_create_ticket_links_table.php

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+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    /**
+     * Run the migrations.
+     */
+    public function up(): void
+    {
+        Schema::create('ticket_links', function (Blueprint $table) {
+            $table->id();
+            $table->foreignId('ticket_link_type_id')->constrained()->cascadeOnDelete();
+            $table->foreignId('source_ticket_id')->constrained('tickets')->cascadeOnDelete();
+            $table->foreignId('target_ticket_id')->constrained('tickets')->cascadeOnDelete();
+            $table->timestamps();
+
+            $table->unique(['source_ticket_id', 'target_ticket_id']);
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::dropIfExists('ticket_links');
+    }
+};