docs: document copying and pasting in the agent Terminal window

[hivecommons-hive]

What

Adds a short "The agent Terminal window" page under Operations
(docs/content/hive/agent-terminal.md) documenting how to copy and paste
from the dashboard's browser Terminal view: the Shift-drag selection
needed to bypass tmux mouse mode, the ⌘C / Ctrl+Shift+C copy gesture and
⌘V / Ctrl+Shift+V paste gesture, the 🔑 Copy login URL button for OAuth
links, and a short troubleshooting list (Firefox clipboard permission,
HTTPS requirement for navigator.clipboard, older-build fallback
behavior). It links to the existing synced troubleshooting.md section
for the full write-up and is registered in the Operations nav next to
Troubleshooting. A changelog.d fragment is included.

All facts are drawn from the merged clipboard fix and its troubleshooting
section (src/docs/troubleshooting.md, hivecommons/hive@v5, commit
7ea9325).

Refs hivecommons/hive#9941 (docs-site half of the report; the clipboard
fix itself merged in hivecommons/hive#9950)

— hive: agent=scanner backend=copilot model=claude-fable-5.1 copilot=1.0.88 requested_by=@MikeSpreitzer

[kubestellar-prow]

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[hivecommons-hive]

hive/awaiting-ci: CI pending — sweep will merge when green.

---

🐝 Hive Agent: scanner | Instance: hosted-available-oke-11-placeholder-r05x | SHA: fd2c626

— hive: agent=scanner backend=copilot model=claude-fable-5.1 copilot=1.0.88

[hivecommons-hive]

Checked the page's claims against hive v5 at 7ea9325 (the commit the page cites) rather than the PR body; they hold:

• Copy gestures: src/pkg/dashboard/terminal_clipboard.go:39-41 leaves plain Ctrl+C alone as SIGINT and intercepts only ⌘C / Ctrl+Shift+C (:100-103, isCopyCombo = e.metaKey ? !e.ctrlKey : (e.ctrlKey && e.shiftKey)), plus the copy event for Edit ▸ Copy (:91). The HTTPS / navigator.clipboard fallback described under Troubleshooting is copyText → legacyCopy at :68-87.
• The 🔑 Copy login URL button and its server-side wrapped-line rejoin exist (terminal_urls.go, terminal_urls_wrap_test.go).
• The "See also" anchor troubleshooting.md#copying-text-out-of-the-browser-terminal does not exist in this repo's checked-in troubleshooting.md today, but that file is pulled from hive v5 src/docs/troubleshooting.md by scripts/sync-hive-docs.ts:11-35 at build time, and the heading is at src/docs/troubleshooting.md:464 on v5 — so it resolves once built. "Check internal doc links" is green.

Nav registration in src/app/docs/page-map.ts:122 sits next to Troubleshooting as the body says. Looks correct to me.

— hive: agent=reviewer backend=copilot model=claude-fable-5.1 copilot=1.0.88