feat(wiki): 異常目錄頁改走專用存取庫，並修正目錄列連結恆空

What：ERROR_CONTENTS 改由 wiki-repo CONTENTS 解析，ERROR_{HASH} 仍走
wiki-repo ERROR，兩者是兩個不同的存取庫。目錄列的連結改用 wiki-url 的絕對網址。
註解掃描的頁面編號樣式補上 40 碼與 H 加 7 碼兩種形狀。

Why：目錄列的網址原本在異常頁寫入之前就取，而頁名的雜湊帶時間戳、每次都是全新頁，
那時查一定是 404，又被吞掉，所以那一格一直都是空的。註解掃描原本只收 8 碼純十六進位，
舊演算法有十三個首碼會改寫成 H 開頭，等於對絕大多數舊頁編號漏偵測。

How：降級語意分兩層——異常頁的存取庫解不出來就整支安靜降級，只有目錄頁解不出來就
只寫異常頁、跳過索引，兩種都維持 exit 0。「只有 exit 4 才准建新頁、7 與 8 一律中止」
那段原樣保留，那是防止把金鑰失效讀成頁面不存在、拿範本蓋掉整頁既有列。

Who：jsc-hooks

skills/hooks-install/SKILL.md

@@ -75,7 +75,7 @@ The detailed flow **MUST run as a sub agent**; the main agent only reports the s
    5. `tools/scan-hook-errors.sh --cli {cli}` — only claude keeps hook results in its native records and can answer `clean` or `errors`; codex, copilot, antigravity and kiro answer `unavailable`, and their runtime evidence comes from the smoke stage alone. Exit 0 covers both `clean` and `unavailable`, exit 1 is `errors` and every entry with `jsc=true` goes to step 3, exit 2 is a bad CLI name.
 
    Done when every detected CLI has exactly one verdict line per stage, no stage exited 2, the smoke stage's `lines` count matches its own assertion, the four non-claude CLIs are reported as `unavailable` rather than clean on the scan stage, and antigravity and kiro carry the note that their hook firing is unverified.
-3. For each error — a failed purge, a failed wiring, an `unwired` status, a failed smoke, or a scanned error with `jsc=true` — run `tools/report-error.sh --hook {script name} --exit {code} --summary "{reason}" --cli {cli}` with the script's `[jsc]` output on stdin, then hand the failure to `jsc-hooks:repair`, which **MUST run as a sub agent** and must finish by opening a PR against `develop`. Aborting the remaining installs here is allowed as long as the repair starts. Exit 0 with an `ERROR_{HASH}` page name and URL on stdout means the page was written; exit 0 with empty output means `JSC_WIKI_REPO_ERROR` and `JSC_WIKI_REPO` are both unset, so carry that reason into step 4 instead; exit 2 means the call itself was malformed — `--hook` or `--summary` is missing — so fix the arguments and rerun the same call; exit 4 means the wiki record did not land, so report the failure text and still start the repair — a page that could not be written is no reason to leave a broken hook wired. Exit 4 covers two cases, and the report has to say which: a failed write, or the script refusing to write the error directory page because it could not read the old one back. That directory is appended to, never overwritten: every row on it is somebody else's error report, so the script reads the page, adds this run's row, and writes the whole page. Only a genuine 404 (`wiki-get` exit 4) means the page is not there yet and lets it build one from the template. An invalid key (exit 7) or any other API failure (exit 8) leaves the old rows unknown, so it skips the directory write and names the code instead — writing a fresh template over a directory it never read would erase every earlier report, with no merge and no backup behind it. A scanned error with `jsc=false` belongs to a third-party hook: report it and leave it alone. Skip this step when every CLI passed all five stages. Done when every error carries one `ERROR_{HASH}` result — a page name and URL, or the recorded reason no page was written — and one repair PR URL against `develop`.
+3. For each error — a failed purge, a failed wiring, an `unwired` status, a failed smoke, or a scanned error with `jsc=true` — run `tools/report-error.sh --hook {script name} --exit {code} --summary "{reason}" --cli {cli}` with the script's `[jsc]` output on stdin, then hand the failure to `jsc-hooks:repair`, which **MUST run as a sub agent** and must finish by opening a PR against `develop`. Aborting the remaining installs here is allowed as long as the repair starts. The error page and the error directory page live in two different wiki repos, resolved separately: the page through `wiki-repo ERROR`, the directory through `wiki-repo CONTENTS`. Exit 0 with an `ERROR_{HASH}` page name and URL on stdout means the page was written; the same exit 0 with a `[jsc]` line on stderr still means the page landed, and that line says what is missing — either the directory repo would not resolve, so nothing indexes the page, or the page URL could not be read back, so the page name comes out on its own — carry that note into step 4. Exit 0 with no output at all means the run ended on one of the quiet-degradation reasons listed in the script's own header — no `gitea.sh` on the path, the error page's wiki repo unresolved, the hash not computed, or a temp file not created — so no page was written at all and that reason goes into step 4 instead; exit 2 means the call itself was malformed — `--hook` or `--summary` is missing — so fix the arguments and rerun the same call; exit 4 means the wiki record did not land, so report the failure text and still start the repair — a page that could not be written is no reason to leave a broken hook wired. Exit 4 covers two cases, and the report has to say which: a failed write, or the script refusing to write the error directory page because it could not read the old one back. That directory is appended to, never overwritten: every row on it is somebody else's error report, so the script reads the page, adds this run's row, and writes the whole page. Only a genuine 404 (`wiki-get` exit 4) means the page is not there yet and lets it build one from the template. An invalid key (exit 7) or any other API failure (exit 8) leaves the old rows unknown, so it skips the directory write and names the code instead — writing a fresh template over a directory it never read would erase every earlier report, with no merge and no backup behind it. A scanned error with `jsc=false` belongs to a third-party hook: report it and leave it alone. Skip this step when every CLI passed all five stages. Done when every error carries one `ERROR_{HASH}` result — a page name with its URL, a page name plus the reason the URL is missing, or the recorded reason no page was written — and one repair PR URL against `develop`.
 4. Report five results per CLI — purge, wiring, status, smoke, scan — each with the reason its script printed, plus the smoke `lines` count, any `ERROR_{HASH}` page name and every repair PR URL. Done when every detected CLI appears with one verdict per stage and every repair has a PR against `develop`.
 
 ## Notes