feat(adminui): inline script-source editor in the virtual-tag modal

src/Server/ZB.MOM.WW.OtOpcUa.AdminUI/Uns/UnsTreeService.cs

@@ -1,3 +1,5 @@
+using System.Security.Cryptography;
+using System.Text;
 using Microsoft.EntityFrameworkCore;
 using ZB.MOM.WW.OtOpcUa.Configuration;
 using ZB.MOM.WW.OtOpcUa.Configuration.Entities;
@@ -1014,6 +1016,67 @@ public sealed class UnsTreeService(IDbContextFactory<OtOpcUaConfigDbContext> dbF
         }
     }
 
+    /// <inheritdoc />
+    public async Task<(string SourceCode, byte[] RowVersion, string Name)?> GetScriptSourceAsync(
+        string scriptId,
+        CancellationToken ct = default)
+    {
+        await using var db = await dbFactory.CreateDbContextAsync(ct);
+
+        var row = await db.Scripts
+            .AsNoTracking()
+            .Where(s => s.ScriptId == scriptId)
+            .Select(s => new { s.SourceCode, s.RowVersion, s.Name })
+            .FirstOrDefaultAsync(ct);
+
+        return row is null ? null : (row.SourceCode, row.RowVersion, row.Name);
+    }
+
+    /// <inheritdoc />
+    public async Task<int> CountVirtualTagsUsingScriptAsync(string scriptId, CancellationToken ct = default)
+    {
+        await using var db = await dbFactory.CreateDbContextAsync(ct);
+        return await db.VirtualTags.CountAsync(v => v.ScriptId == scriptId, ct);
+    }
+
+    /// <inheritdoc />
+    public async Task<(bool Ok, string? Error)> UpdateScriptSourceAsync(
+        string scriptId,
+        string sourceCode,
+        byte[] rowVersion,
+        CancellationToken ct = default)
+    {
+        await using var db = await dbFactory.CreateDbContextAsync(ct);
+
+        var entity = await db.Scripts.FirstOrDefaultAsync(s => s.ScriptId == scriptId, ct);
+        if (entity is null)
+        {
+            return (false, "Script not found.");
+        }
+
+        db.Entry(entity).Property(e => e.RowVersion).OriginalValue = rowVersion;
+
+        entity.SourceCode = sourceCode;
+        entity.SourceHash = HashSource(sourceCode);
+
+        try
+        {
+            await db.SaveChangesAsync(ct);
+            return (true, null);
+        }
+        catch (DbUpdateConcurrencyException)
+        {
+            return (false, "This script was changed by someone else. Reload and try again.");
+        }
+    }
+
+    /// <summary>
+    /// Computes the SHA-256 of a script body as lower-case hex — the same algorithm the Script-edit
+    /// page uses, so a body saved from either surface yields an identical compile-cache key.
+    /// </summary>
+    private static string HashSource(string source) =>
+        Convert.ToHexStringLower(SHA256.HashData(Encoding.UTF8.GetBytes(source)));
+
     /// <summary>
     /// Validates a virtual tag's script binding and trigger configuration (mirrors the DbContext CHECK
     /// constraints): a script must be chosen, at least one of change-trigger / timer must be set, and a