feat(v1): add basic backend and frontend

backend/processing/models.py

@@ -0,0 +1,53 @@
+import uuid
+
+from django.conf import settings
+from django.db import models
+from django.utils import timezone
+
+
+class ImageSession(models.Model):
+    id = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)
+    original_image = models.CharField(max_length=255)
+    processed_image = models.CharField(max_length=255, blank=True)
+    width = models.PositiveIntegerField()
+    height = models.PositiveIntegerField()
+    channels = models.PositiveSmallIntegerField()
+    color_mode = models.CharField(max_length=16)
+    original_histogram = models.JSONField(default=list)
+    processed_histogram = models.JSONField(default=list, blank=True)
+    created_at = models.DateTimeField(auto_now_add=True)
+    expires_at = models.DateTimeField()
+
+    def save(self, *args, **kwargs):
+        if not self.expires_at:
+            self.expires_at = timezone.now() + timezone.timedelta(hours=settings.IMAGE_SESSION_TTL_HOURS)
+        super().save(*args, **kwargs)
+
+    @property
+    def expired(self):
+        return timezone.now() >= self.expires_at
+
+
+class ProcessingJob(models.Model):
+    STATUS_PENDING = "pending"
+    STATUS_RUNNING = "running"
+    STATUS_COMPLETE = "complete"
+    STATUS_FAILED = "failed"
+
+    STATUS_CHOICES = [
+        (STATUS_PENDING, "Pending"),
+        (STATUS_RUNNING, "Running"),
+        (STATUS_COMPLETE, "Complete"),
+        (STATUS_FAILED, "Failed"),
+    ]
+
+    id = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)
+    operation = models.CharField(max_length=64)
+    params = models.JSONField(default=dict, blank=True)
+    status = models.CharField(max_length=16, choices=STATUS_CHOICES, default=STATUS_PENDING)
+    progress = models.PositiveSmallIntegerField(default=0)
+    result_image = models.CharField(max_length=255, blank=True)
+    result_histogram = models.JSONField(default=list, blank=True)
+    error = models.TextField(blank=True)
+    created_at = models.DateTimeField(auto_now_add=True)
+    updated_at = models.DateTimeField(auto_now=True)