fix(cc-discovery): symlinked .md files + seed Waiting fixture + KO doc-coverage

[hoangsonww]

Three independent enhancements, one commit each:

1. fix(cc-discovery): follow symlinked agent/command/hook markdown files

Completes what #232 started. #232 taught skill directory discovery to follow symlinks (isDirLike), but the same Dirent quirk (ent.isFile() is false for a symlink pointing at a regular file) still hid symlinked .md files everywhere else — an agent, command, output style, or hook script linked into ~/.claude via ln -s stayed invisible to the Config Explorer while Claude Code itself resolves and uses it.

• New isFileLike(ent, absPath) — exact file counterpart of isDirLike: ent.isFile() short-circuit (no extra stat for regular files), statSync follows symlinks, broken links are non-files rather than throws.
• Applied at all four enumeration sites: readMdFilesAt (agents / commands / output-styles), countMdIn (plugin contribution counts), the plugin hooks counter, and readHookScripts.
• Tests: symlinked agent .md discovered, broken symlink skipped without throwing, direct isFileLike unit coverage (file-symlink → true, dir-symlink → false).

2. feat(seed): stable waiting-on-input fixture

A freshly seeded dashboard never showed the Waiting overlay — both stable fixtures cover only working/idle states, so the yellow badge, the awaiting_reason chip/tooltip (#233), the Kanban Waiting column, and SessionDetail's waiting-for-input banner were all undemonstrable without a live blocked session.

New third idempotent fixture demo-waiting-…: active session, main agent blocked on a permission prompt, awaiting_input_since stamped ~4 minutes in the past (banner's "how long" readout renders something real), awaiting_reason = "notification" (the urgent/amber path). Wired into FIXTURE_SESSION_IDS so --reset cleans it like the others; listed in the printed test URLs. Verified against a scratch DB: insert → correct rows on session + agent, re-run → skipped.

3. chore(skills): README-KO.md in the doc-coverage matrix

The update-project-docs skill's mapping already lists README-KO.md as part of the canonical doc set, but doc-coverage.sh never checked it — Korean-README drift scored a clean matrix (had to be hand-checked in recent sweeps). Adds the KO row.

Testing

• npm run test:server — 656/656 (6 new discovery tests)
• npm run test:client — 261/261
• File-header audit clean, Prettier clean
• Seed verified twice against a throwaway DASHBOARD_DB_PATH (never the real DB)
• doc-coverage.sh awaiting_reason now reports the KO column (6 hits)
• Not run: mcp:typecheck (mcp/ untouched)

🤖 Generated with Claude Code

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[gemini-code-assist]

Code Review

This pull request introduces a new isFileLike helper function in server/lib/cc-discovery.js to correctly resolve and handle symlinks pointing to regular files, replacing previous .isFile() checks across several file discovery functions. Unit tests have been added to verify this behavior, including handling broken symlinks. Additionally, a new 'waiting-on-input' demo session has been added to the database seeding script to exercise the Waiting UI elements, and the Korean translation README (README-KO.md) has been added to the documentation coverage script. There are no review comments, and I have no feedback to provide.

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