SEO polish: OG image, favicons, 404, article schema, image optimization

- Add branded 1200x630 og-default.jpg; article pages use their hero as
  og:image, others use the default
- Wire the existing (previously unlinked) favicon set into every page
- Add branded 404.html with root-absolute paths + noindex
- Emit Article + localized BreadcrumbList JSON-LD on all article pages
- Convert 74 heavy served photos to WebP (28MB -> 8.5MB, -70%), rewrite
  references, add loading=lazy/decoding=async to below-fold images and
  fetchpriority=high to heroes (protect LCP)
- Stop tracking images/original/ (458MB of unused source masters; kept on
  disk, gitignored) and ignore .playwright-mcp/

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

si/projects/paint-and-wine-at-sunset/index.html

@@ -16,15 +16,22 @@
     <meta property="og:title" content="Slikanje in vino ob sončnem zahodu, praznovanje dneva žena z umetnostjo in glasbo - MSOS">
     <meta property="og:description" content="Slikanje, vino in glasba so v Gorici združili študente ob praznovanju dneva žena in prvem dogodku MŠOS Nova Gorica.">
     <meta property="og:url" content="https://msosorg.com/si/projects/paint-and-wine-at-sunset/">
-    <meta property="og:image" content="https://msosorg.com/images/paint-wine-1.jpg">
+    <meta property="og:image" content="https://msosorg.com/images/paint-wine-1.webp">
     <meta property="og:locale" content="sl_SI">
     <meta property="og:locale:alternate" content="en_GB">
     <meta property="og:locale:alternate" content="mk_MK">
     <meta name="twitter:card" content="summary_large_image">
     <meta name="twitter:title" content="Slikanje in vino ob sončnem zahodu, praznovanje dneva žena z umetnostjo in glasbo - MSOS">
     <meta name="twitter:description" content="Slikanje, vino in glasba so v Gorici združili študente ob praznovanju dneva žena in prvem dogodku MŠOS Nova Gorica.">
-    <meta name="twitter:image" content="https://msosorg.com/images/paint-wine-1.jpg">
+    <meta name="twitter:image" content="https://msosorg.com/images/paint-wine-1.webp">
     <script type="application/ld+json">{"@context":"https://schema.org","@type":"Organization","name":"Makedonska študentska organizacija v Sloveniji","alternateName":"MSOS","url":"https://msosorg.com/si/","logo":"https://msosorg.com/images/1-logo.png","email":"info@msosorg.com","address":{"@type":"PostalAddress","streetAddress":"Masarykova cesta 24","postalCode":"1000","addressLocality":"Ljubljana","addressCountry":"SI"},"sameAs":["https://www.facebook.com/msos.org","https://www.instagram.com/msosorg_com","https://www.linkedin.com/company/msos-org","https://www.youtube.com/@msosorg"]}</script>
+    <script type="application/ld+json">{"@context":"https://schema.org","@type":"Article","headline":"Slikanje in vino ob sončnem zahodu, praznovanje dneva žena z umetnostjo in glasbo","description":"Slikanje, vino in glasba so v Gorici združili študente ob praznovanju dneva žena in prvem dogodku MŠOS Nova Gorica.","image":"https://msosorg.com/images/paint-wine-1.webp","inLanguage":"sl","author":{"@type":"Organization","name":"Makedonska študentska organizacija v Sloveniji","url":"https://msosorg.com/si/"},"publisher":{"@type":"Organization","name":"Makedonska študentska organizacija v Sloveniji","logo":{"@type":"ImageObject","url":"https://msosorg.com/images/1-logo.png"}},"mainEntityOfPage":"https://msosorg.com/si/projects/paint-and-wine-at-sunset/"}</script>
+    <script type="application/ld+json">{"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Domov","item":"https://msosorg.com/si/"},{"@type":"ListItem","position":2,"name":"Dogodki in projekti","item":"https://msosorg.com/si/projects/"},{"@type":"ListItem","position":3,"name":"Slikanje in vino ob sončnem zahodu, praznovanje dneva žena z umetnostjo in glasbo","item":"https://msosorg.com/si/projects/paint-and-wine-at-sunset/"}]}</script>
+    <link rel="icon" type="image/png" href="/favicon-96x96.png" sizes="96x96">
+    <link rel="icon" type="image/svg+xml" href="/favicon.svg">
+    <link rel="shortcut icon" href="/favicon.ico">
+    <link rel="apple-touch-icon" sizes="180x180" href="/apple-touch-icon.png">
+    <link rel="manifest" href="/site.webmanifest">
     <!-- SEO:END -->
     <!-- Google Fonts -->
     <link rel="preconnect" href="https://fonts.googleapis.com">
@@ -173,14 +180,14 @@
             </header>
 
             <figure class="article-main-image">
-                <img src="../../../images/paint-wine-1.jpg" alt="Dogodek Slikanje in vino ob sončnem zahodu v Gorici">
+                <img fetchpriority="high" src="../../../images/paint-wine-1.webp" alt="Dogodek Slikanje in vino ob sončnem zahodu v Gorici">
             </figure>
 
