feat: improve reminders summarizer output and system metadata handling

JobTrackerApi/Controllers/AdminSystemController.cs

@@ -40,6 +40,21 @@ public sealed class AdminSystemController : ControllerBase
         SummarizerMetrics Summarizer
     );
 
+    private static string? NormalizeBuildMetadata(string? value)
+    {
+        var trimmed = (value ?? string.Empty).Trim();
+        if (string.IsNullOrWhiteSpace(trimmed)) return null;
+
+        // Ignore unresolved shell/compose placeholders that would otherwise leak
+        // directly into the admin UI, e.g. $(git rev-parse --short HEAD) or ${APP_COMMIT_SHA}.
+        if ((trimmed.StartsWith("$(") && trimmed.EndsWith(")")) || (trimmed.StartsWith("${") && trimmed.EndsWith("}")))
+        {
+            return null;
+        }
+
+        return trimmed;
+    }
+
     [HttpPost("summarizer/probe")]
     public async Task<IActionResult> RunSummarizerProbe(CancellationToken cancellationToken)
     {
@@ -57,13 +72,14 @@ public sealed class AdminSystemController : ControllerBase
         var companies = await _db.Companies.AsNoTracking().CountAsync(cancellationToken);
         var summarizer = await _summarizer.GetMetricsAsync(cancellationToken);
 
-        var version = (_cfg["App:Version"] ?? "").Trim();
+        var version = NormalizeBuildMetadata(_cfg["App:Version"]);
         if (string.IsNullOrWhiteSpace(version))
         {
             version = Assembly.GetExecutingAssembly().GetName().Version?.ToString() ?? "unknown";
         }
-        var commitSha = (_cfg["App:CommitSha"] ?? "").Trim();
-        var buildStamp = (_cfg["App:BuildStamp"] ?? "").Trim();
+
+        var commitSha = NormalizeBuildMetadata(_cfg["App:CommitSha"]);
+        var buildStamp = NormalizeBuildMetadata(_cfg["App:BuildStamp"]);
 
         return Ok(new SystemStatusDto(
             Environment: _env.EnvironmentName,
@@ -82,11 +98,11 @@ public sealed class AdminSystemController : ControllerBase
             ),
             Email: new EmailStatusDto(
                 Enabled: _cfg.GetValue("Email:Enabled", false),
-                Host: (_cfg["Email:SmtpHost"] ?? "").Trim(),
+                Host: (_cfg["Email:SmtpHost"] ?? string.Empty).Trim(),
                 Port: _cfg.GetValue("Email:SmtpPort", 587),
                 EnableSsl: _cfg.GetValue("Email:SmtpEnableSsl", true),
-                From: (_cfg["Email:From"] ?? "").Trim(),
-                FromName: (_cfg["Email:FromName"] ?? "").Trim()
+                From: (_cfg["Email:From"] ?? string.Empty).Trim(),
+                FromName: (_cfg["Email:FromName"] ?? string.Empty).Trim()
             ),
             Summarizer: summarizer
         ));