fix: share, upload, crop, auto-skip, tag chips and See all hold what they claim

- Share: a link that expired is never copied (the dialog and one-click Share pick a live one,
  else make one), says it expired, and the copy-on-open claim clears on the next copy.
- A password-protected file link asks to open a file, not to watch a video.
- Upload: Cancel, the close button or the backdrop while naming a folder makes no folder; a failed
  refetch keeps the target; a folder being made says so.
- Crop: an infinite number is dropped, not a 500; an unprobed clip's size follows a shown-size crop;
  the edit_spec docs name frame_w/frame_h; the join and rotated paths are tested.
- Auto-skip: the wait gives way on a marker too short for it, so the skip still fires.
- Tag chips count the followed channels (subscribed_count) and a toggled chip keeps the focus.
- Continue watching's See all sorts by last watched when in progress was already on.

frontend/src/watch/watchStrings.ts

@@ -27,6 +27,8 @@ const STR = {
     crashHint: "Reload the page to try again.",
     reload: "Reload",
     passwordTitleFolder: "This folder is password-protected",
+    passwordTitleFile: "This file is password-protected",
+    open: "Open",
     folderEmpty: "This folder is empty.",
     play: "Play",
     files: (n: number) => (n === 1 ? "1 file" : `${n} files`),
@@ -55,6 +57,8 @@ const STR = {
     crashHint: "Töltsd újra az oldalt, és próbáld újra.",
     reload: "Újratöltés",
     passwordTitleFolder: "Ez a mappa jelszóval védett",
+    passwordTitleFile: "Ez a fájl jelszóval védett",
+    open: "Megnyitás",
     folderEmpty: "Ez a mappa üres.",
     play: "Lejátszás",
     files: (n: number) => `${n} fájl`,
@@ -83,6 +87,8 @@ const STR = {
     crashHint: "Lade die Seite neu und versuche es erneut.",
     reload: "Neu laden",
     passwordTitleFolder: "Dieser Ordner ist passwortgeschützt",
+    passwordTitleFile: "Diese Datei ist passwortgeschützt",
+    open: "Öffnen",
     folderEmpty: "Dieser Ordner ist leer.",
     play: "Abspielen",
     files: (n: number) => (n === 1 ? "1 Datei" : `${n} Dateien`),