fix: add ellipsis for config section titles (#1784) (thanks @robbyczgw-cla)

Fixes #1728

Config section header titles were being truncated without visual
indication. Added standard CSS truncation to BOTH title classes:
- .config-section-hero__title (main section headers)
- .config-section-card__title (card headers)

Properties added:
- white-space: nowrap
- overflow: hidden
- text-overflow: ellipsis

CHANGELOG.md

@@ -29,6 +29,7 @@ Docs: https://docs.clawd.bot
 
 ### Fixes
 - Gateway: include inline config env vars in service install environments. (#1735) Thanks @Seredeep.
+- UI: add ellipsis to config section titles in the Control UI. (#1784) Thanks @robbyczgw-cla.
 - BlueBubbles: route phone-number targets to DMs, avoid leaking routing IDs, and auto-create missing DMs (Private API required). (#1751) Thanks @tyler6204. https://docs.clawd.bot/channels/bluebubbles
 - BlueBubbles: keep part-index GUIDs in reply tags when short IDs are missing.
 - Web UI: hide internal `message_id` hints in chat bubbles.

ui/src/styles/config.css

@@ -413,6 +413,9 @@
   font-size: 16px;
   font-weight: 600;
   letter-spacing: -0.01em;
+  white-space: nowrap;
+  overflow: hidden;
+  text-overflow: ellipsis;
 }
 
 .config-section-hero__desc {
@@ -586,6 +589,9 @@
   font-size: 17px;
   font-weight: 600;
   letter-spacing: -0.01em;
+  white-space: nowrap;
+  overflow: hidden;
+  text-overflow: ellipsis;
 }
 
 .config-section-card__desc {