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_signup/models/student_profile.py

@@ -0,0 +1,52 @@
+import json
+
+from odoo import models, fields, api
+
+
+class EncoachStudentProfile(models.Model):
+    _name = 'encoach.student.profile'
+    _description = 'Student Onboarding Profile'
+
+    user_id = fields.Many2one('res.users', required=True, ondelete='cascade', index=True)
+    cefr_level = fields.Selection([
+        ('pre_a1', 'Pre-A1'),
+        ('a1', 'A1'),
+        ('a2', 'A2'),
+        ('b1', 'B1'),
+        ('b2', 'B2'),
+        ('c1', 'C1'),
+        ('c2', 'C2'),
+    ])
+    target_band = fields.Float()
+    learning_style = fields.Text(help='JSON array of styles: visual, audio, reading, mixed')
+    learning_goal = fields.Char(size=200)
+    hours_per_week = fields.Integer()
+    study_mode = fields.Selection([
+        ('self_study', 'Self Study'),
+        ('with_teacher', 'With Teacher'),
+    ])
+    exam_date = fields.Date()
+    placement_completed = fields.Boolean(default=False)
+    placement_decision = fields.Selection([
+        ('take_now', 'Take Now'),
+        ('skip', 'Skip'),
+    ])
+    entity_id = fields.Many2one('encoach.entity', ondelete='set null')
+
+    def get_learning_styles(self):
+        """Return learning_style as a Python list."""
+        self.ensure_one()
+        if not self.learning_style:
+            return []
+        try:
+            return json.loads(self.learning_style)
+        except (json.JSONDecodeError, TypeError):
+            return [self.learning_style] if self.learning_style else []
+
+    def set_learning_styles(self, styles):
+        """Accept a list of styles and store as JSON."""
+        self.ensure_one()
+        if isinstance(styles, list):
+            self.learning_style = json.dumps(styles)
+        elif isinstance(styles, str):
+            self.learning_style = json.dumps([styles])