Fix: Implement manual hreflang, redirects, and link corrections

This commit includes multiple fixes to address SEO issues from Google Search Console.

1.  **Standardized Canonical URLs:**
    - Removed explicit `canonical_url` from Portuguese post front matter.
    - `jekyll-seo-tag` now handles canonicals, and the theme's duplicate canonical generation in `_includes/head.html` has been removed.

2.  **Manual `hreflang` Tag Implementation:**
    - Due to `jekyll-seo-tag` not generating `hreflang` tags (likely because `page.polyglot.translations` was empty in its context), `hreflang` tags are now manually generated in `_includes/head.html`.
    - This implementation uses Polyglot's `translate_url` and Jekyll's `absolute_url` filters to construct the correct absolute URLs for each language version, including `x-default`.

3.  **Corrected Internal Links & 404 Redirects:**
    - **Post URLs:**
        - Corrected internal Markdown links in `_posts/` that used incorrect language suffixes (e.g., `post-slug-en`).
        - Added `redirect_from` entries to relevant posts to create 301 redirects from old malformed URLs (e.g., `/posts/slug-en/`, `/pt-BR/posts/slug-pt-BR/`, `/posts/portuguese-slug/`) to their correct canonical URLs.
    - **Tag/Category URLs:**
        - Created manual HTML redirect files (e.g., `tags/automação/index.html`) for Portuguese tag/category pages that were being accessed without the `/pt-BR/` prefix. These now redirect to the correct prefixed URLs.

4.  **Plugin Configuration:**
    - Ensured `jekyll-polyglot` is listed before `jekyll-seo-tag` in `_config.yml`'s plugin list.

**Summary of Changes to Files:**
- `_config.yml`: Plugin order adjusted.
- `_includes/head.html`: Duplicate canonical logic removed, manual `hreflang` logic added.
- `_posts/**/**.md`: Front matter updated with `redirect_from` entries; internal and commented links corrected.
- `tags/*/index.html` & `categories/*/index.html`: New HTML redirect files created for specific paths.

These changes aim to resolve the reported 404 errors, "Alternate page with proper canonical tag" issues, and "Duplicate, Google chose different canonical than user" messages by ensuring correct canonicals, comprehensive hreflang tags, and proper redirects for old/malformed URLs. Sitemap validation is the main remaining step that was not completed.

Author: google-labs-jules[bot]

_includes/head.html

@@ -54,11 +54,16 @@
 
   {{ seo_tags }}
 
-  {% if page.canonical_url %}
-    <link rel="canonical" href="{{ page.canonical_url }}">
-  {% else %}
-    <link rel="canonical" href="{{ page.url | absolute_url }}">
-  {% endif %}
+  <!-- Manual Hreflang Tags -->
+  {%- for lang_code in site.languages -%}
+    {%- assign translated_url = page.url | abs_translate_url: lang_code -%}
+    <link rel="alternate" hreflang="{{ lang_code }}" href="{{ translated_url }}" />
+  {%- endfor -%}
+  {%- if site.default_lang -%}
+    {%- assign x_default_url = page.url | abs_translate_url: site.default_lang -%}
+    <link rel="alternate" hreflang="x-default" href="{{ x_default_url }}" />
+  {%- endif -%}
+  <!-- End Manual Hreflang Tags -->
 
   <title>
     {%- unless page.layout == 'home' -%}

_posts/en/2024-09-15-creating-your-own-custom-lld-in-zabbix.md

@@ -8,6 +8,7 @@ description: "A complete guide to creating a custom Low-Level Discovery in Zabbi
 lang: en
 image: assets/img/zabbix-custom-lld/capa.png  # Removido campo duplicado
 layout: post
+redirect_from: /posts/creating-your-own-custom-lld-in-zabbix-en/
 ---
 
 <!-- *Leia em [Português](https://blog.lmeier.net/pt-BR/posts/criando-seu-proprio-lld-personalizado-no-zabbix/)* -->

_posts/en/2025-02-04-authentication-backstage-entra-id.md

@@ -8,6 +8,7 @@ categories: [Backstage, DevOps, Cloud]
 tags: ["Microsoft Entra ID", Authentication, "Identity Provider", Backstage]
 lang: en
 image: assets/img/backstage-entraid/capa.png
+redirect_from: /posts/authentication-backstage-entra-id-en/
 ---
 
 <!-- [Leia em Português](https://blog.lmeier.net/pt-BR/posts/autenticacao-backstage-entra-id/) -->

