Add attachment-aware AI drafting and CV section tools

JobTrackerApi/Controllers/ProfileCvController.cs

@@ -36,6 +36,8 @@ public sealed class ProfileCvController : ControllerBase
         _aiService = aiService;
     }
 
+    public sealed record RewriteSectionRequest(string SectionName, string? Style, string? TargetRole);
+
     [HttpPost("upload")]
     [RequestSizeLimit(MaxFileSizeBytes)]
     public async Task<IActionResult> Upload([FromForm] IFormFile file)
@@ -119,6 +121,31 @@ public sealed class ProfileCvController : ControllerBase
         return Ok(new { rebuilt = true, characters = user.ProfileCvText.Length, text = user.ProfileCvText });
     }
 
+    [HttpPost("rewrite-section")]
+    public async Task<IActionResult> RewriteSection([FromBody] RewriteSectionRequest request)
+    {
+        var user = await _users.GetUserAsync(User);
+        if (user is null) return Unauthorized();
+        if (string.IsNullOrWhiteSpace(user.ProfileCvText)) return BadRequest("Add or import CV text before rewriting a section.");
+
+        var sectionName = string.IsNullOrWhiteSpace(request.SectionName) ? "Professional Summary" : request.SectionName.Trim();
+        var style = string.IsNullOrWhiteSpace(request.Style) ? "balanced" : request.Style.Trim();
+        var targetRole = string.IsNullOrWhiteSpace(request.TargetRole) ? null : request.TargetRole.Trim();
+
+        var rewritten = await _aiService.SummarizeSectionAsync(
+            $"Rewrite only the '{sectionName}' section of this CV. Preserve facts, avoid inventing employers or metrics, and output only the rewritten section text. Style: {style}. {(targetRole is not null ? $"Target role: {targetRole}." : "Make it broadly reusable for future tailoring.")}",
+            user.ProfileCvText,
+            900,
+            180);
+
+        if (string.IsNullOrWhiteSpace(rewritten))
+        {
+            return BadRequest("The AI service could not rewrite that CV section right now.");
+        }
+
+        return Ok(new { sectionName, style, targetRole, text = rewritten.Trim() });
+    }
+
     [HttpPost("improve")]
     public async Task<IActionResult> Improve()
     {