Fix atuin-pick: resolve atuin outside kitty PATH, rename to atuin-pick

dot_local/bin/executable_atuin-pick

@@ -4,20 +4,24 @@
 atuin search -i draws its TUI on the tty and prints the selected command
 to stdout (Esc prints nothing). Filter to history from the current
 directory. Run the selection with rc loaded so aliases and functions
-resolve, then drop to an interactive shell.
+resolve — its output stays in this split — then drop to an interactive
+shell.
 """
 import os
+import shutil
 import subprocess
 import sys
 
-# kitty launches this outside a shell, so atuin's init never ran.
+# kitty's launch env has neither ~/.atuin/bin on PATH nor ATUIN_SESSION
+# (atuin's shell init never ran), so resolve and seed both here.
+atuin = shutil.which("atuin") or os.path.expanduser("~/.atuin/bin/atuin")
 if "ATUIN_SESSION" not in os.environ:
     os.environ["ATUIN_SESSION"] = subprocess.run(
-        ["atuin", "uuid"], stdout=subprocess.PIPE, text=True
+        [atuin, "uuid"], stdout=subprocess.PIPE, text=True
     ).stdout.strip()
 
 sel = subprocess.run(
-    ["atuin", "search", "-i", "--filter-mode", "directory"],
+    [atuin, "search", "-i", "--filter-mode", "directory"],
     stdout=subprocess.PIPE,
     text=True,
 ).stdout.strip()