fix: enable colored loguru output for terminal display (#189)

* fix: enable loguru color output for terminal display

loguru's default handler does not emit ANSI color codes in non-TTY or
certain terminal environments. Explicitly configure a stderr sink with
colorize=True so that log output is colored regardless of the runtime
context.

When logfire is available, the colorized stderr sink is added alongside
the logfire handler so both destinations receive output.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* refactor: move loguru handler setup before try block

Per review feedback, logger.remove() and logger.add(sys.stderr, colorize=True)
are always executed regardless of logfire availability, so move them before
the try block for cleaner control flow.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

---------

Co-authored-by: Meta42 <mi@mideMacBook-Pro.local>
Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

Author: 3 people

src/bub/__main__.py

@@ -2,22 +2,26 @@
 
 from __future__ import annotations
 
+import sys
+
 import typer
 
 from bub.framework import BubFramework
 
 
 def _instrument_bub() -> None:
+    from loguru import logger
+
+    logger.remove()
+    logger.add(sys.stderr, colorize=True)
+
     try:
         import logfire
 
         logfire.configure()
+        logger.add(logfire.loguru_handler())
     except ImportError:
         pass
-    else:
-        from loguru import logger
-
-        logger.configure(handlers=[logfire.loguru_handler()])
 
 
 def create_cli_app() -> typer.Typer: