feat(wiki): 體檢目錄頁改走專用存取庫，並補齊設定規格表

What：CHECK_CONTENTS 改由 wiki-repo CONTENTS 解析並透過 wiki-contents.sh upsert
寫入，CHECK_{HASH} 仍走 wiki-repo CHECK。目錄頁新增一欄裸 HASH 當比對鍵。主機名
改由程式取短名，不再交給模型自由填。

Why：比對鍵原本是含網址的儲存格，換主機或換存取庫就比對不到，每跑一次體檢就替同一台
機器多附一列，畫面上還看不出來。主機名短名與 FQDN 不一致時，同一台機器會分裂成兩張頁，
而助理巡檢那邊是用程式取值的，兩邊對不起來。

How：設定規格表同一輪補齊三處既有缺漏——補上漏掉的 JSC_WIKI_REPO_MONITOR，體檢本來
看不到它而孤兒掃描還會誤報；刪掉指向不存在頁面的 MAINTAIN 內容頁字樣；MAINTAIN 那一列
改成不需要使用者處理，免得體檢叫人去設一支管不到任何頁的變數。整列保留，刪掉會讓孤兒
掃描開始誤報那個變數。

Who：jsc-cli

skills/doctor/SKILL.md

@@ -1,6 +1,6 @@
 ---
 name: doctor
-description: Health-check the execution environment in one pass and record the result, changing nothing. Four checks - plugin versions from jsc-hooks/hooks/version-guard.sh report, hook wiring from jsc-hooks/tools/wire-cli.sh status, settings from tools/scan-config.sh against tools/config-spec.tsv, and orphan variables. Report one findings table per check, build the 待修項目 table with tools/build-todo.sh, then write the whole run to wiki CHECK_{HASH} where HASH comes from {hostname}/{user}; the page keeps only the latest run. Use after installing or updating the skill set, when a skill fails on a settings or wiring problem, or before handing a machine over; not for applying fixes, which is jsc-cli:setup.
+description: Health-check the execution environment in one pass and record the result, changing nothing. Four checks - plugin versions from jsc-hooks/hooks/version-guard.sh report, hook wiring from jsc-hooks/tools/wire-cli.sh status, settings from tools/scan-config.sh against tools/config-spec.tsv, and orphan variables. Report one findings table per check, build the 待修項目 table with tools/build-todo.sh, then write the whole run to wiki CHECK_{HASH} where HASH comes from {short hostname}/{user}; the page keeps only the latest run, while its CHECK_CONTENTS row is upserted through wiki-contents.sh into the contents repo. Use after installing or updating the skill set, when a skill fails on a settings or wiring problem, or before handing a machine over; not for applying fixes, which is jsc-cli:setup.
 ---
 
 # doctor — execution environment health check
@@ -102,18 +102,47 @@ Done when all five blocks of 2.1 are on screen with the scanned directory stated
 
 ### 3.1 Record
 
-Write the page through `jsc-gitea:wiki`:
+This run writes two pages, and they live in **two different wiki repos**. Resolve each repo on its own and never reuse one for the other.
 
-- Wiki repo: `jsc-gitea/tools/gitea.sh wiki-repo CHECK`.
-- Page name: `CHECK_` plus `gitea.sh hash-id "{hostname}/{user}"` — the host and the login account, not `{owner}/{repo}`. Doctor checks a machine, and it has to work in directories that are not repositories at all.
-- `CHECK_{HASH}` is a **content page**: overwrite the whole page, because this page type keeps only the latest run of this one machine.
-- `CHECK_CONTENTS` is a **contents page** and follows the opposite rule: read it back first, then upsert this machine's row from `templates/check-contents.md` in the same pass — add the row if missing, otherwise refresh its 必要項缺漏、設定錯誤、最後體檢 columns. Never overwrite the whole page, and never touch a row belonging to another machine: those rows are other people's records, and this run never read them from anywhere else.
-- The `CHECK_CONTENTS` read branches by exit code, and only exit 4 opens the create path. Exit 0 means the page is there, so upsert into what came back. Exit 4 means the page really does not exist yet, so build it from the template. Exit 7 (key invalid or no permission) and exit 8 (any other API failure) both mean the old rows are unknown, never that the page is missing: skip the `CHECK_CONTENTS` write, name the exit code in the report, and create nothing. Writing a fresh template over a directory whose rows were never read wipes every other machine's row, and the write carries no merge and no backup.
+**The HASH — take it from the machine, do not compose it by hand.** `jsc-assist`'s `MONITOR_{HASH}` claims the same hash source and takes it in code, so the two pages only ever line up when this skill takes it the same way:
 
