feat: ticket views, statuses, participants, merge; mobile layout fixes (#5)

- New migrations: ticket views, statuses, participants, merge support
- New models: TicketView, TicketStatus, TicketParticipant
- New seeder: EmailTemplatesSeeder
- Console commands for ticketing
- Mobile: sidebar min-w-0/overflow-hidden, tab nav overflow-x-auto

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

database/migrations/2026_04_14_000001_make_priorities_global.php

@@ -0,0 +1,52 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\DB;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    public function up(): void
+    {
+        // Deduplicate before removing group_id:
+        // If the same priority name exists multiple times (once per group), keep the first
+        // and delete duplicates, then reassign any tickets that referenced the deleted ones.
+        $names = DB::table('ticketing_priority_levels')
+            ->select('name')
+            ->groupBy('name')
+            ->havingRaw('COUNT(*) > 1')
+            ->pluck('name');
+
+        foreach ($names as $name) {
+            $rows = DB::table('ticketing_priority_levels')
+                ->where('name', $name)
+                ->orderBy('id')
+                ->get();
+
+            $keepId = $rows->first()->id;
+
+            foreach ($rows->skip(1) as $row) {
+                // Reassign tickets pointing at the duplicate
+                DB::table('tickets')
+                    ->where('priority_id', $row->id)
+                    ->update(['priority_id' => $keepId]);
+
+                DB::table('ticketing_priority_levels')->where('id', $row->id)->delete();
+            }
+        }
+
+        Schema::table('ticketing_priority_levels', function (Blueprint $table) {
+            // Drop the foreign key and column
+            $table->dropForeign(['group_id']);
+            $table->dropColumn('group_id');
+        });
+    }
+
+    public function down(): void
+    {
+        Schema::table('ticketing_priority_levels', function (Blueprint $table) {
+            $table->foreignId('group_id')->nullable()->constrained('ticketing_groups')->nullOnDelete();
+        });
+    }
+};

database/migrations/2026_04_14_000002_create_ticket_views_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
+{
+    public function up(): void
+    {
+        Schema::create('ticket_views', function (Blueprint $table) {
+            $table->id();
+            $table->foreignId('ticket_id')->constrained('tickets')->cascadeOnDelete();
+            $table->unsignedBigInteger('user_id');
+            $table->timestamp('viewed_at');
+            $table->index(['ticket_id', 'user_id']);
+            $table->index('viewed_at');
+        });
+    }
+
+    public function down(): void
+    {
+        Schema::dropIfExists('ticket_views');
+    }
+};

database/migrations/2026_04_17_000001_add_participants_and_merge_to_tickets.php

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+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\DB;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    public function up(): void
+    {
+        // 1. Create ticket_participants table
+        Schema::create('ticket_participants', function (Blueprint $table) {
+            $table->id();
+            $table->foreignId('ticket_id')->constrained()->cascadeOnDelete();
+            $table->unsignedBigInteger('user_id');
+            $table->unsignedBigInteger('added_by')->nullable();
+            $table->timestamp('created_at')->useCurrent();
+
+            $table->unique(['ticket_id', 'user_id']);
+        });
+
+        // 2. Add merged_into_id to tickets
+        Schema::table('tickets', function (Blueprint $table) {
+            $table->unsignedBigInteger('merged_into_id')->nullable()->after('due_date');
+            $table->foreign('merged_into_id')->references('id')->on('tickets')->nullOnDelete();
+        });
+
+        // 3. Expand status ENUM to include 'merged'
+        DB::statement("ALTER TABLE tickets MODIFY COLUMN status ENUM('open','in_progress','pending','resolved','closed','merged') DEFAULT 'open'");
+    }
+
+    public function down(): void
+    {
+        // Reverse ENUM change (remove merged)
+        DB::statement("UPDATE tickets SET status = 'closed' WHERE status = 'merged'");
+        DB::statement("ALTER TABLE tickets MODIFY COLUMN status ENUM('open','in_progress','pending','resolved','closed') DEFAULT 'open'");
+
+        Schema::table('tickets', function (Blueprint $table) {
+            $table->dropForeign(['merged_into_id']);
+            $table->dropColumn('merged_into_id');
+        });
+
+        Schema::dropIfExists('ticket_participants');
+    }
+};

database/migrations/2026_04_17_000002_create_ticketing_statuses_table.php

@@ -0,0 +1,46 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\DB;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    public function up(): void
+    {
+        // 1. Create ticketing_statuses table
+        Schema::create('ticketing_statuses', function (Blueprint $table) {
+            $table->id();
+            $table->string('slug', 50)->unique();   // machine key — immutable after creation
+            $table->string('name', 100);             // user-facing display name
+            $table->string('color', 7)->default('#6b7280'); // hex color
+            $table->unsignedSmallInteger('sort_order')->default(0);
+            $table->boolean('is_closed')->default(false);  // counts as "resolved/closed" in filters
+            $table->boolean('is_system')->default(false);  // cannot be deleted
+            $table->timestamps();
+        });
+
+        // 2. Seed default statuses
+        $now = now();
+        DB::table('ticketing_statuses')->insert([
+            ['slug' => 'open',        'name' => 'Open',        'color' => '#3b82f6', 'sort_order' => 1,  'is_closed' => false, 'is_system' => true,  'created_at' => $now, 'updated_at' => $now],
+            ['slug' => 'in_progress', 'name' => 'In Progress', 'color' => '#7c3aed', 'sort_order' => 2,  'is_closed' => false, 'is_system' => true,  'created_at' => $now, 'updated_at' => $now],
+            ['slug' => 'pending',     'name' => 'Pending',     'color' => '#d97706', 'sort_order' => 3,  'is_closed' => false, 'is_system' => true,  'created_at' => $now, 'updated_at' => $now],
+            ['slug' => 'resolved',    'name' => 'Resolved',    'color' => '#16a34a', 'sort_order' => 4,  'is_closed' => true,  'is_system' => true,  'created_at' => $now, 'updated_at' => $now],
+            ['slug' => 'closed',      'name' => 'Closed',      'color' => '#6b7280', 'sort_order' => 5,  'is_closed' => true,  'is_system' => true,  'created_at' => $now, 'updated_at' => $now],
+            ['slug' => 'merged',      'name' => 'Merged',      'color' => '#9ca3af', 'sort_order' => 99, 'is_closed' => true,  'is_system' => true,  'created_at' => $now, 'updated_at' => $now],
+        ]);
+
+        // 3. Change tickets.status from ENUM to VARCHAR(50) — existing slug values are kept as-is
+        DB::statement("ALTER TABLE tickets MODIFY COLUMN status VARCHAR(50) NOT NULL DEFAULT 'open'");
+    }
+
+    public function down(): void
+    {
+        // Restore ENUM (data already uses these slugs so no data loss)
+        DB::statement("ALTER TABLE tickets MODIFY COLUMN status ENUM('open','in_progress','pending','resolved','closed','merged') DEFAULT 'open'");
+
+        Schema::dropIfExists('ticketing_statuses');
+    }
+};