feat: multi-source disk entries with chips display

diskUsage now carries Sources []string instead of a single Source.
collectDiskUsage accumulates all sources (samba, nfs, manual) per path.
NFS no longer adds a redundant label to used_by.

Dashboard and Settings render one chip per source. When a path
is shared via SMB and NFS, both chips appear.

API breaking: disks[].source replaced by disks[].sources[].
Version: 0.2.1 -> 0.3.0

web/src/pages/Dashboard.tsx

@@ -2,6 +2,18 @@ import { useEffect, useState } from "react";
 import { api, formatBytes, SystemStatus } from "../api";
 import { useDirty } from "../DirtyContext";
 
+const SOURCE_COLORS: Record<string, string> = {
+  samba:  "bg-emerald-500/20 text-emerald-300",
+  nfs:     "bg-amber-500/20 text-amber-300",
+  manual:  "bg-cyan-500/20 text-cyan-300",
+};
+
+const SOURCE_LABELS: Record<string, string> = {
+  samba:  "SMB",
+  nfs:    "NFS",
+  manual: "Vigilado",
+};
+
 export default function Dashboard() {
   const [status, setStatus] = useState<SystemStatus | null>(null);
   const { modules } = useDirty();
@@ -11,7 +23,7 @@ export default function Dashboard() {
   }, []);
 
   const visibleDisks = status?.disks.filter(
-    (d) => d.source === "manual" || d.source === "samba" || d.source === "nfs"
+    (d) => d.sources.includes("manual") || d.sources.includes("samba") || d.sources.includes("nfs")
   ) ?? [];
 
   return (
@@ -27,9 +39,22 @@ export default function Dashboard() {
             <div className="space-y-4">
               {visibleDisks.map((d) => (
                 <div key={d.path}>
-                  <div className="mb-1 flex justify-between text-sm">
-                    <span className="text-slate-300">{d.path}</span>
-                    <span className="text-slate-400">
+                  <div className="mb-1 flex flex-wrap items-center justify-between gap-x-3 gap-y-1 text-sm">
+                    <div className="flex flex-wrap items-center gap-2">
+                      <span className="text-slate-300">{d.path}</span>
+                      {d.sources.map((s) => (
+                        <span
+                          key={s}
+                          className={`rounded-full px-2 py-0.5 text-xs ${SOURCE_COLORS[s] ?? "bg-slate-700 text-slate-300"}`}
+                        >
+                          {SOURCE_LABELS[s] ?? s}
+                        </span>
+                      ))}
+                      {d.used_by && d.used_by.length > 0 && (
+                        <span className="text-xs text-slate-500">{d.used_by.join(", ")}</span>
+                      )}
+                    </div>
+                    <span className="text-slate-400 text-xs">
                       {formatBytes(d.used_bytes)} / {formatBytes(d.total_bytes)}
                     </span>
                   </div>