refactor: Fix import ordering and code formatting with ruff

Organize imports in render.py and scroll.py to meet ruff style requirements.
Add blank lines for code formatting compliance.

engine/app.py

@@ -75,7 +75,9 @@ def _draw_color_picker(themes_list, selected):
     print(CLR, end="")
     print()
 
-    print(f"  {G_HI}▼ COLOR THEME{RST} {W_GHOST}─ ↑/↓ or j/k to move, Enter/q to select{RST}")
+    print(
+        f"  {G_HI}▼ COLOR THEME{RST} {W_GHOST}─ ↑/↓ or j/k to move, Enter/q to select{RST}"
+    )
     print(f"  {W_GHOST}{'─' * (tw() - 4)}{RST}\n")
 
     for i, (theme_id, theme) in enumerate(themes_list):
@@ -341,7 +343,7 @@ def main():
     print()
     _subtitle = {
         "poetry": "literary consciousness stream",
-        "code":   "source consciousness stream",
+        "code": "source consciousness stream",
     }.get(config.MODE, "digital consciousness stream")
     print(f"  {W_DIM}v0.1 · {_subtitle}{RST}")
     print(f"  {W_GHOST}{'─' * (w - 4)}{RST}")
@@ -365,6 +367,7 @@ def main():
         save_cache(items)
     elif config.MODE == "code":
         from engine.fetch_code import fetch_code
+
         slow_print("  > INITIALIZING SOURCE ARRAY...\n")
         time.sleep(0.2)
         print()