chore: stage all in-progress work before repo split

Web app: new entities (Image, RenderedAsset, SharedImage, Token,
DeviceImageHistory), enums, repositories, controllers, message handlers,
migrations, tests, frontend upload/library/sticker UI, Vue components.

Firmware: EPD background screen binaries + gen scripts, setup_bg header.

Infra: ddev config, test bundle, gitignore coverage dir.

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

migrations/Version20260507100000.php

@@ -0,0 +1,42 @@
+<?php
+
+declare(strict_types=1);
+
+namespace DoctrineMigrations;
+
+use Doctrine\DBAL\Schema\Schema;
+use Doctrine\Migrations\AbstractMigration;
+
+final class Version20260507100000 extends AbstractMigration
+{
+    public function getDescription(): string
+    {
+        return 'Add token table for share and hard-delete flows';
+    }
+
+    public function up(Schema $schema): void
+    {
+        $this->addSql("CREATE TABLE token (
+            uuid VARCHAR(36) NOT NULL,
+            type VARCHAR(30) NOT NULL,
+            image_id INT NOT NULL,
+            recipient_user_id INT DEFAULT NULL,
+            recipient_email VARCHAR(180) DEFAULT NULL,
+            expires_at TIMESTAMP(0) WITHOUT TIME ZONE NOT NULL,
+            used_at TIMESTAMP(0) WITHOUT TIME ZONE DEFAULT NULL,
+            PRIMARY KEY(uuid)
+        )");
+        $this->addSql("COMMENT ON COLUMN token.expires_at IS '(DC2Type:datetime_immutable)'");
+        $this->addSql("COMMENT ON COLUMN token.used_at IS '(DC2Type:datetime_immutable)'");
+        $this->addSql('ALTER TABLE token ADD CONSTRAINT fk_token_image FOREIGN KEY (image_id) REFERENCES image (id) ON DELETE CASCADE NOT DEFERRABLE INITIALLY IMMEDIATE');
+        $this->addSql('ALTER TABLE token ADD CONSTRAINT fk_token_recipient FOREIGN KEY (recipient_user_id) REFERENCES "user" (id) ON DELETE SET NULL NOT DEFERRABLE INITIALLY IMMEDIATE');
+        $this->addSql('CREATE INDEX idx_token_recipient ON token (recipient_user_id)');
+    }
+
+    public function down(Schema $schema): void
+    {
+        $this->addSql('ALTER TABLE token DROP CONSTRAINT fk_token_image');
+        $this->addSql('ALTER TABLE token DROP CONSTRAINT fk_token_recipient');
+        $this->addSql('DROP TABLE token');
+    }
+}