Replace all geheim path/name defaults with foostore

- Default data_dir: ~/git/geheimlager → ~/git/foostore-data
- Default export_dir: ~/.geheimlagerexport → ~/.foostore-export
- Default key_file: ~/.geheimlager.key → ~/.foostore.key
- Rename env var GEHEIM_SHELL → FOOSTORE_SHELL
- Update package-level comments across cli, shell, store, git, config
- Update Magefile and CLAUDE.md docs to reflect new paths

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

1 files changed, 3 insertions, 3 deletions

diff --git a/internal/cli/cli.go b/internal/cli/cli.go
index fb76e90..ef00010 100644
--- a/internal/cli/cli.go
+++ b/internal/cli/cli.go
@@ -1,4 +1,4 @@
-// Package cli implements the command-line interface for geheim.
+// Package cli implements the command-line interface for foostore.
 // It mirrors the Ruby CLI class (geheim.rb lines 551-713): parsing argv,
 // dispatching commands, and running an optional interactive readline shell.
 // Run() is the top-level entry point called by cmd/foostore/main.go.
@@ -138,10 +138,10 @@ func readPIN() (string, error) {
 // run dispatches a single command (when argv is non-empty and no shell flag is
 // set) or enters the interactive shell loop.  Returns an exit code.
 func (c *CLI) run(ctx context.Context, argv []string) int {
-	// Enter shell mode when: no arguments, $GEHEIM_SHELL is set, or the first
+	// Enter shell mode when: no arguments, $FOOSTORE_SHELL is set, or the first
 	// argument is "shell".  Mirrors the Ruby shell_loop entry conditions.
 	enterShell := len(argv) == 0 ||
-		os.Getenv("GEHEIM_SHELL") != "" ||
+		os.Getenv("FOOSTORE_SHELL") != "" ||
 		(len(argv) > 0 && argv[0] == "shell")
 
 	if enterShell {