fix(types): concrete generics (dict[str,int]/dict[str,str]); fix Text.assemble; mypy green

Author: CoderDeltaLAN

src/diff_risk_dashboard/cli.py

@@ -87,7 +87,7 @@ def bar(n: int) -> str:
         w = max(1, round(n / maxc * bar_w))
         return "█" * w
 
-    title = Text.assemble(  # type: ignore[arg-type]
+    title = Text.assemble(
         ("Diff Risk Dashboard ", "bold"),
         (emoji + " ",),
         ("— Worst: ", "dim"),