Update admin theme/layout and refresh README details.

Align the project baseline with the latest admin interface styling and layout structure while documenting setup and usage updates in README.

apps/api/app/modules/auth/schemas.py

@@ -0,0 +1,69 @@
+from pydantic import BaseModel, EmailStr, Field, field_validator
+
+from app.core.password_policy import validate_password_strength
+
+
+class RegisterIn(BaseModel):
+    email: EmailStr
+    password: str = Field(min_length=8)
+
+    @field_validator("email", "password", mode="before")
+    @classmethod
+    def strip_whitespace(cls, value: str) -> str:
+        if isinstance(value, str):
+            return value.strip()
+        return value
+
+    @field_validator("password")
+    @classmethod
+    def password_policy(cls, value: str) -> str:
+        return validate_password_strength(value)
+
+
+class LoginIn(BaseModel):
+    email: EmailStr
+    password: str = Field(min_length=8)
+
+    @field_validator("email", "password", mode="before")
+    @classmethod
+    def strip_whitespace(cls, value: str) -> str:
+        if isinstance(value, str):
+            return value.strip()
+        return value
+
+
+class VerifyEmailIn(BaseModel):
+    token: str
+
+
+class ForgotPasswordIn(BaseModel):
+    email: EmailStr
+
+
+class ResendVerificationIn(BaseModel):
+    email: EmailStr
+
+
+class ResetPasswordIn(BaseModel):
+    token: str
+    new_password: str = Field(min_length=8)
+
+    @field_validator("new_password")
+    @classmethod
+    def password_policy(cls, value: str) -> str:
+        return validate_password_strength(value)
+
+
+class AuthUserOut(BaseModel):
+    id: str
+    email: EmailStr
+    role: str
+    is_superuser: bool
+    status: str
+
+
+class LoginOut(BaseModel):
+    access_token: str
+    token_type: str = "bearer"
+    expires_in: int = 900
+    user: AuthUserOut