First working POC

src-tauri/src/commands/conversions.rs

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+//! Tauri commands for unit conversions and formatting
+//!
+//! These commands expose conversion utilities to the frontend,
+//! allowing centralized conversion logic in Rust.
+
+use crate::utils::conversions::{
+    format_time, format_time_long, calculate_progress,
+    ticks_to_seconds, percent_to_volume,
+};
+
+/// Format time in seconds to MM:SS display string
+///
+/// # Arguments
+/// * `seconds` - Time in seconds
+///
+/// # Returns
+/// Formatted string like "3:45" or "12:09"
+#[tauri::command]
+pub fn format_time_seconds(seconds: f64) -> String {
+    format_time(seconds)
+}
+
+/// Format time in seconds to HH:MM:SS or MM:SS display string
+///
+/// Automatically chooses format based on duration:
+/// - Less than 1 hour: Returns MM:SS format
+/// - 1 hour or more: Returns HH:MM:SS format
+///
+/// # Arguments
+/// * `seconds` - Time in seconds
+///
+/// # Returns
+/// Formatted string like "1:23:45" or "3:45"
+#[tauri::command]
+pub fn format_time_seconds_long(seconds: f64) -> String {
+    format_time_long(seconds)
+}
+
+/// Convert Jellyfin ticks to seconds
+///
+/// # Arguments
+/// * `ticks` - Time in Jellyfin ticks (10,000,000 ticks = 1 second)
+///
+/// # Returns
+/// Time in seconds
+#[tauri::command]
+pub fn convert_ticks_to_seconds(ticks: i64) -> f64 {
+    ticks_to_seconds(ticks)
+}
+
+/// Calculate progress percentage from position and duration
+///
+/// # Arguments
+/// * `position` - Current position in seconds
+/// * `duration` - Total duration in seconds
+///
+/// # Returns
+/// Progress as percentage (0.0 to 100.0)
+#[tauri::command]
+pub fn calc_progress(position: f64, duration: f64) -> f64 {
+    calculate_progress(position, duration)
+}
+
+/// Convert percentage volume (0-100) to normalized (0.0-1.0)
+///
+/// # Arguments
+/// * `percent` - Volume as percentage (0 to 100)
+///
+/// # Returns
+/// Normalized volume (0.0 to 1.0)
+#[tauri::command]
+pub fn convert_percent_to_volume(percent: f64) -> f64 {
+    percent_to_volume(percent)
+}