feat: remove the 10,000-character article body limit and make the New article body optional

features/editor_core.feature

@@ -23,11 +23,11 @@ Feature: Editor screen — load, edit and save an article's body
       the article is a draft; clicking PublishControl itself is out of scope for this slice and
       is specified in a follow-on slice (editor_publish_and_delete)
     And Save is enabled only when useArticleDraft's state is "dirty", the request is not already
-      in flight, the app is not offline, and the body's HTML length is at most 10000 characters;
-      it is disabled in every other case
+      in flight, and the app is not offline, whatever the body's length; it is disabled in every
+      other case
     And Save (a click, or Ctrl/⌘ S) sends PATCH /v1/article/{id} with JSON {"body": "..."},
       the same contract features/edit_article_body.feature already gives the API: 200 with the
-      updated article.Article, 400 for a body over 10000 characters, 404 for an id absent from
+      updated article.Article (any body length, including empty), 404 for an id absent from
       the repository, 401 with no valid session
     And a successful save (200) sets useArticleDraft's state to "saved" and records the save
       time; SaveStatus shows "Saved at {HH:MM}" for the first hour and "Saved {n} min ago" after
@@ -43,11 +43,11 @@ Feature: Editor screen — load, edit and save an article's body
       (features/api_client_global_error_handling.feature): before the redirect, useArticleDraft
       mirrors the current dirty body to sessionStorage keyed by the article's id, so it survives
       the redirect to /login?redirect=/article/{id}/edit&reason=expired
-    And CharacterCounter shows "{len} / 10 000" below the editor, using the body's HTML string
-      length (formatting and images count); at 9000 characters or more (90%, "Near the limit")
-      it adds a warning icon and stays enabled; above 10000 ("Too long") it adds an icon and the
-      text "{over} characters over. Shorten the text or remove an image. Formatting counts too.",
-      and disables both Save and PublishControl until the length is 10000 or fewer again
+    And EditorStatusBar shows a neutral "{words} words · {characters} characters" count with
+      en-US thousands separators (e.g. "1,204 words · 7,318 characters", "0 words · 0 characters"
+      for an empty body); characters is the body's HTML string length, words are the
+      whitespace-separated tokens of its text content; the count has no limit, warning or error
+      styling, per features/article_body_unlimited.feature
     And a Preview switch, when on, replaces the editable ArticleEditor and its toolbar with a
       read-only rendering of the title and body in the content type scale; switching it off
       restores the editable surface with the same content, unchanged
@@ -93,7 +93,7 @@ Feature: Editor screen — load, edit and save an article's body
     And SaveStatus reads "Saved at 11:02"
     And the Save button is disabled
     And PublishControl reads "<publish_label>"
-    And the character counter reads "4 318 / 10 000"
+    And the count reads "{words} words · 4,318 characters"
 
     Examples:
       | is_online | badge  | publish_label |
@@ -161,22 +161,12 @@ Feature: Editor screen — load, edit and save an article's body
     Then a toast reads "That article no longer exists."
     And SaveStatus does not read "Save failed"
 
-  Scenario: Near the limit — the counter warns at 9000 characters without blocking Save
+  Scenario: A very long body keeps a neutral count and leaves Save and Publish enabled
     Given the user is on /article/12/edit with unsaved changes making the body's HTML length
-      9240 characters
-    Then the character counter reads "9 240 / 10 000" with a warning icon
-    And the Save button remains enabled
-
-  Scenario: Too long — over 10000 characters disables Save and Publish until shortened
-    Given the user is on /article/12/edit with unsaved changes making the body's HTML length
-      10214 characters
-    Then the character counter reads "10 214 / 10 000" with the text "214 characters over.
-      Shorten the text or remove an image. Formatting counts too."
-    And the Save button is disabled
-    And PublishControl is disabled
-    When the user shortens the body to 10000 characters or fewer
-    Then the character counter no longer shows the over-limit text
-    And the Save button is enabled again
+      120000 characters
+    Then the count reads "19,845 words · 120,000 characters" with no warning styling
+    And the Save button is enabled
+    And PublishControl is enabled
 
   Scenario: Preview shows the rendered title and body without the editing surface
     Given the user is on /article/12/edit, article titled "How we price a bathroom renovation"