Add ESLint rule to enforce Lingui msg usage (#9789)

* Add ESLint rule to enforce Lingui msg usage

Adds a custom ESLint rule 'lingui-msg-rule' that ensures the Lingui _()
function is called with msg`` template literals or plural/select macros,
preventing accidental misuse like _('string') which bypasses i18n.

https://claude.ai/code/session_01JMXXPUgAHiSBGmfGwUojKy

* Support msg({...}) descriptor form and add auto-fix

- Allow msg() function call form: _(msg({message: 'Hello'}))
- Add auto-fix for string literals: _('Bad') -> _(msg`Bad`)
- Add auto-fix for untagged templates: _(`Bad`) -> _(msg`Bad`)
- No auto-fix for variables/function calls (not safely fixable)

https://claude.ai/code/session_01JMXXPUgAHiSBGmfGwUojKy

* fix complex cases

* run autofix HELL YEAH

---------

Co-authored-by: Claude <noreply@anthropic.com>

src/components/Post/Embed/VideoEmbed/VideoEmbedInner/web-controls/VideoControls.tsx

@@ -312,13 +312,13 @@ export function Controls({
         onPointerEnter={onPointerMoveEmptySpace}
         onPointerMove={onPointerMoveEmptySpace}
         onPointerLeave={onPointerLeaveEmptySpace}
-        accessibilityLabel={_(
+        accessibilityLabel={
           !focused
-            ? msg`Unmute video`
+            ? _(msg`Unmute video`)
             : playing
-              ? msg`Pause video`
-              : msg`Play video`,
-        )}
+              ? _(msg`Pause video`)
+              : _(msg`Play video`)
+        }
         accessibilityHint=""
         style={[
           a.flex_1,

src/components/StarterPack/ProfileStarterPacks.tsx

@@ -101,7 +101,7 @@ export function ProfileStarterPacks({
             message={
               emptyStateMessage ??
               _(
-                'Starter packs let you share your favorite feeds and people with your friends.',
+                msg`Starter packs let you share your favorite feeds and people with your friends.`,
               )
             }
             button={emptyStateButton}

src/components/dms/LeaveConvoPrompt.tsx

@@ -40,11 +40,13 @@ export function LeaveConvoPrompt({
     <Prompt.Basic
       control={control}
       title={_(msg`Leave conversation`)}
-      description={_(
+      description={
         hasMessages
-          ? msg`Are you sure you want to leave this conversation? Your messages will be deleted for you, but not for the other participant.`
-          : msg`Are you sure you want to leave this conversation?`,
-      )}
+          ? _(
+              msg`Are you sure you want to leave this conversation? Your messages will be deleted for you, but not for the other participant.`,
+            )
+          : _(msg`Are you sure you want to leave this conversation?`)
+      }
       confirmButtonCta={_(msg`Leave`)}
       confirmButtonColor="negative"
       onConfirm={() => leaveConvo()}