Add reminder emails and AI CV improvement tools

JobTrackerApi/Controllers/ProfileCvController.cs

@@ -91,6 +91,34 @@ public sealed class ProfileCvController : ControllerBase
         return Ok(new { imported = true, characters = text.Length });
     }
 
+    [HttpPost("improve")]
+    public async Task<IActionResult> Improve()
+    {
+        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 improving it.");
+
+        var improved = await _aiService.SummarizeSectionAsync(
+            "Rewrite this CV into a cleaner, better-structured master CV profile. Preserve factual claims, employers, skills, and measurable results. Improve clarity, tighten wording, use strong bullet-style phrasing, and keep it ready for further tailoring to specific roles. Return only the improved CV text.",
+            user.ProfileCvText,
+            1800,
+            500);
+
+        if (string.IsNullOrWhiteSpace(improved))
+        {
+            return BadRequest("The AI service could not improve your CV text right now.");
+        }
+
+        user.ProfileCvText = improved.Trim();
+        var result = await _users.UpdateAsync(user);
+        if (!result.Succeeded)
+        {
+            return BadRequest(string.Join("; ", result.Errors.Select(e => e.Description)));
+        }
+
+        return Ok(new { improved = true, characters = user.ProfileCvText.Length, text = user.ProfileCvText });
+    }
+
     private static async Task<string> ExtractTextAsync(IFormFile file, string extension)
     {
         if (string.Equals(extension, ".txt", StringComparison.OrdinalIgnoreCase) || string.Equals(extension, ".md", StringComparison.OrdinalIgnoreCase))