feat: DB-backed localized templates + language-aware emails

- New Apis/myai-models project: MyAiDbContext (schema myAi), TemplateEntity,
  ITemplateService, DbTemplateService with 10-min in-memory cache
- Seeds EN+RO variants for all user-facing templates (match email, job search
  results email, HTML status pages, AI system prompt)
- Match result email now sent in user's UI language (en/ro)
- Job search results email now respects session language
- Language propagates: MatchJobRequest -> token -> session -> email
- Add Language column to JobSearchTokens and JobSearchSessions (default 'en')
- All three Dockerfiles updated to include myai-models in build context

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Apis/api/Controllers/CvMatcherController.cs

@@ -10,6 +10,7 @@ using Microsoft.AspNetCore.RateLimiting;
 using Microsoft.Extensions.Options;
 using Swashbuckle.AspNetCore.Annotations;
 using Shared.Models.Responses;
+using MyAi.Models.Services;
 
 namespace Api.Controllers;
 
@@ -27,6 +28,7 @@ public sealed class CvMatcherController : ControllerBase
     private readonly FileStorageSettings _fileStorageSettings;
     private readonly JobSearchLinkSettings _jobSearchLinkSettings;
     private readonly IEmailSender _emailSender;
+    private readonly ITemplateService _templates;
     private readonly ILogger<CvMatcherController> _logger;
 
     public CvMatcherController(
@@ -36,6 +38,7 @@ public sealed class CvMatcherController : ControllerBase
         IOptions<FileStorageSettings> fileStorageSettings,
         IOptions<JobSearchLinkSettings> jobSearchLinkSettings,
         IEmailSender emailSender,
+        ITemplateService templates,
         ILogger<CvMatcherController> logger)
     {
         _cvApi = cvApi;
@@ -44,6 +47,7 @@ public sealed class CvMatcherController : ControllerBase
         _fileStorageSettings = fileStorageSettings.Value;
         _jobSearchLinkSettings = jobSearchLinkSettings.Value;
         _emailSender = emailSender;
+        _templates = templates;
         _logger = logger;
     }
 
@@ -160,13 +164,15 @@ public sealed class CvMatcherController : ControllerBase
                 ? request.JobUrl
                 : "Manual job description";
 
+            var language = NormalizeLanguage(request.Language);
+
             string? jobSearchLink = null;
             if (!string.IsNullOrWhiteSpace(request.Email) && !string.IsNullOrWhiteSpace(request.CvDocumentId))
             {
                 try
                 {
                     var tokenResp = await _jobSearchApi.CreateTokenAsync(
-                        new CreateJobSearchTokenRequest { CvDocumentId = request.CvDocumentId, Email = request.Email },
+                        new CreateJobSearchTokenRequest { CvDocumentId = request.CvDocumentId, Email = request.Email, Language = language },
                         ct);
                     var baseUrl = _jobSearchLinkSettings.BaseUrl.TrimEnd('/');
                     jobSearchLink = $"{baseUrl}/api/cv-matcher/job-search/start?t={tokenResp.TokenId}";
@@ -179,8 +185,8 @@ public sealed class CvMatcherController : ControllerBase
 
             await _emailSender.SendMatchAsync(
                 request.Email,
-                SmtpEmailSender.BuildMatchEmailSubject(res.Score, jobLabel),
-                SmtpEmailSender.BuildMatchEmailBody(request.CvDocumentId ?? "N/A", res, jobLabel, jobSearchLink),
+                _emailSender.BuildMatchEmailSubject(res.Score, jobLabel, language),
+                _emailSender.BuildMatchEmailBody(request.CvDocumentId ?? "N/A", res, jobLabel, language, jobSearchLink),
                 attachmentPath,
                 ct);
 
@@ -217,23 +223,24 @@ public sealed class CvMatcherController : ControllerBase
         try
         {
             var result = await _jobSearchApi.StartSearchAsync(t, ct);
+            var lang = "en";
             var html = result.Status switch
             {
                 StartJobSearchStatus.Started =>
-                    HtmlPage("Job search started", "Your job search has started. Results will be sent to your email shortly."),
+                    HtmlPage(_templates.Get("html.job-search.started.title", lang), _templates.Get("html.job-search.started.message", lang)),
                 StartJobSearchStatus.AlreadyUsed =>
-                    HtmlPage("Link already used", "This job search link has already been used."),
+                    HtmlPage(_templates.Get("html.job-search.already-used.title", lang), _templates.Get("html.job-search.already-used.message", lang)),
                 StartJobSearchStatus.Expired =>
-                    HtmlPage("Link expired", "This job search link has expired. Please request a new CV match to get a fresh link."),
+                    HtmlPage(_templates.Get("html.job-search.expired.title", lang), _templates.Get("html.job-search.expired.message", lang)),
                 _ =>
-                    HtmlPage("Invalid link", "This job search link is not valid.")
+                    HtmlPage(_templates.Get("html.job-search.invalid.title", lang), _templates.Get("html.job-search.invalid.message", lang))
             };
             return Content(html, "text/html");
         }
         catch (Exception ex)
         {
             _logger.LogError(ex, "Job search start failed for token {Token}.", t);
-            return Content(HtmlPage("Error", "An error occurred. Please try again later."), "text/html");
+            return Content(HtmlPage(_templates.Get("html.job-search.error.title", "en"), _templates.Get("html.job-search.error.message", "en")), "text/html");
         }
     }
 
@@ -288,6 +295,9 @@ public sealed class CvMatcherController : ControllerBase
         return Path.Combine(GetFileStoragePath(), $"{safeId}.pdf");
     }
 
+    private static string NormalizeLanguage(string? language) =>
+        string.IsNullOrWhiteSpace(language) ? "en" : language.ToLowerInvariant().Split('-')[0].Trim();
+
     private string GetFileStoragePath()
     {
         var fileStoragePath = _fileStorageSettings.Path;