feature matching for clean extraction

soleprint/artery/veins/jira/main.py

@@ -2,13 +2,35 @@
 Jira Vein - FastAPI app.
 """
 
+from pathlib import Path
+
 from fastapi import FastAPI
+from fastapi.responses import FileResponse, JSONResponse
 from .api.routes import router
 from .core.config import settings
 
 app = FastAPI(title="Jira Vein", version="0.1.0")
 app.include_router(router)
 
+UI = Path(__file__).parent / "ui" / "index.html"
+
+
+@app.get("/ui", include_in_schema=False)
+def ui():
+    """The vein's ad-hoc interface.
+
+    One file, served as-is. Its theme and its parts are baked in by
+    common/theme/bake.py, so this is a plain FileResponse rather than a
+    template: there is nothing left to fill in at request time, and the same
+    bytes open from a double-click when nothing is serving them.
+    """
+    if not UI.is_file():
+        return JSONResponse(
+            {"error": "no ui/index.html", "hint": "run `make theme bake` from the spr root"},
+            status_code=404,
+        )
+    return FileResponse(UI, media_type="text/html")
+
 
 if __name__ == "__main__":
     import uvicorn