panel-redesign: Server pages and Help on the kit; the help drawer is gone

Stage 2, step 6. Written by Sonnet, reviewed by Opus.

  - Six pages named after their mockups: system-log, backup, users,
    user, user-delete, help, with typed page data (view/server.go,
    help.go), fixtures and tests. The old templates of the six are gone
    (user_form.html, encrypt_fields.html deleted, the others rewritten)
    and their names are off legacy_pages.txt, which now holds mail_queue
    alone.
  - Help is six help_topic blocks (checks, certificate, rdns, dns, apps,
    limits); a test renders every fixture page and fails on a Help link
    without a topic. The help drawer (help_drawer.html and its includes
    in layout_legacy.html) is removed; its rules in legacy.css go with
    the next step.
  - The user form sets the user's e-mail (plan, Account e-mail): create
    and update, validated, and a changed address resyncs DMARC for a
    user whose default is the account e-mail - through the helper the
    Account profile now shares.
  - Handlers pass typed data; routes, POST targets, field names,
    validation and authorization are unchanged. A test loads the user
    form for four reach combinations and for the only global user, posts
    it back untouched and finds the user unchanged.

Fixed on the way
  - The user delete confirmation said the domains were not affected. A
    domain that follows the user's default report address is left with
    none; the page names those domains now.
  - A refused backup lost the encryption choice and printed a literal
    <code> element in its message.

Differences from the mockups, for the owner:
  - Help has no DMARC and no Inbound topic: its outline fixes two boxes
    of three topics, although other mockups link to #dmarc and #inbound.
    Until the owner decides, Account's Help link goes to #dns and the
    inbound MX box has none;
  - system log: newest line first, as drawn; "refreshes on its own" (5 s
    active, 30 s idle); only status=, warning: and error: lines are
    coloured;
  - backup: the file field is a plain file input; the encryption box is
    ticked, as drawn and as on the domain export, so a plain download
    means unticking it first;
  - users: an E-mail column; the flash does not name the user;
  - user form: no lead; the domain lists are no longer hidden by script
    when Global is chosen (the server ignores them for that role).

Evidence
  - docs/assets/panel-redesign/evidence/system-log.png, backup.png,
    users.png, user.png, user-delete.png, help.png: 1440 px wide,
    headless Edge, real templates served locally with their fixtures -
    NOT from the container (no Docker on this machine).
  - panel/audit.js on the six pages at 1440 and 1280: 720 texts checked,
    problems: [].
  - The system log's polling swap was not exercised in a browser; it
    uses the mechanism of Overview and Health.
  - go test -count=1 ./internal/web/... ./cmd/panel
      ok  internal/web
      ok  internal/web/auth
      ok  internal/web/handlers
      ok  internal/web/validate
      ok  internal/web/view
      ok  cmd/panel

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

internal/web/handlers/handlers_monitor.go

@@ -385,15 +385,7 @@ func (h *Handlers) HandleSystemLog(w http.ResponseWriter, r *http.Request) {
 	if _, ok := h.requireGlobal(w, r); !ok {
 		return
 	}
-	lines, errText := h.readLogTail()
-	h.view.Render(w, http.StatusOK, "system_log", map[string]any{
-		"Title":    "SelfPost — system log",
-		"User":     auth.CurrentUser(r),
-		"Active":   "system_log",
-		"IsGlobal": true,
-		"Lines":    lines,
-		"Error":    errText,
-	})
+	h.view.Render(w, http.StatusOK, "system-log", h.systemLogPage(r))
 }
 
 // HandleSystemLogBody serves the HTMX polling fragment for the log-tail view.
@@ -401,11 +393,21 @@ func (h *Handlers) HandleSystemLogBody(w http.ResponseWriter, r *http.Request) {
 	if _, ok := h.requireGlobal(w, r); !ok {
 		return
 	}
-	lines, errText := h.readLogTail()
-	h.view.RenderFragment(w, http.StatusOK, "system_log_body", map[string]any{
-		"Lines": lines,
-		"Error": errText,
-	})
+	h.view.RenderFragment(w, http.StatusOK, "system_log_body", h.systemLogPage(r))
+}
+
+// systemLogPage reads the tail of mail.log and splits each line into the time
+// and the text the page shows it in, as the delivery log of one message does. A
+// line whose head is not a timestamp the log format recognises keeps its whole
+// text and no time: nothing is dropped from what the log says.
+func (h *Handlers) systemLogPage(r *http.Request) *view.SystemLog {
+	raw, errText := h.readLogTail()
+	lines := make([]view.LogLine, len(raw))
+	for i, line := range raw {
+		stamp, rest := logtail.SplitTimestamp(line)
+		lines[i] = view.LogLine{Time: stamp, Text: rest, Level: view.LogLineLevel(rest)}
+	}
+	return view.NewSystemLog(h.shellMeta(r), lines, errText)
 }
 
 func (h *Handlers) readLogTail() ([]string, string) {