feat(panel): remove full mode, rename compact to standard and fixed some UI (#328)

* feat(panel): remove full mode, rename compact to standard

- Remove panel-full entry (660×340) and all full-mode code paths
- Rename compact → standard across panel, settings, translations
- Restrict tile hover/click to icon+label only (no border hover)
- Shrink close button to 24×24 with 12px glyph
- Reduce standard section vertical padding to 4px
- Standard panel height: 290 → 260 (matches legacy at 260)
- Fix widget/shortcut/service toggle to respect panel-mode setting
- Update README with correct sizes and behavior

* added new thumbnail.webp

---------

Co-authored-by: Ahmed5Emad <ahmed5emad@users.noreply.github.com>

screen-toolkit/translations/en.json

@@ -98,11 +98,10 @@
       "label": "Hide Cursor in Recordings"
     },
     "panel_mode": {
-      "description": "Layout of the main panel. Compact is the dense grid; Full is the original spacious grid.",
+      "description": "Layout of the main panel. Standard is the default dense grid; Legacy recreates the Noctalia-v4 layout.",
       "label": "Panel Mode",
       "options": {
-        "compact": "Compact",
-        "full": "Full",
+        "standard": "Standard",
         "legacy": "Legacy"
       }
     },