fix

app/api/sessions.py

@@ -13,6 +13,7 @@ from sqlalchemy import select
 from sqlalchemy.ext.asyncio import AsyncSession
 
 from app.api.deps import get_current_user, get_settings_dict
+from app.config import get_settings
 from app.core.llm import LlmClient, MockLlmClient
 from app.core.logging import get_logger
 from app.db import get_db
@@ -91,6 +92,39 @@ async def get_state(
     }
 
 
+@router.get("/worlds/{world_id}/history")
+async def get_history(
+    world_id: uuid.UUID,
+    before: int | None = None,  # sequence_number to load before (for pagination)
+    limit: int = 20,
+    db: AsyncSession = Depends(get_db),
+    user=Depends(get_current_user),
+) -> dict:
+    """Return full chat history with pagination (for scroll-up loading)."""
+    world = await _load_world(db, world_id, user)
+    stmt = select(Step).where(
+        Step.world_id == world.id, Step.deleted_at.is_(None)
+    )
+    if before is not None:
+        stmt = stmt.where(Step.sequence_number < before)
+    stmt = stmt.order_by(Step.sequence_number.desc()).limit(limit)
+    rows = (await db.execute(stmt)).scalars().all()
+    steps = [
+        {
+            "id": str(s.id), "sequence_number": s.sequence_number,
+            "player_action": s.player_action, "scene_text": s.scene_text,
+            "suggested_actions": s.suggested_actions, "created_at": s.created_at.isoformat(),
+        }
+        for s in reversed(rows)  # oldest first
+    ]
+    has_more = len(rows) == limit
+    return {
+        "steps": steps,
+        "has_more": has_more,
+        "oldest_sequence": steps[0]["sequence_number"] if steps else None,
+    }
+
+
 # --------------------------------------------------------------------------- #
 # World builder stream (SSE)
 # --------------------------------------------------------------------------- #
@@ -107,7 +141,7 @@ async def builder_stream(
         preset = (
             await db.execute(select(WorldPreset).where(WorldPreset.id == world.preset_id))
         ).scalar_one_or_none()
-    emitter = SseEmitter()
+    emitter = SseEmitter(debug=get_settings().debug)
     player_name = (world.environment or {}).get("player", {}).get("name", "Hero")
     notes = world.description
     llm = _llm_factory(settings)
@@ -152,7 +186,7 @@ async def editor_stream(
     settings: dict = Depends(get_settings_dict),
 ) -> StreamingResponse:
     world = await _load_world(db, world_id, user)
-    emitter = SseEmitter()
+    emitter = SseEmitter(debug=get_settings().debug)
     llm = _llm_factory(settings)
 
     async def run_bg():
@@ -234,7 +268,7 @@ async def iterate_stream(
     ).scalar_one_or_none()
     if step is None:
         raise HTTPException(404, "step not found")
-    emitter = SseEmitter()
+    emitter = SseEmitter(debug=get_settings().debug)
     llm = _llm_factory(settings)
 
     async def run_bg():
@@ -349,7 +383,7 @@ async def intro_stream(
     settings: dict = Depends(get_settings_dict),
 ) -> StreamingResponse:
     world = await _load_world(db, world_id, user)
-    emitter = SseEmitter()
+    emitter = SseEmitter(debug=get_settings().debug)
     llm = _llm_factory(settings)
 
     async def run_bg():