Fix View Repo outline, social-share icon stroke, and owner avatar sizing

- .project-github-button renamed to .project-repo-button (added 1px border
  for proper outline style; the old class is gone so the button was rendering
  as unstyled <a>).
- Suppress inherited stroke on the Tabler SVG <rect> viewport marker — without
  this it draws a square outline inside the round social-share button.
- Move owner avatar inline styles into CSS with object-fit: cover, explicit
  width/height, and border-radius: 50%; add flex shrink/grow rules for the
  owner row's three spans so the avatar isn't squashed by the flex layout.

assets/css/style.css

@@ -21,6 +21,7 @@
     border-radius: 50%;
     text-decoration: none;
     transition: background-color 0.3s;
+    overflow: hidden;
 }
 
 .project-social-sharing a:hover {
@@ -35,6 +36,14 @@
     transition: stroke 0.3s;
 }
 
+/* Tabler-style icons include a viewport <rect> with no fill; without
+   `stroke="none"` it inherits the parent's stroke color and renders as
+   a square outline inside the round button. Suppress that stroke on
+   the rect alone. */
+.project-social-sharing svg rect {
+    stroke: none;
+}
+
 .project-social-sharing a:hover svg {
     stroke: #ffffff;
 }
@@ -82,16 +91,26 @@
 
 .project-owner img {
     display: block;
-    margin: 0 auto 0;
-    max-width: 50px;
+    margin: 0;
+    width: 50px;
+    height: 50px;
+    border-radius: 50%;
+    object-fit: cover;
+    flex-shrink: 0;
 }
 
-.project-owner span:last-of-type {
-    display: flex;
-    justify-content: space-between;
-    flex-direction: column;
-    flex: 1;
-    align-items: end;
+.project-owner-avatar {
+    flex: 0 0 auto;
+    display: block;
+}
+
+.project-owner-name {
+    flex: 1 1 auto;
+    min-width: 0;
+}
+
+.project-owner-follow {
+    flex: 0 0 auto;
 }
 
 .project-meta-table th {
@@ -119,7 +138,7 @@
     color: #FFF;
 }
 
-.project-buttons a.button.project-github-button {
+.project-buttons a.button.project-repo-button {
     display: block;
     background-color: #e0e0e0;
     color: #333;
@@ -128,9 +147,10 @@
     margin: 12px 0;
     border-radius: 4px;
     text-decoration: none;
+    border: 1px solid #c9c9c9;
 }
 
-.project-buttons a.button.project-github-button:hover {
+.project-buttons a.button.project-repo-button:hover {
     background-color: #c9c9c9;
     color: #333;
 }