Add report logos and configurable folder scan depth

Report branding (top-left MSP logo, top-right client logo):
- Add MspLogo to AppSettings; client logo already on TenantProfile
- IUserSessionService.CurrentBranding composes MSP + active profile logo
- New reusable LogoUpload component (InputFile -> base64 LogoData, 512KB cap)
- MSP logo upload in Settings; optional client logo in profile create/edit
- Wire ReportBranding into all 6 HTML export pages
- Fix EditProfile dropping ClientLogo on edit

Storage metrics: expose folder scan depth (0-20) in scan options UI,
passed to existing StorageScanOptions.FolderDepth recursion.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Components/Pages/Storage.razor

@@ -21,6 +21,13 @@
             <input class="form-input" @bind="_siteUrl" placeholder="@Session.CurrentProfile!.TenantUrl" />
         </div>
     </div>
+    <div class="form-row">
+        <div class="form-group" style="max-width:220px">
+            <label class="form-label">Folder scan depth</label>
+            <input class="form-input" type="number" min="0" max="20" @bind="_folderDepth" />
+            <small class="text-muted">0 = libraries only. 1+ = drill into subfolders that many levels deep.</small>
+        </div>
+    </div>
     <div class="form-row">
         <div class="form-group" style="display:flex;align-items:center;gap:16px;padding-top:20px">
             <label><input type="checkbox" @bind="_includeSubsites" /> Include subsites</label>
@@ -81,6 +88,7 @@
 @code {
     private string _siteUrl = string.Empty;
     private bool _includeSubsites, _includeHidden = true, _includeRecycleBin = true;
+    private int _folderDepth;
     private bool _running; private string _status = string.Empty, _error = string.Empty;
     private int _current, _total;
     private List<StorageNode> _results = new();
@@ -94,7 +102,7 @@
         var progress = new Progress<OperationProgress>(p => { _status = p.Message; _current = p.Current; _total = p.Total; InvokeAsync(StateHasChanged); });
         try
         {
-            var opts = new StorageScanOptions(IncludeSubsites: _includeSubsites, IncludeHiddenLibraries: _includeHidden, IncludeRecycleBin: _includeRecycleBin);
+            var opts = new StorageScanOptions(IncludeSubsites: _includeSubsites, FolderDepth: Math.Clamp(_folderDepth, 0, 20), IncludeHiddenLibraries: _includeHidden, IncludeRecycleBin: _includeRecycleBin);
             _results = (await Elevation.RunAsync(async c =>
             {
                 var ctx = await SessionMgr.GetOrCreateContextAsync(siteUrl, Session.CurrentProfile!, c);
@@ -116,7 +124,7 @@
     }
     private async Task ExportHtml()
     {
-        var html = HtmlExport.BuildHtml(_results);
+        var html = HtmlExport.BuildHtml(_results, Session.CurrentBranding);
         await WebExport.DownloadHtmlAsync(html, $"storage_{DateTime.Now:yyyyMMdd_HHmmss}.html");
     }
 }