chore(release): harden nick contract for v0.1.2

app/schemas/v1.py

@@ -6,7 +6,7 @@ from datetime import date, datetime
 from decimal import Decimal
 from typing import Any, Literal
 
-from pydantic import BaseModel, ConfigDict, Field, model_validator
+from pydantic import BaseModel, ConfigDict, Field, field_validator, model_validator
 
 
 # ---------------------------------------------------------------------------
@@ -322,6 +322,16 @@ class StrategyCreateRequest(BaseModel):
     config: dict[str, Any] = Field(default_factory=dict)
     status: StrategyStatus = "active"
 
+    @field_validator("nick")
+    @classmethod
+    def normalize_nick(cls, value: str | None) -> str | None:
+        if value is None:
+            return None
+        normalized = value.strip()
+        if not normalized:
+            raise ValueError("nick must not be blank")
+        return normalized
+
 
 class StrategyUpdateRequest(BaseModel):
     model_config = ConfigDict(extra="forbid")
@@ -331,6 +341,16 @@ class StrategyUpdateRequest(BaseModel):
     config: dict[str, Any] | None = None
     status: StrategyStatus | None = None
 
+    @field_validator("nick")
+    @classmethod
+    def normalize_nick(cls, value: str | None) -> str | None:
+        if value is None:
+            return None
+        normalized = value.strip()
+        if not normalized:
+            raise ValueError("nick must not be blank")
+        return normalized
+
     @model_validator(mode="after")
     def require_change(self) -> "StrategyUpdateRequest":
         if not self.model_fields_set: