fix: Fix hammerwork-web compilation error on Linux systems v1.7.3

- Fixed type mismatch in memory usage detection for system metrics
- Changed pattern matching from Ok(kb) to Some(kb) for proper Option handling
- Added .ok() conversion to handle Result to Option conversion in parse::<u64>()

This resolves the production deployment compilation error on Linux platforms.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <[email protected]>

Author: CodingAnarchy

hammerwork-web/CHANGELOG.md

@@ -7,6 +7,13 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [1.7.3] - 2025-07-05
+
+### Fixed
+- Fixed compilation error on Linux systems in memory usage detection for system metrics
+  - Changed pattern matching from `Ok(kb)` to `Some(kb)` for Option type
+  - Added `.ok()` conversion after `parse::<u64>()` to properly handle Result to Option conversion
+
 ## [1.5.0] - 2025-07-02
 
 ### Added

hammerwork-web/src/api/system.rs

@@ -433,10 +433,10 @@ fn get_memory_usage() -> Option<u64> {
         if let Ok(contents) = fs::read_to_string("/proc/self/status") {
             for line in contents.lines() {
                 if line.starts_with("VmRSS:") {
-                    if let Ok(kb) = line
+                    if let Some(kb) = line
                         .split_whitespace()
                         .nth(1)
-                        .and_then(|s| s.parse::<u64>())
+                        .and_then(|s| s.parse::<u64>().ok())
                     {
                         return Some(kb * 1024); // Convert KB to bytes
                     }