             <div class="article-body">
                 <p>Na mednarodni dan žena je ekipa MŠOS Nova Gorica pripravila svoj prvi lokalni dogodek v sodelovanju z Makedonskim kulturnim društvom »Ohridski Biseri«. Študenti iz Ljubljane, Nove Gorice in okolice so prestopili mejo v italijansko Gorico na večer slikanja, vina in glasbe.</p>
 
                 <figure class="article-inline-image">
-                    <img src="../../../images/paint-wine-2.png" alt="Študenti slikajo na večeru slikanja in vina">
+                    <img loading="lazy" decoding="async" src="../../../images/paint-wine-2.webp" alt="Študenti slikajo na večeru slikanja in vina">
                 </figure>
 
                 <h2>Prvič za MŠOS Nova Gorica</h2>
@@ -188,7 +195,7 @@
                 <p>To je bilo več kot le dogodek. Bila je prva uradna dejavnost, ki jo je organizirala naša nova ekipa MŠOS Nova Gorica. S podporo Makedonskega kulturnega društva »Ohridski Biseri« smo prijeten prostor Etnoteca Mama Angela spremenili v prostor, poln ustvarjalnosti in smeha.</p>
 
                 <figure class="article-inline-image">
-                    <img src="../../../images/paint-wine-3.jpg" alt="Prijeten prostor Etnoteca Mama Angela">
+                    <img loading="lazy" decoding="async" src="../../../images/paint-wine-3.webp" alt="Prijeten prostor Etnoteca Mama Angela">
                 </figure>
 
                 <h2>Umetnost, glasba in druženje</h2>
@@ -198,11 +205,11 @@
                 <p>DJ v živo je večeru dal živahen ritem in ga spremenil v več kot le delavnico. Postal je praznovanje. Med potezami čopiča in ritmi so se študenti povezovali, delili zgodbe in uživali v vzdušju, ki je bilo hkrati ustvarjalno in praznično.</p>
 
                 <figure class="article-inline-image">
-                    <img src="../../../images/paint-wine-4.png" alt="Platna, ki se polnijo z barvami, medtem ko študenti slikajo">
+                    <img loading="lazy" decoding="async" src="../../../images/paint-wine-4.webp" alt="Platna, ki se polnijo z barvami, medtem ko študenti slikajo">
                 </figure>
 
                 <figure class="article-inline-image">
-                    <img src="../../../images/paint-wine-5.png" alt="Študenti skupaj uživajo ob vinu in glasbi">
+                    <img loading="lazy" decoding="async" src="../../../images/paint-wine-5.webp" alt="Študenti skupaj uživajo ob vinu in glasbi">
                 </figure>
 
                 <h2>Zakaj je bilo pomembno</h2>
@@ -216,11 +223,11 @@
                 </div>
 
                 <figure class="article-inline-image">
-                    <img src="../../../images/paint-wine-6.png" alt="Končane slike na ogled">
+                    <img loading="lazy" decoding="async" src="../../../images/paint-wine-6.webp" alt="Končane slike na ogled">
                 </figure>
 
                 <figure class="article-inline-image">
-                    <img src="../../../images/paint-wine-7.png" alt="Skupina uživa v praznovanju">
+                    <img loading="lazy" decoding="async" src="../../../images/paint-wine-7.webp" alt="Skupina uživa v praznovanju">
                 </figure>
 
                 <h2>Pogled naprej</h2>
@@ -228,11 +235,11 @@
                 <p>Večer slikanja in vina je pokazal, da je MŠOS Nova Gorica pripravljena prinesti sveže ideje in energijo v našo študentsko družino. Od trkanja kozarcev vina do platen, ki se polnijo z barvami, je večer vsem pustil spomine in nekaj s slikanjem obarvanih prstov, ki jih ne bomo pozabili.</p>
 
                 <figure class="article-inline-image">
-                    <img src="../../../images/paint-wine-8.png" alt="Spomin z večera slikanja in vina">
+                    <img loading="lazy" decoding="async" src="../../../images/paint-wine-8.webp" alt="Spomin z večera slikanja in vina">
                 </figure>
 
                 <figure class="article-inline-image">
-                    <img src="../../../images/paint-wine-9.jpg" alt="Skupnost MŠOS Nova Gorica ob sončnem zahodu">
+                    <img loading="lazy" decoding="async" src="../../../images/paint-wine-9.webp" alt="Skupnost MŠOS Nova Gorica ob sončnem zahodu">
                 </figure>
             </div>
         </article>
@@ -259,7 +266,7 @@
         <div class="footer-main">
             <div class="footer-info">
                 <div class="footer-logo">
-                    <img src="../../../images/13-whitelogo.png" alt="Logotip Makedonske študentske organizacije v Sloveniji">
+                    <img loading="lazy" decoding="async" src="../../../images/13-whitelogo.png" alt="Logotip Makedonske študentske organizacije v Sloveniji">
                 </div>
                 <p class="footer-legal-name">Društvo Makedonska Študentska Organizacija v Sloveniji za študentsko podporo in kulturno sodelovanje</p>
                 <p>