convert card template error to tuple, and report notetype name in error

Older translations will note have the $notetype variable, but that is
not an error in Fluent - it would only cause problems if we tried to
use the new string on older Anki versions.

ftl/core/card-templates.ftl

@@ -18,7 +18,7 @@ card-templates-night-mode = Night Mode
 # on a mobile device.
 card-templates-add-mobile-class = Add Mobile Class
 card-templates-preview-settings = Options
-card-templates-invalid-template-number = Card template { $number } has a problem.
+card-templates-invalid-template-number = Card template { $number } in notetype '{ $notetype }' has a problem.
 card-templates-changes-saved = Changes saved.
 card-templates-discard-changes = Discard changes?
 card-templates-add-card-type = Add Card Type...

rslib/src/error/mod.rs

@@ -21,7 +21,7 @@ pub type Result<T, E = AnkiError> = std::result::Result<T, E>;
 pub enum AnkiError {
     InvalidInput(String),
     TemplateError(String),
-    TemplateSaveError { ordinal: usize },
+    TemplateSaveError(TemplateSaveError),
     IoError(String),
     DbError(DbError),
     NetworkError(NetworkError),
@@ -60,8 +60,8 @@ impl AnkiError {
                 // already localized
                 info.into()
             }
-            AnkiError::TemplateSaveError { ordinal } => tr
-                .card_templates_invalid_template_number(ordinal + 1)
+            AnkiError::TemplateSaveError(err) => tr
+                .card_templates_invalid_template_number(err.ordinal + 1, &err.notetype)
                 .into(),
             AnkiError::DbError(err) => err.localized_description(tr),
             AnkiError::SearchError(kind) => kind.localized_description(&tr),
@@ -129,3 +129,9 @@ impl From<regex::Error> for AnkiError {
         AnkiError::InvalidRegex(err.to_string())
     }
 }
+
+#[derive(Debug, PartialEq)]
+pub struct TemplateSaveError {
+    pub notetype: String,
+    pub ordinal: usize,
+}

rslib/src/notetype/mod.rs

@@ -26,7 +26,7 @@ use crate::{
     collection::Collection,
     decks::DeckId,
     define_newtype,
-    error::{AnkiError, Result},
+    error::{AnkiError, Result, TemplateSaveError},
     notes::Note,
     prelude::*,
     template::{FieldRequirements, ParsedTemplate},
@@ -250,7 +250,10 @@ impl Notetype {
                 }
             });
         if let Some(idx) = invalid_card_idx {
-            return Err(AnkiError::TemplateSaveError { ordinal: idx });
+            return Err(AnkiError::TemplateSaveError(TemplateSaveError {
+                notetype: self.name.clone(),
+                ordinal: idx,
+            }));
         }
         let reqs = self.updated_requirements(&parsed_templates);