Handle unknown lexer, remove dead _THEMES list, tighten JSON detection - Catch unknown Pygments lexer names and fall back to plain text - Remove unused _THEMES list from cli.py - Only auto-detect JSON when content starts with { or [ to avoid false positives on trivial values like strings or numbers

src/rp/cli.py

@@ -20,22 +20,6 @@ app = typer.Typer(
     rich_markup_mode="rich",
 )
 
-_THEMES = [
-    "monokai",
-    "github-dark",
-    "one-dark",
-    "vim",
-    "vs",
-    "nord",
-    "dracula",
-    "solarized-dark",
-    "solarized-light",
-    "default",
-    "friendly",
-    "native",
-    "emacs",
-]
-
 
 def version_callback(value: bool) -> None:
     if value: