Fixes #5477.

Problem

Hovering the editor only turned the pointer into an I-beam over headings. Paragraphs, code blocks, blockquotes, lists and tables all kept the plain arrow.

Root cause

#2850 stated the affordance in two halves:

• cursor: default on marktext's scrolling mount (.editor-component), so the margins around the text column read as chrome;
• cursor: text on the text column itself — back then #ag-editor-id in src/muya/themes/default.css.

The muya rewrite carried the first half over (it still sits in editor.vue) but not the second: .mu-container, the new engine's text column and the direct analogue of #ag-editor-id, never got the rule. cursor inherits, so the mount's default reached every block, and .mu-container h1..h6 — which states a cursor: text of its own — was the lone survivor. That is exactly the reported symptom.

Verified in the packaged app before the fix:

default    .editor-component
default    .mu-container
text       .mu-container h1      ← the only exception
default    .mu-container p
default    .mu-container pre
default    .mu-container blockquote
default    .mu-container li
default    .mu-container table td

Fix

Put the missing declaration back on .mu-container and drop the heading rule, which is now redundant. Click targets inside the column (links, task checkboxes, the code-copy and copy-anchor buttons, image tools) all state cursor: pointer themselves, so they are unaffected — the added test pins that too. .editor-component keeps its arrow, so the gutters either side of the column still read as chrome, as #2850 intended.

Export output is untouched: exported HTML/PDF is styled by exportStyle.css, not blockSyntax.css.

Test

packages/desktop/test/e2e/issue-5477-editor-text-cursor.spec.ts opens a document with a heading, paragraph, fenced code block, blockquote, task list and table, and asserts for each block both the computed cursor and the cursor of whatever elementFromPoint hits at its centre — the element the pointer actually resolves against. It fails on develop (.mu-container p: expected text, received default) and passes with this change.

🤖 Generated with Claude Code