feat(core,app,android,ios,cli): look up new titles after every crawl, show presses and work on iOS

Metadata was only fetched after adding a share (mobile) or from the
Settings buttons (desktop), so a show or episode that turned up in an
existing share stayed bare. Every crawl is now followed by a match run
when enrichment is on; `plan` makes no requests for a library that is
already matched. A stored episode guide is fetched again when a file
newer than it has no named entry, and daily for two weeks while an
aired episode is still unnamed.

Removing a share now carries its watch state to any other share holding
the same file, `pstr remove` drops the share's catalog rows, and the app
forgets catalog rows of shares no longer configured — an older `pstr
remove` left them, and every episode showed twice.

iOS, for a slow iPad:
- swipe back on a settings page uses its own edge strip; on the whole
  page it also pressed the row under the finger and opened the metadata
  sheet
- "Change match" from the tile menu opens once the menu has dismissed,
  not after a guessed 350 ms that a slow device missed
- the activity banner tracks each running line by itself (also Android),
  so overlapping work no longer leaves it spinning forever
- buttons, tiles and rows draw their press; marking watched shows at
  once; remove/repair share, sign out and deletions show the banner;
  the player says "Opening…" while the stream opens
- posters are read into a reserved buffer instead of a byte at a time

ios/ProtonStream/App/ProtonStreamApp.swift

@@ -262,7 +262,7 @@ private struct NavigationBar: View {
                     .padding(.bottom, 6)
                     .contentShape(Rectangle())
                 }
-                .buttonStyle(.plain)
+                .buttonStyle(.pressable)
                 .accessibilityLabel(item.label)
                 .accessibilityAddTraits(selected ? .isSelected : [])
             }
@@ -295,7 +295,7 @@ private struct NavigationRail: View {
                     .frame(width: 80)
                     .contentShape(Rectangle())
                 }
-                .buttonStyle(.plain)
+                .buttonStyle(.pressable)
                 .accessibilityLabel(item.label)
                 .accessibilityAddTraits(selected ? .isSelected : [])
             }
@@ -350,7 +350,7 @@ private struct Snackbar: View {
                     Button("Undo", action: model.performUndo)
                         .textStyle(.labelLarge)
                         .foregroundStyle(scheme.inversePrimary)
-                        .buttonStyle(.plain)
+                        .buttonStyle(.pressable)
                         .padding(.horizontal, 8)
                 }
             }