Update readme and add short parameter

Author: nogo

README.md

@@ -2,7 +2,7 @@
 
 A terminal-based git history visualization tool with live updates and time-based navigation.
 
-![Go](https://img.shields.io/badge/Go-1.24+-00ADD8?logo=go&logoColor=white)
+![Go](https://img.shields.io/badge/Go-1.25+-00ADD8?logo=go&logoColor=white)
 
 ## Why gitree?
 
@@ -67,8 +67,10 @@ gitree /path/to/repo
 gitree ~/projects/myrepo
 
 # With initial filters
-gitree -b main                 # Start with branch filter
-gitree -a "Alice"              # Start with author filter
+gitree -b main                 # Filter by branch
+gitree -a "Alice"              # Filter by author
+gitree -t v1.0.0               # Filter by tag
+gitree -b main -a "Alice"      # Combine filters
 
 # Version and updates
 gitree --version               # Show version info
@@ -162,7 +164,7 @@ go build -o gitree ./cmd/gitree
 
 ## Requirements
 
-- Go 1.24 or later
+- Go 1.25 or later
 - A terminal with 256-color support
 
 ## Dependencies

cmd/gitree/main.go

@@ -30,6 +30,9 @@ func main() {
 	// Short flags
 	flag.BoolVar(showVersion, "v", false, "Show version information")
 	flag.BoolVar(showHelp, "h", false, "Show help message")
+	flag.StringVar(filterBranch, "b", "", "Filter by branch name")
+	flag.StringVar(filterAuthor, "a", "", "Filter by author name")
+	flag.StringVar(filterTag, "t", "", "Filter by tag name")
 
 	flag.Usage = printUsage
 	flag.Parse()
@@ -170,12 +173,12 @@ func printUsage() {
 	fmt.Println("  gitree [flags] [path]")
 	fmt.Println()
 	fmt.Println("Flags:")
-	fmt.Println("  --branch <name>    Filter by branch name")
-	fmt.Println("  --author <name>    Filter by author name")
-	fmt.Println("  --tag <name>       Filter by tag name")
-	fmt.Println("  --version, -v      Show version information")
-	fmt.Println("  --check-update     Check for new releases")
-	fmt.Println("  --help, -h         Show this help message")
+	fmt.Println("  -b, --branch <name>   Filter by branch name")
+	fmt.Println("  -a, --author <name>   Filter by author name")
+	fmt.Println("  -t, --tag <name>      Filter by tag name")
+	fmt.Println("  -v, --version         Show version information")
+	fmt.Println("  --check-update        Check for new releases")
+	fmt.Println("  -h, --help            Show this help message")
 	fmt.Println()
 	fmt.Println("Examples:")
 	fmt.Println("  gitree                      Open current directory")