refactor: rewrite in rust

src/cli/args.rs

@@ -0,0 +1,40 @@
+use clap::{Parser, Subcommand};
+use clap_complete::Shell;
+
+#[derive(Parser)]
+#[command(name = "streamd")]
+#[command(
+    author,
+    version,
+    about = "Personal knowledge management and time-tracking CLI using @Tag annotations"
+)]
+pub struct Cli {
+    #[command(subcommand)]
+    pub command: Option<Commands>,
+}
+
+#[derive(Subcommand)]
+pub enum Commands {
+    /// Create a new stream file
+    New,
+
+    /// Display open tasks
+    Todo,
+
+    /// Edit a stream file by position
+    Edit {
+        /// Position of the file to edit (0 = most recent, negative = from oldest)
+        #[arg(default_value = "1")]
+        number: i32,
+    },
+
+    /// Display extracted timesheets
+    Timesheet,
+
+    /// Generate shell completions
+    Completions {
+        /// Shell to generate completions for
+        #[arg(value_enum)]
+        shell: Shell,
+    },
+}