feat: add omml api

app/schemas/convert.py

@@ -1,4 +1,4 @@
-"""Request and response schemas for markdown to DOCX conversion endpoint."""
+"""Request and response schemas for format conversion endpoints."""
 
 from pydantic import BaseModel, Field, field_validator
 
@@ -17,3 +17,23 @@ class MarkdownToDocxRequest(BaseModel):
             raise ValueError("Markdown content cannot be empty")
         return v
 
+
+class LatexToOmmlRequest(BaseModel):
+    """Request body for LaTeX to OMML conversion endpoint."""
+
+    latex: str = Field(..., description="Pure LaTeX formula (without $ or $$ delimiters)")
+
+    @field_validator("latex")
+    @classmethod
+    def validate_latex_not_empty(cls, v: str) -> str:
+        """Validate that LaTeX formula is not empty."""
+        if not v or not v.strip():
+            raise ValueError("LaTeX formula cannot be empty")
+        return v
+
+
+class LatexToOmmlResponse(BaseModel):
+    """Response body for LaTeX to OMML conversion endpoint."""
+
+    omml: str = Field("", description="OMML (Office Math Markup Language) representation")
+