feat(nodes): edit XHTTP link options as fields

[Glassyiris]

Problem

honk accepts XHTTP options in a vless or trojan link's extra JSON, but the node dialog only offered the raw link, so changing padding, headers, POST pacing or a download peer meant hand-editing percent-encoded JSON. An edited link that honk cannot read was also written to the source anyway: honk's parser drops such a node entry with only a warning, so the reload succeeded and the node silently disappeared. Adding a node with a link over the API's 8192-character limit failed only at the backend.

How I fixed it

src/dae/xhttp.ts reads an XHTTP link into fields and writes back only the parameters whose value changed, keeping every other byte, unknown extra members and the link unchanged when nothing changed; links it cannot represent exactly are left to the raw field. A lazily loaded XhttpOptions disclosure in the add and edit node dialogs edits mode, path, host, headers, padding, POST pacing and the download peer through it. Before the source write, an edited link is checked alone with POST /config/validate in syntax mode, and any error, or any warning whose code is not legacy-*, refuses it with honk's reason; creation refuses links over 8192 characters. The check and the source edit share nodeKey, which quotes a node named mux: honk rejects a bare mux: line as the removed standalone setting, so the check refused valid edits of such a node and a rename to mux broke the source. Strings are added to en, zh-CN and zh-TW, with docs/pages*.md and a changelog fragment.

Verified

pnpm typecheck, pnpm lint, pnpm check:i18n, pnpm format:check and pnpm check:gen pass. check:size passed locally but CI measured the startup paths at 238517 and 342247 bytes, over the 238300 and 341850 limits, because the startup paths carry the largest language catalogue and the new strings add to it; the second commit raises startupLogin to 238700 and startupActivity to 342450. pnpm vitest run: 3760 passed, 1 failed (view.test.ts "gives an expiry to the minute…"), which fails identically on main with this machine's locale data; the new nodes.test.ts mux case fails with nodeKey replaced by quoteName. playwright test e2e/nodes.spec.ts on Chromium: 89 passed on the final head; together with e2e/a11y.spec.ts, 148 passed before the last commit. Against a local honk-core (mock eBPF, native_api serving dist/), a node added through the fields was written as expected, an edit to xPaddingBytes: 0-10 was refused with "XHTTP xPaddingBytes must stay within 1-8192" and left the source untouched, and a valid edit was saved. Not run: the full e2e suite, WebKit/Firefox, screenshots of the new fields. The legacy-* rule and the per-field honk messages come from Glassyiris/honk#140, merged into feat/native-api; with an older honk the guard still refuses skipped links, but the range message is the generic one. A matching doona-docs change has not been opened.

Submitted and answered for by (Human responsible, GitHub username): @Glassyiris

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• I understand this change and will answer for every line. An AI cannot answer for me.
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• Each commit contains one coherent change with an English type(scope): subject and a short English body.
• I ran the applicable CI gates in CONTRIBUTING.md; the Verified section records the commands, results and any checks I could not complete.
• I updated the strings in en.json and in every complete language's catalogue when I changed interface text.
• I attached light and dark screenshots when I changed the interface appearance.
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[Glassyiris]

Companion honk change: Glassyiris/honk#140 (static rejection reasons for node/provider creation and the documented legacy-* warning rule this dialog's edit check relies on).

[Zakkaus]

Thanks, the read/write split works: an unchanged link comes back byte for byte, and checking the edited link with POST /config/validate before the source write is the right guard. A few things before merge:

1. The edit dialog shows the length limit but still saves. useNodesPage.ts:504 puts nodeFormReason('node', …) in formReason for editNode, so an edited link over 8192 characters shows "too long", while formValid comes from nodeEditState and Save stays enabled. The comment at view.ts says a longer link still fits a source edit, so the length check should apply to node (create) only.
2. Header names are written as typed. xhttp.ts:126 keeps a name with surrounding spaces, and Object.fromEntries keeps only the last of two rows with the same name, without telling the user. Please trim the names and mark a duplicate name on its row.
3. Rejections are shown in English. useNodesPage.ts:67 passes the diagnostic's raw message into nodes.linkRejected. diagnosticMessage in src/i18n/backend.ts:148 already turns a ConfigDiagnostic into the translated text; please use it here.
4. The header comment says more than the code does. xhttp.ts:2 says every other byte survives. That holds for the query, but any field edit writes extra back through JSON.parse and JSON.stringify, so its spacing changes, and integers past 2^53 would lose precision. Please describe that in the comment.
5. Screenshots. The dialog changes, so please attach light and dark screenshots of the XHTTP section, closed and open.
6. Checklist and commits. The boxes for understanding the change, the commit format and the gates are unchecked, and the three commits have no body. CONTRIBUTING asks for a short English body on each.
7. Rebase. Since #541 merged, package.json conflicts on startupActivity. Keep your 342450: main plus this branch comes to about 342,400 by the CI numbers.

[Zakkaus]

衝突也需要解決