Action view mobile improvements and fixes (#30309)

Fix the action issue in https://github.com/go-gitea/gitea/issues/30303,
specifically:

- Use opaque step header hover background to avoid transparency issue
- Un-sticky the `action-view-left` on mobile, it would otherwise overlap
into right view
- Improve commit summary, let it wrap
- Fix and comment z-indexes
- Tweak width for run-list-item-right so it wastes less space on desktop
- Synced latest changes to console colors from dark to light theme

<img width="467" alt="Screenshot 2024-04-06 at 18 58 15"
src="https://github.com/go-gitea/gitea/assets/115237/8ad26b72-6cd9-4522-8ad1-6fd86b2d0d53">

web_src/css/actions.css

@@ -44,7 +44,7 @@
 }
 
 .run-list-item-right {
-  flex: 0 0 15%;
+  flex: 0 0 min(20%, 130px);
   display: flex;
   flex-direction: column;
   gap: 3px;

web_src/css/themes/theme-gitea-dark.css

@@ -65,7 +65,7 @@
   --color-console-fg-subtle: #bec4c8;
   --color-console-bg: #171b1e;
   --color-console-border: #2e353b;
-  --color-console-hover-bg: #e8e8ff16;
+  --color-console-hover-bg: #292d31;
   --color-console-active-bg: #2e353b;
   --color-console-menu-bg: #252b30;
   --color-console-menu-border: #424b51;

web_src/css/themes/theme-gitea-light.css

@@ -63,12 +63,12 @@
   /* console colors - used for actions console and console files */
   --color-console-fg: #f8f8f9;
   --color-console-fg-subtle: #bec4c8;
-  --color-console-bg: #181b1d;
-  --color-console-border: #313538;
-  --color-console-hover-bg: #ffffff16;
-  --color-console-active-bg: #313538;
-  --color-console-menu-bg: #272b2e;
-  --color-console-menu-border: #464a4d;
+  --color-console-bg: #171b1e;
+  --color-console-border: #2e353b;
+  --color-console-hover-bg: #292d31;
+  --color-console-active-bg: #2e353b;
+  --color-console-menu-bg: #252b30;
+  --color-console-menu-border: #424b51;
   /* named colors */
   --color-red: #db2828;
   --color-orange: #f2711c;