Don't let a failed index.html backup block the injection

On linuxserver/jellyfin the web folder belongs to root, so copying
index.html to index.html.sharelinks.bak threw even when index.html itself
was writable, and the ShareLink action never got injected. The backup is
best-effort now.

Bump to 1.0.7.0.

Jellyfin.Plugin.ShareLinks/Jellyfin.Plugin.ShareLinks.csproj

@@ -6,9 +6,9 @@
     <LangVersion>latest</LangVersion>
     <RootNamespace>Jellyfin.Plugin.ShareLinks</RootNamespace>
     <AssemblyName>Jellyfin.Plugin.ShareLinks</AssemblyName>
-    <Version>1.0.6.0</Version>
+    <Version>1.0.7.0</Version>
-    <AssemblyVersion>1.0.6.0</AssemblyVersion>
+    <AssemblyVersion>1.0.7.0</AssemblyVersion>
-    <FileVersion>1.0.6.0</FileVersion>
+    <FileVersion>1.0.7.0</FileVersion>
     <GenerateAssemblyInfo>true</GenerateAssemblyInfo>
     <TreatWarningsAsErrors>false</TreatWarningsAsErrors>
     <ImplicitUsings>disable</ImplicitUsings>

Jellyfin.Plugin.ShareLinks/Web/WebInjectionHostedService.cs

@@ -70,11 +70,7 @@ public sealed class WebInjectionHostedService : IHostedService
             return;
         }
 
-        var backup = path + ".sharelinks.bak";
+        TryBackup(path, path + ".sharelinks.bak");
-        if (!File.Exists(backup))
-        {
-            File.Copy(path, backup);
-        }
 
         var snippet = "\n" + Begin + "\n<script src=\"/ShareLinks/ClientScript\" defer></script>\n" + End + "\n";
         var bodyIndex = html.LastIndexOf("</body>", StringComparison.OrdinalIgnoreCase);
@@ -84,4 +80,21 @@ public sealed class WebInjectionHostedService : IHostedService
         _logger.LogInformation("ShareLinks: injected client script into {Path}.", path);
     }
 
+    private void TryBackup(string path, string backup)
+    {
+        // The backup is only a convenience. Some images (linuxserver) make the
+        // web folder root-owned while index.html itself is writable, so a
+        // failed copy must not stop the injection.
+        try
+        {
+            if (!File.Exists(backup))
+            {
+                File.Copy(path, backup);
+            }
+        }
+        catch (Exception ex) when (ex is UnauthorizedAccessException or IOException)
+        {
+            _logger.LogDebug(ex, "ShareLinks: could not back up {Path}, injecting without a backup.", path);
+        }
+    }
 }

Jellyfin.Plugin.ShareLinks/meta.json

@@ -1,12 +1,12 @@
 {
   "guid": "68540b76-ee74-436d-85ff-2abc884bbea6",
   "name": "ShareLinks",
-  "version": "1.0.6.0",
+  "version": "1.0.7.0",
   "targetAbi": "10.11.0.0",
   "framework": "net9.0",
   "owner": "Franciskid",
   "overview": "Secure expiring guest-share links for Jellyfin items.",
   "description": "Adds secure, expiring share links for Jellyfin items with JSON-backed storage, token hashing, and cleanup scaffolding.",
   "category": "General",
-  "timestamp": "2026-09-18T12:00:00.0000000Z"
+  "timestamp": "2026-09-18T14:00:00.0000000Z"
 }