feat: handle unprotected session expiration (#747)

* 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

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

app/assets/javascripts/views/application/application_view.ts

@@ -19,9 +19,9 @@ class ApplicationViewCtrl extends PureViewCtrl<unknown, {
   needsUnlock?: boolean,
   appClass: string,
 }> {
-  public platformString: string
-  private notesCollapsed = false
-  private tagsCollapsed = false
+  public platformString: string;
+  private notesCollapsed = false;
+  private tagsCollapsed = false;
   /**
    * To prevent stale state reads (setState is async),
    * challenges is a mutable array
@@ -108,14 +108,17 @@ class ApplicationViewCtrl extends PureViewCtrl<unknown, {
   /** @override */
   async onAppEvent(eventName: ApplicationEvent) {
     super.onAppEvent(eventName);
-    if (eventName === ApplicationEvent.LocalDatabaseReadError) {
-      alertDialog({
-        text: 'Unable to load local database. Please restart the app and try again.'
-      });
-    } else if (eventName === ApplicationEvent.LocalDatabaseWriteError) {
-      alertDialog({
-        text: 'Unable to write to local database. Please restart the app and try again.'
-      });
+    switch (eventName) {
+      case ApplicationEvent.LocalDatabaseReadError:
+        alertDialog({
+          text: 'Unable to load local database. Please restart the app and try again.'
+        });
+        break;
+      case ApplicationEvent.LocalDatabaseWriteError:
+        alertDialog({
+          text: 'Unable to write to local database. Please restart the app and try again.'
+        });
+        break;
     }
   }