Fixed(cli):

- `ls` and `mirror` commands now provide informative feedback when no documents are found or filters skip all files, resolving the issue where they would exit silently (#860).
- The command-line argument `vault` has been renamed to a more appropriate name, `databaseDir`.
- The `mirror` command now accepts a `vault` directory, which specifies the location where the actual files are stored. For compatibility reasons, the previous behaviour is still supported.

Co-authored-by: Copilot <copilot@github.com>

src/apps/cli/test/repro-issue-860.sh

@@ -0,0 +1,49 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+SCRIPT_DIR="$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")" && pwd)"
+CLI_DIR="$(cd -- "$SCRIPT_DIR/.." && pwd)"
+cd "$CLI_DIR"
+source "$SCRIPT_DIR/test-helpers.sh"
+
+display_test_info "Test for Issue #860: Empty output from ls and mirror"
+
+RUN_BUILD="${RUN_BUILD:-1}"
+cli_test_init_cli_cmd
+
+WORK_DIR="$(mktemp -d "${TMPDIR:-/tmp}/livesync-repro-860.XXXXXX")"
+trap 'rm -rf "$WORK_DIR"' EXIT
+
+SETTINGS_FILE="$WORK_DIR/data.json"
+VAULT_DIR="$WORK_DIR/vault"
+mkdir -p "$VAULT_DIR"
+
+if [[ "$RUN_BUILD" == "1" ]]; then
+    echo "[INFO] building CLI..."
+    npm run build
+fi
+
+echo "[INFO] generating settings -> $SETTINGS_FILE"
+cli_test_init_settings_file "$SETTINGS_FILE"
+
+# 1. Test 'ls' on empty database
+echo "[INFO] Testing 'ls' on empty database..."
+LS_OUTPUT=$(run_cli "$VAULT_DIR" --settings "$SETTINGS_FILE" ls)
+if [[ -z "$LS_OUTPUT" ]]; then
+    echo "[REPRODUCED] 'ls' returned empty output for empty database."
+else
+    echo "[INFO] 'ls' output: $LS_OUTPUT"
+fi
+
+# 2. Test 'mirror' on empty vault
+echo "[INFO] Testing 'mirror' on empty vault..."
+MIRROR_OUTPUT=$(run_cli "$VAULT_DIR" --settings "$SETTINGS_FILE" mirror 2>&1)
+if [[ "$MIRROR_OUTPUT" == *"[Command] mirror"* ]] && [[ ! "$MIRROR_OUTPUT" == *"[Mirror]"* ]]; then
+     # Note: currently it prints [Command] mirror to stderr.
+     # Let's see if it prints anything else.
+    echo "[REPRODUCED] 'mirror' produced no functional logs (only command header)."
+else
+    echo "[INFO] 'mirror' output: $MIRROR_OUTPUT"
+fi
+
+echo "[DONE] finished repro-860 test"