Add compare and tui commands with shared sort/filter CLI wiring

- add pubcli compare command to rank nearby stores by filtered deal coverage, bogo count, aggregate score, and distance tie-breaks
- support --count (1-10) for comparison breadth and emit structured JSON/text output with ranked entries
- add robust distance token parsing to tolerate upstream distance string formatting differences
- add pubcli tui interactive terminal browser with paging, deal detail drill-in, and explicit TTY validation for stdin/stdout
- share deal-filter flag registration across root/tui/compare and add --sort support in root execution path
- validate sort mode early and allow canonical aliases (end, expiry, expiration) while preserving explicit invalid-arg guidance
- expand tolerant CLI normalization for new commands/flags and aliases (orderby, sortby, count, bare-flag rewrite for compare/tui)
- update quick-start flag list and integration tests to cover compare help and normalization behavior

cmd/robot_mode.go

@@ -240,12 +240,12 @@ func shouldAutoJSON(args []string, stdoutIsTTY bool) bool {
 
 // knownShorthands maps single-character shorthands to whether they require a value.
 var knownShorthands = map[byte]bool{
-	's': true,  // --store
-	'z': true,  // --zip
-	'c': true,  // --category
-	'd': true,  // --department
-	'q': true,  // --query
-	'n': true,  // --limit
+	's': true, // --store
+	'z': true, // --zip
+	'c': true, // --category
+	'd': true, // --department
+	'q': true, // --query
+	'n': true, // --limit
 }
 
 func firstCommand(args []string) string {
@@ -299,7 +299,7 @@ func printQuickStart(w io.Writer, asJSON bool) error {
 
 	_, err := fmt.Fprintf(
 		w,
-		"%s\nusage: %s\nexamples:\n  %s\n  %s\n  %s\nflags: --zip --store --json --bogo --category --department --query --limit\n",
+		"%s\nusage: %s\nexamples:\n  %s\n  %s\n  %s\nflags: --zip --store --json --bogo --category --department --query --sort --limit\n",
 		help.Name,
 		help.Usage,
 		help.Examples[0],