Drop the icon sample row; give tool panes a working PATH and a reason to stay open; answer the open questions

tui/toolpane.go

@@ -36,7 +36,9 @@ var tools = []tool{
 	{"yazi", "yazi", "files"},
 	{"nvim", "nvim", "editing one file"},
 	{"fzf", "fzf", "picking anything"},
-	{"ocr", "ocr review", "the review of the current change, in the terminal"},
+	// A review that finds nothing exits in a second, which looks like a broken
+	// pane. It is given a last line so the output can be read before closing.
+	{"ocr", "ocr review --color never; printf '\\npress enter to close\\n'; read -r _", "the review of the current change"},
 }
 
 // currentWorkspace finds the workspace this program is drawn in. TUIOS knows;
@@ -96,8 +98,13 @@ func openTool(folder, name string) error {
 	}
 	log, _ := os.Create(filepath.Join(os.TempDir(), "paperclip-harness-tool.log"))
 
+	// A pane started this way gets a smaller PATH than an interactive shell, so
+	// the places a person's tools actually live are put back before the tool
+	// runs. Without this, ocr is "command not found" inside its own pane.
+	prelude := `export PATH="$HOME/.local/bin:$HOME/.nix-profile/bin:` +
+		`/run/current-system/sw/bin:/etc/profiles/per-user/$USER/bin:$PATH"; `
 	cmd := exec.Command("tuios", "new-window", chosen.name, "-s", session,
-		"--workspace", ws, "--cwd", folder, "--", "/bin/sh", "-c", chosen.command)
+		"--workspace", ws, "--cwd", folder, "--", "/bin/sh", "-c", prelude+chosen.command)
 	cmd.Stdout = log
 	cmd.Stderr = log
 	cmd.SysProcAttr = &syscall.SysProcAttr{Setsid: true}