[cdalar]

Follow-up to #1247. The hover # next to every heading on onctl.sh (homepage sections and docs pages alike) now copies the heading's full URL to the clipboard when clicked, and shows Link copied beside the # for 1.5 s. The default behaviour (hash goes in the address bar, page scrolls there) is unchanged.

Implementation: docs/src/theme/Heading/ is an ejected copy of theme-classic's Heading with the hash link swapped for one that also writes to navigator.clipboard. Details:

• the theme's own .hash-link CSS is carried over, since only the original component loads it;
• the link stays visible while in the copied state, because the click scrolls the heading out from under the cursor and the hover rule alone would hide the feedback;
• the toast sits to the right of the #, not above it, since the heading lands just under the sticky navbar;
• on touch screens (hover: none) the # is always visible.

Verified with headless Chrome against npm run build output: clipboard gets http://host/#tui on the homepage and http://host/docs/getting-started#initialize on a docs page, the toast appears and is gone after 1.6 s, light and dark mode both fine. npm run typecheck and npm run build pass.

🤖 Generated with Claude Code

https://claude.ai/code/session_01J3DrQy8Pdg8KsM31aMxJaM

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 47.57%. Comparing base (1d79ad2) to head (112810b).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1248   +/-   ##
=======================================
  Coverage   47.57%   47.57%           
=======================================
  Files          81       81           
  Lines        9341     9341           
=======================================
  Hits         4444     4444           
  Misses       4897     4897           

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