feat(v3): restructure project + add complete frontend

- Restructure: move backend from new_project/ to backend/
- Add full React/TypeScript frontend (37 pages, 17 services, 16 type defs, 11 query hooks)
- Add docs/ with SRS specs, user stories, and workflow documentation
- Update .gitignore for new directory layout

Workflows implemented:
  WF1 User Signup, WF2 Placement Test, WF3 Exam Configuration,
  WF4 General English Exam, WF5 Course Generation,
  WF6 Entity Student Onboarding, AI Course Generation,
  Adaptive Learning Engine UI, White-Label Branding, Score Release

Made-with: Cursor

custom_addons/encoach_branding/models/__init__.py

@@ -0,0 +1 @@
+from . import branding

custom_addons/encoach_branding/models/branding.py

@@ -0,0 +1,40 @@
+from odoo import models, fields
+
+
+class EncoachBranding(models.Model):
+    _name = 'encoach.branding'
+    _description = 'Entity Branding'
+
+    entity_id = fields.Many2one('encoach.entity', required=True, ondelete='cascade')
+    primary_color = fields.Char(default='#4F46E5')
+    secondary_color = fields.Char(default='#7C3AED')
+    background_color = fields.Char(default='#FFFFFF')
+    logo = fields.Binary(attachment=True)
+    logo_url = fields.Char(string='Logo URL')
+    favicon = fields.Binary(attachment=True)
+    app_name = fields.Char(default='EnCoach')
+    white_label_domain = fields.Char(string='Subdomain')
+    login_title = fields.Char(default='Welcome to EnCoach')
+    login_description = fields.Text()
+    custom_css = fields.Text()
+
+    _entity_unique = models.Constraint('UNIQUE(entity_id)', 'Branding record must be unique per entity.')
+
+    def to_api_dict(self):
+        self.ensure_one()
+        return {
+            'id': self.id,
+            'entity_id': self.entity_id.id,
+            'entity_name': self.entity_id.name,
+            'primary_color': self.primary_color,
+            'secondary_color': self.secondary_color,
+            'background_color': self.background_color or '#FFFFFF',
+            'has_logo': bool(self.logo),
+            'logo_url': self.logo_url or '',
+            'has_favicon': bool(self.favicon),
+            'app_name': self.app_name,
+            'white_label_domain': self.white_label_domain or '',
+            'login_title': self.login_title or '',
+            'login_description': self.login_description or '',
+            'custom_css': self.custom_css or '',
+        }