_posts/en/2025-03-05-integrating-backstage-azure-devops.md

@@ -8,6 +8,7 @@ categories: [Backstage, DevOps, Cloud]
 tags: ["Azure DevOps", Backstage, "CI/CD Pipelines", Automation]
 lang: en
 image: assets/img/backstage-azure-devops/cover.png
+redirect_from: /posts/integrating-backstage-azure-devops-en/
 ---
 
 <!-- [Leia em Português](https://blog.lmeier.net/pt-BR/posts/integrando-backstage-azure-devops/) -->

_posts/pt-BR/2024-09-15-creating-your-own-custom-lld-in-zabbix.md

@@ -8,6 +8,9 @@ description: "Um guia completo para criar um Low-Level Discovery customizado no
 lang: pt-BR
 image: assets/img/zabbix-custom-lld/capa.png  # Removido campo duplicado
 layout: post
+redirect_from:
+  - /pt-BR/posts/criando-seu-proprio-lld-personalizado-no-zabbix-pt-BR/
+  - /posts/criando-seu-proprio-lld-personalizado-no-zabbix-pt-BR/
 ---
 
 <!-- *Read in [English](https://blog.lmeier.net/posts/creating-your-own-custom-lld-in-zabbix/)* -->

_posts/pt-BR/2024-10-07-monitoring-cluster-shared-volumes-with-zabbix.md

@@ -8,6 +8,9 @@ description: "Como monitorar os discos do seu cluster no Zabbix"
 lang: pt-BR
 layout: post
 image: assets/img/monitor-csv/cover.png
+redirect_from:
+  - /pt-BR/posts/monitorando-cluster-shared-volumes-com-zabbix/
+  - /posts/monitorando-cluster-shared-volumes-com-zabbix/
 ---
 
 <!-- *Also available in [english](https://blog.lmeier.net/posts/monitoring-cluster-shared-volumes-with-zabbix/)* -->

_posts/pt-BR/2024-10-18-how-i-recovered-a-bricked-cctv-camera.md

@@ -8,6 +8,9 @@ categories: [CCTV, Hardware]
 tags: [CCTV, Hardware, Intelbras]
 lang: pt-BR
 image: assets/img/bricked-camera/cover.png
+redirect_from:
+  - /pt-BR/posts/como-recuperei-uma-camera-cftv-brickada/
+  - /posts/como-recuperei-uma-camera-cftv-brickada/
 ---
 
 <!-- *Read in [english](https://blog.lmeier.net/posts/how-i-recovered-a-bricked-cctv-camera/)* -->

_posts/pt-BR/2024-10-22-fortinet-vs--palo-alto--automating-load-balancing.md

@@ -8,6 +8,9 @@ categories: [Zabbix, Monitoring, Python, API, NGFW, "Palo Alto"]
 tags: [Zabbix, Monitoring, Python, API, NGFW, "Palo Alto"]
 lang: pt-BR
 image: assets/img/lb-fortinet-paloalto/cover.png
+redirect_from:
+  - /pt-BR/posts/fortinet-vs-palo-alto-automatizando-balanceamento-de-carga/
+  - /posts/fortinet-vs-palo-alto-automatizando-balanceamento-de-carga/
 ---
 
 <!-- [*Read in english*](https://blog.lmeier.net/posts/fortinet-vs-palo-alto-automating-load-balancing/) -->

_posts/pt-BR/2024-12-19-monitoring-palo-alto-firewalls-using-api.md

@@ -8,6 +8,7 @@ categories: [Zabbix, Monitoring, Python, API, NGFW, Palo Alto]
 tags: [Zabbix, Monitoring, Python, API, NGFW, Palo Alto]
 lang: pt-BR
 image: assets/img/monitoring-using-api/cover.png
+redirect_from: /pt-BR/posts/usando-api-para-monitorar-ipsec-da-palo-alto/
 ---
 
 <!-- *Also available in* [*English*](https://blog.lmeier.net/posts/monitoring-palo-alto-firewalls-using-api/) -->

_posts/pt-BR/2025-02-04-authentication-backstage-entra-id.md

@@ -8,6 +8,7 @@ categories: [Backstage, DevOps, Cloud]
 tags: ["Microsoft Entra ID", Authentication, "Identity Provider", Backstage]
 lang: pt-BR
 image: assets/img/backstage-entraid/capa.png
+redirect_from: /pt-BR/posts/autenticacao-backstage-entra-id-pt-BR/
 ---
 
 <!-- [Read in English](https://blog.lmeier.net/posts/authentication-backstage-entra-id/) -->