-`wiki-repo` exiting 3 means no wiki repo is configured for CHECK. Print the tables, skip the wiki write, and put `JSC_WIKI_REPO_CHECK` at the top of 待修項目 — that unset variable is itself a finding, so a failed write never fails the health check. Any other non-zero exit from `wiki-repo`, `hash-id` or the wiki write is reported the same way: tables on screen, write skipped, exit code named.
+```sh
+host=$(hostname 2>/dev/null || uname -n 2>/dev/null || printf 'unknown'); host=${host%%.*}
+user=${USER:-$(id -un 2>/dev/null || printf 'unknown')}
+```
+
+`${host%%.*}` is the point of the snippet: `hostname` prints the FQDN on some machines and the short name on others, so a hand-written value gives one machine two pages that never merge again. Pass `"{host}/{user}"` to `gitea.sh hash-id` and use exactly what it prints. It is the host and the login account, not `{owner}/{repo}` — doctor checks a machine, and it has to work in directories that are not repositories at all.
+
+**`CHECK_{HASH}` — content page.** Repo: `jsc-gitea/tools/gitea.sh wiki-repo CHECK`. Write it through `jsc-gitea:wiki` and overwrite the whole page, because this page type keeps only the latest run of this one machine. Whole-page overwrite is correct here and forbidden on the page below.
+
+**`CHECK_CONTENTS` — contents page, in the contents repo.** Repo: `gitea.sh wiki-repo CONTENTS`. Every contents page lives there now; it never falls back to `JSC_WIKI_REPO_CHECK`. Do not hand-edit it — write the row with
+
+`jsc-gitea/tools/wiki-contents.sh upsert CHECK 4 "{HASH}" {row file} templates/check-contents.md`
+
+The script reads the page back, replaces this machine's row or appends it, then writes the whole page. That keeps the rule in one place: one row per run, never a whole-page overwrite, never another machine's row — those rows are other people's records, and this run read them from nowhere else.
+
+**The key is column 4, the bare `HASH`.** `4` is the 1-based index of the `HASH` column in `templates/check-contents.md`, and the key is the exact string `hash-id` printed — 40 uppercase hex characters, not shortened, not prefixed, not wrapped in a link. The script compares the whole cell, so the key and that cell must match character for character.
+
+The key is the bare hash and not the link cell for a reason: a cell holding a URL changes whenever `GITEA_HOST` changes, whenever `JSC_WIKI_REPO_CHECK` moves to another repo, or whenever Gitea encodes the page name differently. The comparison then never matches, and every run appends another row for the same machine — silently, because the page still looks right.
+
+Column 1 stays the human-facing link and is never the key. Build it as an **absolute URL** from `gitea.sh wiki-url {CHECK repo} CHECK_{HASH}`. `[[CHECK_{HASH}]]` resolves only inside its own wiki, and the two pages are no longer in the same one. Fetch the URL after `CHECK_{HASH}` is written: `wiki-url` exits 4 on a page that does not exist yet.
+
+| Exit | Meaning | Action |
+| --- | --- | --- |
+| 0 | `updated` or `added` | Report which one it printed, with the repo and page it named |
+| 1 | Write failed | Nothing landed. Report it with the stderr, and keep 2.1's tables on screen |
+| 2 | Usage error | Report it as a defect in this skill. Do not retry with guessed arguments. A `templates/check-contents.md` that is not on disk also lands here — then name the path the script looked for, confirm the plugin install is complete, and rerun |
+| 3 | No contents repo configured | Skip this write and put `JSC_WIKI_REPO_CONTENTS` at the top of 待修項目 |
+| 4 | Page absent and no template given | Unreachable the way this skill calls the script — the command above always passes `templates/check-contents.md`. A template that is not on disk comes back as exit 2, not 4. So treat a 4 as a malformed call: report it as a defect in this skill, name the command that produced it, and do not retry with guessed arguments |
+| 7 | Key invalid or no permission | Nothing was read and nothing written. Name the exit code and create nothing |
+| 8 | Any other API failure | Same as 7: the old rows are unknown, so name the exit code and create nothing |
+
+Exits 7 and 8 never mean the page is missing. Writing a fresh template over a directory whose rows were never read wipes every other machine's row, with no merge and no backup behind it — which is exactly why the script creates a page only when its own read reported that page absent, and why it owns that branch instead of this prose.
+
+`wiki-repo` exiting 3 means that page type has no wiki repo configured: `JSC_WIKI_REPO_CHECK` for the content page, `JSC_WIKI_REPO_CONTENTS` for the contents page. Print the tables, skip that one write, and put the unset variable at the top of 待修項目 — it is itself a finding, so a failed write never fails the health check. Any other non-zero exit from `wiki-repo`, `wiki-url`, `hash-id` or the wiki write is reported the same way: tables on screen, write skipped, exit code named.
 
 ### 3.2 Hand off
 
 State the four counts from 2.2's `summary` line: required items missing, settings invalid, CLIs unwired, domains behind. Recommend `/jsc-cli:setup` when any of those is above zero. Never fix anything here.
 
-Done when either the wiki page URL is reported or the skipped write is reported together with its reason, **and** the four counts are stated with the recommendation given or explicitly withheld.
+Done when each of the two pages is reported with its URL, or its skipped write is reported together with its reason, **and** the four counts are stated with the recommendation given or explicitly withheld.