feat: handle unprotected session expiration (#779)

* feat: hide note contents if the protection expires when the protected note is open and wasn't edited for a while

* feat: handle session expiration for opened protected note for both plain advanced editors

* fix: if after canceling  session expiry modal only one unprotected note stays selected, show its contents in the editor

* refactor: handle session expiration for opened protected note (move the logic to web client)

* feat: handle the case of selecting "Don't remember" option in session expiry dialog

* test (WIP): add unit tests for protecting opened note after the session has expired

* test: add remaining unit tests

* refactor: move the opened note protection logic to "editor_view"

* refactor: reviewer comments
- don't rely on user signed-in/out status to require authentication for protected note
- remove unnecessary async/awaits
- better wording on ui

* refactor: reviewer's comments:
 - use snjs method to check if "Don't remember" option is selected in authentication modal
 - move the constant to snjs
 - fix eslint error

* refactor: avoid `any` type for `appEvent` payload

* test: add unit tests

* chore: update function name

* refactor: use simpler protection session event types

* refactor: protected access terminology

* refactor: start counting idle timer after every edit (instead of counting by interval in spite of edits)

* test: unit tests

* style: don't give extra brightness to the "View Note"/"Authenticate" button on hover/focus

* chore: bump snjs version

* chore: put snjs "beta" version

* fix: run protection timeout when the note is marked as protected

* chore: snjs version bump

* refactor: immediately lock the note if it's marked as "Protected"

* refactor: rename component, directive and some props

* refactor: remove extra check

* refactor: rename the method

* chore: update snjs version

Co-authored-by: Mo Bitar <me@bitar.io>

app/assets/javascripts/components/ProtectedNoteOverlay.tsx

@@ -0,0 +1,51 @@
+import { AppState } from '@/ui_models/app_state';
+import { toDirective } from './utils';
+
+type Props = {
+  appState: AppState;
+  onViewNote: () => void;
+  hasProtectionSources: boolean;
+};
+
+function ProtectedNoteOverlay({
+  appState,
+  onViewNote,
+  hasProtectionSources,
+}: Props) {
+  const instructionText = hasProtectionSources
+    ? 'Authenticate to view this note.'
+    : 'Add a passcode or create an account to require authentication to view this note.';
+
+  return (
+    <div className="flex flex-col items-center justify-center text-center max-w-md">
+      <h1 className="text-2xl m-0 w-full">This note is protected</h1>
+      <p className="text-lg mt-2 w-full">{instructionText}</p>
+      <div className="mt-4 flex gap-3">
+        {!hasProtectionSources && (
+          <button
+            className="sn-button small info"
+            onClick={() => {
+              appState.accountMenu.setShow(true);
+            }}
+          >
+            Open account menu
+          </button>
+        )}
+        <button
+          className="sn-button small outlined normal-focus-brightness"
+          onClick={onViewNote}
+        >
+          {hasProtectionSources ? 'Authenticate' : 'View Note'}
+        </button>
+      </div>
+    </div>
+  );
+}
+
+export const ProtectedNoteOverlayDirective = toDirective<Props>(
+  ProtectedNoteOverlay,
+  {
+    onViewNote: '&',
+    hasProtectionSources: '=',
+  }
+);