fix(fastapi): remove duplicate confirm/reject routes

- api_confirm and api_reject were defined twice on same paths
- FastAPI only registers first definition, causing silent 404s
- Kept api_confirm_engram and api_reject_engram (use _update_correctness)
- Removed duplicate direct DB implementations
- Fixes dashboard confirm/reject buttons not working

fastapi_app.py

@@ -690,72 +690,6 @@ def api_refresh_engram(engram_id: str):
         return JSONResponse({"error": str(e)}, status_code=404)
 
 
-@app.post("/api/engrams/{engram_id}/confirm")
-def api_confirm(engram_id: str, reason: str = Form("")):
-    conn = get_db()
-    c = conn.cursor()
-    row = c.execute(
-        "SELECT correctness_json FROM engrams WHERE id = ?", (engram_id,)
-    ).fetchone()
-    if not row:
-        conn.close()
-        return JSONResponse({"error": "Not found"}, status_code=404)
-
-    correctness = json.loads(row["correctness_json"] or "{}")
-    correctness["confirmed"] = True
-    correctness["confirmations"] = correctness.get("confirmations", 0) + 1
-    correctness["last_reviewed"] = datetime.now(timezone.utc).isoformat()
-    review_history = correctness.get("review_history", [])
-    review_history.append({
-        "by": "web",
-        "action": "confirm",
-        "at": datetime.now(timezone.utc).isoformat(),
-        "note": reason or "confirmed via dashboard",
-    })
-    correctness["review_history"] = review_history
-
-    c.execute(
-        "UPDATE engrams SET correctness_json = ?, modified_at = ? WHERE id = ?",
-        (json.dumps(correctness), datetime.now(timezone.utc).isoformat(), engram_id),
-    )
-    conn.commit()
-    conn.close()
-    return {"success": True, "engram_id": engram_id}
-
-
-@app.post("/api/engrams/{engram_id}/reject")
-def api_reject(engram_id: str, reason: str = Form("")):
-    conn = get_db()
-    c = conn.cursor()
-    row = c.execute(
-        "SELECT correctness_json FROM engrams WHERE id = ?", (engram_id,)
-    ).fetchone()
-    if not row:
-        conn.close()
-        return JSONResponse({"error": "Not found"}, status_code=404)
-
-    correctness = json.loads(row["correctness_json"] or "{}")
-    correctness["confirmed"] = False
-    correctness["rejections"] = correctness.get("rejections", 0) + 1
-    correctness["last_reviewed"] = datetime.now(timezone.utc).isoformat()
-    review_history = correctness.get("review_history", [])
-    review_history.append({
-        "by": "web",
-        "action": "reject",
-        "at": datetime.now(timezone.utc).isoformat(),
-        "note": reason or "rejected via dashboard",
-    })
-    correctness["review_history"] = review_history
-
-    c.execute(
-        "UPDATE engrams SET correctness_json = ?, modified_at = ? WHERE id = ?",
-        (json.dumps(correctness), datetime.now(timezone.utc).isoformat(), engram_id),
-    )
-    conn.commit()
-    conn.close()
-    return {"success": True, "engram_id": engram_id}
-
-
 @app.post("/api/engrams/{engram_id}/refresh")
 def api_refresh(engram_id: str):
     conn = get_db()