feat: rebuild site content management

Replace legacy FAQ, downloads, and release flows with project and blog publishing. Add configurable branding and theme fields plus clean-start Compose seeding support.

apps/core/models.py

@@ -1,8 +1,12 @@
-from django.core.validators import FileExtensionValidator
+from django.core.validators import FileExtensionValidator, RegexValidator
 from django.db import models
 
 
 class SiteBranding(models.Model):
+    hex_color_validator = RegexValidator(
+        regex=r"^#[0-9A-Fa-f]{6}$",
+        message="Enter a six-digit hex colour such as #4f8ef7.",
+    )
     OBJECT_FIT_COVER = "cover"
     OBJECT_FIT_CONTAIN = "contain"
     OBJECT_FIT_CHOICES = [
@@ -10,6 +14,23 @@ class SiteBranding(models.Model):
         (OBJECT_FIT_CONTAIN, "Contain (fit inside square)"),
     ]
 
+    site_name = models.CharField(max_length=120, default="Communication to Care")
+    short_name = models.CharField(
+        max_length=60,
+        default="com2care",
+        help_text="Compact name used in the navigation bar.",
+    )
+    tagline = models.CharField(
+        max_length=300,
+        default="Turning complex medical-imaging evidence into clearer, reproducible research conversations.",
+        blank=True,
+    )
+    meta_description = models.CharField(
+        max_length=300,
+        default="Communication to Care — Advanced Medical Imaging and Radiomics Solutions",
+        blank=True,
+    )
+
     icon = models.ImageField(
         upload_to="branding/",
         blank=True,
@@ -77,13 +98,34 @@ class SiteBranding(models.Model):
         choices=OBJECT_FIT_CHOICES,
         default=OBJECT_FIT_COVER,
     )
+    background_color = models.CharField(
+        max_length=7, default="#070713", validators=[hex_color_validator]
+    )
+    surface_color = models.CharField(
+        max_length=7, default="#10102a", validators=[hex_color_validator]
+    )
+    primary_color = models.CharField(
+        max_length=7, default="#4f8ef7", validators=[hex_color_validator]
+    )
+    secondary_color = models.CharField(
+        max_length=7, default="#a78bfa", validators=[hex_color_validator]
+    )
+    accent_color = models.CharField(
+        max_length=7, default="#22d3ee", validators=[hex_color_validator]
+    )
+    text_color = models.CharField(
+        max_length=7, default="#eef2ff", validators=[hex_color_validator]
+    )
+    muted_text_color = models.CharField(
+        max_length=7, default="#a6abc2", validators=[hex_color_validator]
+    )
 
     class Meta:
         verbose_name = "Site Branding"
         verbose_name_plural = "Site Branding"
 
     def __str__(self):
-        return "Site Branding"
+        return self.site_name
 
     @classmethod
     def load(cls):
@@ -108,6 +150,26 @@ class SiteBranding(models.Model):
     def footer_icon_style(self):
         return self.icon_style(self.footer_icon_size)
 
+    @property
+    def theme_style(self):
+        return ";".join(
+            (
+                f"--bg-primary:{self.background_color}",
+                f"--bg-secondary:{self.background_color}",
+                f"--bg-surface:{self.surface_color}",
+                f"--accent-blue:{self.primary_color}",
+                f"--accent-blue-light:{self.primary_color}",
+                f"--accent-purple:{self.secondary_color}",
+                f"--accent-cyan:{self.accent_color}",
+                f"--text-primary:{self.text_color}",
+                f"--text-secondary:{self.muted_text_color}",
+                f"--text-muted:{self.muted_text_color}",
+                f"--text-link:{self.primary_color}",
+                f"--gradient-brand:linear-gradient(135deg,{self.primary_color} 0%,{self.secondary_color} 100%)",
+                f"--gradient-text:linear-gradient(135deg,{self.primary_color} 0%,{self.secondary_color} 50%,{self.accent_color} 100%)",
+            )
+        )
+
 
 class SiteContact(models.Model):
     support_email = models.EmailField(