Add initial project files

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

backend/app/routers/public.py

@@ -0,0 +1,41 @@
+from fastapi import APIRouter, Depends
+from sqlalchemy.ext.asyncio import AsyncSession
+from sqlalchemy import select
+
+from app.dependencies import get_db
+from app.models.user import User
+from app.models.entry import Entry, EntryType
+from app.schemas.entry import PublicUserStats
+
+router = APIRouter(prefix="/api/public", tags=["public"])
+
+
+@router.get("/stats", response_model=list[PublicUserStats])
+async def public_stats(db: AsyncSession = Depends(get_db)):
+    users_result = await db.execute(select(User))
+    users = users_result.scalars().all()
+
+    stats: list[PublicUserStats] = []
+    for user in users:
+        entries_result = await db.execute(select(Entry).where(Entry.user_id == user.id))
+        entries = entries_result.scalars().all()
+
+        adds = [e for e in entries if e.entry_type == EntryType.add]
+        removes = [e for e in entries if e.entry_type == EntryType.remove]
+
+        total_add_shots = sum(e.amount_shots for e in adds)
+        total_remove_shots = sum(e.amount_shots for e in removes)
+        current_total = total_add_shots - total_remove_shots
+
+        weighted_proof_sum = sum(e.proof * e.amount_shots for e in adds if e.proof is not None)
+        proof_shot_total = sum(e.amount_shots for e in adds if e.proof is not None)
+        estimated_proof = round(weighted_proof_sum / proof_shot_total, 1) if proof_shot_total > 0 else None
+
+        stats.append(PublicUserStats(
+            display_name=user.display_name or user.email.split("@")[0],
+            total_add_entries=len(adds),
+            current_total_shots=round(current_total, 2),
+            estimated_proof=estimated_proof,
+        ))
+
+    return stats