fix(app): harden account and workflow state

JobTrackerApi/Controllers/JobApplicationsController.cs

@@ -473,6 +473,7 @@ Canonical profile:
             [FromQuery] int? companyId = null,
             [FromQuery] string? location = null,
             [FromQuery] bool needsFollowUp = false,
+            [FromQuery] string? readiness = null,
             [FromQuery] bool includeDeleted = false,
             [FromQuery] bool deletedOnly = false,
             [FromQuery] string? sortBy = null,
@@ -482,6 +483,9 @@ Canonical profile:
         {
             if (page < 1) page = 1;
             if (pageSize is not (15 or 20 or 25)) pageSize = 15;
+            var readinessFilter = (readiness ?? string.Empty).Trim().ToLowerInvariant();
+            if (readinessFilter is not ("" or "needs-work" or "interview"))
+                return BadRequest("Readiness must be 'needs-work' or 'interview'.");
 
             var query = _db.JobApplications
                 .AsNoTracking()
@@ -542,16 +546,25 @@ Canonical profile:
             var dirDesc = string.Equals(sortDir, "desc", StringComparison.OrdinalIgnoreCase);
             var key = (sortBy ?? "dateApplied").Trim();
 
-            if (needsFollowUp)
+            if (needsFollowUp || readinessFilter.Length > 0)
             {
-                // NeedsFollowUp depends on rules + last correspondence date; evaluate in memory so filtering is correct.
+                // Both filters depend on rule evaluation and workflow signals that include normalized
+                // note content, so evaluate before pagination to keep totals/pages correct.
                 var pre = await query.ToListAsync(cancellationToken);
                 var filtered = new List<JobApplication>();
                 foreach (var j in pre)
                 {
                     lastMsg.TryGetValue(j.Id, out var lm);
                     var d = RulesEngine.Evaluate(settings, j, now, lm);
-                    if (d.NeedsFollowUp) filtered.Add(j);
+                    var signal = BuildWorkflowSignal(j, d);
+                    var matchesFollowUp = !needsFollowUp || d.NeedsFollowUp;
+                    var matchesReadiness = readinessFilter switch
+                    {
+                        "interview" => signal.NeedsInterviewPrep,
+                        "needs-work" => signal.HasPackageGap || signal.NeedsInterviewPrep,
+                        _ => true,
+                    };
+                    if (matchesFollowUp && matchesReadiness) filtered.Add(j);
                 }
 
                 filtered = key switch