feat(design): a video's one action list (C1) — the card's "…", the menu holds the rest (E28 S3e1)

- useContextMenu gains buttonProps (a row's visible "…" opens the same menu under the button; a
  second press closes it) and anchor (the element the menu came from, for a panel a row opens).
- ui/MoreButton; ActionMenu rows can run inGesture (a clipboard write inside the click, Safari).
- useVideoActions: one builder for a video's menu (play / restart, channel, watched, save, add to
  playlist, download, details, copy title / link, hide, reset, pin), composed by the feed and by
  Home's rails; the playlists and details panels open anchored beside the card (VideoFollowUp).
- The card keeps watched / save / add to playlist and the "…": on the picture on hover (the
  duration steps aside), in the rows' action column; on touch only a 44px "…" beside the title.
  Download, hide, reset and the hover info card leave the card.
- The title is selectable: a click ending a selection neither plays nor follows the link.
- DESIGN.md: how C1 is built + the log row.

frontend/src/i18n/locales/en/card.json

@@ -22,6 +22,8 @@
   "menu": {
     "label": "Video",
     "unmarkWatched": "Mark unwatched",
-    "unsave": "Remove from saved"
+    "unsave": "Remove from saved",
+    "more": "More actions",
+    "openChannel": "Open the channel"
   }
 }

frontend/src/i18n/locales/en/common.json

@@ -42,5 +42,13 @@
     "movedOver": "“{{title}}” moved to position {{pos}} of {{total}}.",
     "dropped": "“{{title}}” dropped at position {{pos}} of {{total}}.",
     "cancelled": "Move cancelled; “{{title}}” is back at position {{pos}}."
+  },
+  "copy": {
+    "title": "Copy title",
+    "name": "Copy name",
+    "link": "Copy link",
+    "done": "Copied to the clipboard",
+    "linkDone": "Link copied to the clipboard",
+    "failed": "Couldn't copy to the clipboard"
   }
 }

frontend/src/i18n/locales/hu/card.json

@@ -22,6 +22,8 @@
   "menu": {
     "label": "Videó",
     "unmarkWatched": "Megnézés visszavonása",
-    "unsave": "Törlés a mentettek közül"
+    "unsave": "Törlés a mentettek közül",
+    "more": "További műveletek",
+    "openChannel": "Csatorna megnyitása"
   }
 }

frontend/src/i18n/locales/hu/common.json

@@ -42,5 +42,13 @@
     "movedOver": "„{{title}}” a(z) {{pos}}. helyre került a(z) {{total}} közül.",
     "dropped": "„{{title}}” letéve a(z) {{pos}}. helyre a(z) {{total}} közül.",
     "cancelled": "Mozgatás megszakítva; „{{title}}” visszakerült a(z) {{pos}}. helyre."
+  },
+  "copy": {
+    "title": "Cím másolása",
+    "name": "Név másolása",
+    "link": "Link másolása",
+    "done": "Vágólapra másolva",
+    "linkDone": "Link a vágólapra másolva",
+    "failed": "Nem sikerült a vágólapra másolni"
   }
 }