site: cut the template's own labels out of the pages

Point 7 of the page-wording review. The pages no longer show their data
structure as headings, and they no longer explain their own conventions.

- Level 1 is one screen: claim, status badge, three figures, the technology
  row, and one sentence carrying one link. Measured in headless Chrome at
  1440x900: 1404-1845 px tall before, exactly 900 px (no scroll) after, on
  all six area pages.
- DocPage: no kicker line, no visible level label, no "Evidence for this
  page" heading or instruction note, no "Drill-downs" list, no
  "Status <word> - sentence" footer. The artefact table starts at level 2,
  under the heading "Artefacts"; the history timeline is level 2 only.
- Landing page: "Start here" link text gone, "How to read this site" panel
  gone, the footer's status-label explainer gone.
- Content, presentation only, no claim softened: the leading H1 that
  duplicated the page title removed from all 41 documents; level 1 bodies
  reduced to the constraint as ordinary prose plus the way in;
  "**Status: ...**" prefixes removed from the artefact stubs; "## Drill-downs"
  and "## Period and confidence" removed from the level 2 pages, with the
  cross-area links moved into the prose.
- The six level 1 claims are now sentences with a subject, and use commas
  instead of middots. Same facts, no new ones.

Not in this commit: the 35 level 2 and 3 claims still use the compact CV
style. That is a voice decision for Sam, not a wording tidy-up.

make validate: 41 documents, 0 violations. go test ./...: pass.

(cherry picked from commit 03009f80fc7815ad7719412e125df9297a6e653f)

internal/web/templates/pages.templ

@@ -23,17 +23,6 @@ templ HomePage(v HomeView) {
 				@PillarCard(c)
 			}
 		</section>
-
-		<section class="honesty" aria-labelledby="how-to-read">
-			<h2 id="how-to-read">How to read this site</h2>
-			<ul>
-				<li><strong>Level 1</strong> is one screen per area: the claim, the numbers, the way in.</li>
-				<li><strong>Level 2</strong> is what is actually run, with an evidence table and the trade-offs.</li>
-				<li><strong>Level 3</strong> is the artefact: code, diagram, screenshot, log.</li>
-				<li>Every claim carries a <strong>status</strong>, and finished, running, in-progress and abandoned are all shown as they are.</li>
-				<li>Every artefact is at most three clicks from here, and the <a href="/evidence/">evidence index</a> lists all of them on one page.</li>
-			</ul>
-		</section>
 	}
 }
 
@@ -42,7 +31,6 @@ templ DocPage(v DocView) {
 	@Layout(v.Layout) {
 		<article class="doc">
 			<header class="doc-head">
-				<p class="doc-kicker">{ v.AreaTitle } · { v.LevelLabel }</p>
 				<h1 class="doc-title">{ v.Doc.Title }</h1>
 				<p class="doc-claim">{ v.Doc.Claim }</p>
 				<div class="doc-chips">
@@ -70,35 +58,35 @@ templ DocPage(v DocView) {
 				@v.Body
 			</div>
 
-			if len(v.Evidence) > 0 {
+			// Level 1 is one screen: the claim, the figures, the technology and the
+			// link in the prose. The evidence table starts at level 2, which is the
+			// page that argues for the claim.
+			if v.Doc.Level >= 2 && (len(v.Evidence) > 0 || len(v.SubPages) > 0) {
 				<section class="doc-evidence" aria-labelledby="evidence-heading">
-					<h2 id="evidence-heading">Evidence for this page</h2>
-					<p class="section-note">Select a row to load the artefact into the presentation panel. Each row is also a link, so this works without JavaScript.</p>
-					@EvidenceTable(evidenceRows(v.Evidence))
+					<h2 id="evidence-heading">Artefacts</h2>
+					if len(v.Evidence) > 0 {
+						@EvidenceTable(evidenceRows(v.Evidence))
+					}
+					if len(v.SubPages) > 0 {
+						<ul class="drill-list">
+							for _, s := range v.SubPages {
+								<li>
+									<a href={ templ.SafeURL(s.Href) }>{ s.Label }</a>
+									<span class="drill-kind">{ s.Kind }</span>
+								</li>
+							}
+						</ul>
+					}
 				</section>
 			}
 
-			if len(v.Timeline) > 0 {
+			if v.Doc.Level == 2 && len(v.Timeline) > 0 {
 				<section class="doc-timeline" aria-labelledby="timeline-heading">
 					<h2 id="timeline-heading">In time order</h2>
 					@Timeline(v.Timeline)
 				</section>
 			}
 
-			if len(v.SubPages) > 0 {
-				<section class="doc-sub" aria-labelledby="sub-heading">
-					<h2 id="sub-heading">{ subHeading(v.Doc.Level) }</h2>
-					<ul class="drill-list">
-						for _, s := range v.SubPages {
-							<li>
-								<a href={ templ.SafeURL(s.Href) }>{ s.Label }</a>
-								<span class="drill-kind">{ s.Kind }</span>
-							</li>
-						}
-					</ul>
-				</section>
-			}
-
 			if len(v.Backlinks) > 0 {
 				<section class="doc-back" aria-labelledby="back-heading">
 					<h2 id="back-heading">Referenced from</h2>
@@ -111,8 +99,7 @@ templ DocPage(v DocView) {
 			}
 
 			<footer class="doc-foot">
-				<p>Status <span class={ ConfidenceClass(v.Doc.Confidence) }>{ v.Doc.Confidence }</span> — { ConfidenceNote(v.Doc.Confidence) }</p>
-				<p>Last verified { v.Doc.LastVerified } · id <code>{ v.Doc.ID }</code> · { v.Doc.Path }</p>
+				<p>Last verified { v.Doc.LastVerified } · <code>content/{ v.Doc.Path }</code></p>
 			</footer>
 		</article>
 	}
@@ -246,9 +233,3 @@ func evidenceRows(links []LinkView) []EvidenceRow {
 	return rows
 }
 
-func subHeading(level int) string {
-	if level == 1 {
-		return "Drill-downs in this area"
-	}
-	return "Artefacts behind this page"
-}