Fix disk available space display issue

- Parse available space from df output instead of showing total
- Add availableHuman field to disk metrics response
- Update frontend to display actual available space

Fixes #313

src/backend/ssh/server-stats.ts

@@ -750,6 +750,7 @@ async function collectMetrics(host: SSHHostWithCredentials): Promise<{
       let diskPercent: number | null = null;
       let usedHuman: string | null = null;
       let totalHuman: string | null = null;
+      let availableHuman: string | null = null;
       try {
         const [diskOutHuman, diskOutBytes] = await Promise.all([
           execCommand(client, "df -h -P / | tail -n +2"),
@@ -773,6 +774,7 @@ async function collectMetrics(host: SSHHostWithCredentials): Promise<{
         if (humanParts.length >= 6 && bytesParts.length >= 6) {
           totalHuman = humanParts[1] || null;
           usedHuman = humanParts[2] || null;
+          availableHuman = humanParts[3] || null; // Parse Available column from df output
 
           const totalBytes = Number(bytesParts[1]);
           const usedBytes = Number(bytesParts[2]);
@@ -796,6 +798,7 @@ async function collectMetrics(host: SSHHostWithCredentials): Promise<{
         diskPercent = null;
         usedHuman = null;
         totalHuman = null;
+        availableHuman = null;
       }
 
       const result = {
@@ -805,7 +808,12 @@ async function collectMetrics(host: SSHHostWithCredentials): Promise<{
           usedGiB: usedGiB ? toFixedNum(usedGiB, 2) : null,
           totalGiB: totalGiB ? toFixedNum(totalGiB, 2) : null,
         },
-        disk: { percent: toFixedNum(diskPercent, 0), usedHuman, totalHuman },
+        disk: {
+          percent: toFixedNum(diskPercent, 0),
+          usedHuman,
+          totalHuman,
+          availableHuman, // Include available space in response
+        },
       };
 
       metricsCache.set(host.id, result);

src/ui/Desktop/Apps/Server/Server.tsx

@@ -434,10 +434,9 @@ export function Server({
 
                     <div className="text-xs text-gray-500">
                       {(() => {
-                        const used = metrics?.disk?.usedHuman;
+                        const available = metrics?.disk?.availableHuman;
-                        const total = metrics?.disk?.totalHuman;
+                        return available
-                        return used && total
+                          ? `Available: ${available}`
-                          ? `Available: ${total}`
                           : "Available: N/A";
                       })()}
                     </div>

src/ui/main-axios.ts

@@ -51,6 +51,7 @@ interface DiskMetrics {
   percent: number | null;
   usedHuman: string | null;
   totalHuman: string | null;
+  availableHuman?: string | null; // Available disk space from df output
 }
 
 export type ServerMetrics = {