FIX: small bug with topics and my posts translations (#22179)

1. `everything` was changed to `topics`
2. Path for my posts translation is `sidebar.sections.community.links.my_posts.content` not `sidebar.sections.community.links.my/posts.content`

app/assets/javascripts/discourse/app/lib/sidebar/common/community-section/everything-section-link.js

@@ -40,7 +40,7 @@ export default class EverythingSectionLink extends BaseSectionLink {
   }
 
   get title() {
-    return I18n.t("sidebar.sections.community.links.everything.title");
+    return I18n.t("sidebar.sections.community.links.topics.title");
   }
 
   get text() {

app/assets/javascripts/discourse/app/lib/sidebar/user/community-section/my-posts-section-link.js

@@ -74,7 +74,7 @@ export default class MyPostsSectionLink extends BaseSectionLink {
       return I18n.t(
         `sidebar.sections.community.links.${this.overridenName
           .toLowerCase()
-          .replace(" ", "/")}.content`,
+          .replace(" ", "_")}.content`,
         { defaultValue: this.overridenName }
       );
     }

spec/system/viewing_sidebar_spec.rb

@@ -89,4 +89,32 @@ describe "Viewing sidebar", type: :system do
       expect(header_dropdown).to be_visible
     end
   end
+
+  describe "Community sidebar section", type: :system do
+    fab!(:user) { Fabricate(:user, locale: "pl_PL") }
+    fab!(:translation_override) do
+      TranslationOverride.create!(
+        locale: "pl_PL",
+        translation_key: "js.sidebar.sections.community.links.topics.content",
+        value: "Tematy",
+      )
+      TranslationOverride.create!(
+        locale: "pl_PL",
+        translation_key: "js.sidebar.sections.community.links.topics.title",
+        value: "Wszystkie tematy",
+      )
+    end
+
+    before { SiteSetting.allow_user_locale = true }
+
+    it "has correct translations" do
+      sign_in user
+      visit("/latest")
+      links = page.all("#sidebar-section-content-community .sidebar-section-link-wrapper a")
+      expect(links.map(&:text)).to eq(%w[Tematy Wysłane])
+      expect(links.map { |link| link[:title] }).to eq(
+        ["Wszystkie tematy", "Moja ostatnia aktywność w temacie"],
+      )
+    end
+  end
 end