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/view.go

@@ -124,18 +124,16 @@ type (
 
 	// DocView is an L1, L2 or L3 content page.
 	DocView struct {
-		Layout     LayoutView
-		Doc        *content.Document
-		AreaTitle  string
-		Role       string
-		Body       templ.Component
-		Metrics    []MetricView
-		Tech       []string
-		Evidence   []LinkView
-		Backlinks  []LinkView
-		SubPages   []LinkView
-		Timeline   []TimelineItem
-		LevelLabel string
+		Layout    LayoutView
+		Doc       *content.Document
+		Role      string
+		Body      templ.Component
+		Metrics   []MetricView
+		Tech      []string
+		Evidence  []LinkView
+		Backlinks []LinkView
+		SubPages  []LinkView
+		Timeline  []TimelineItem
 	}
 
 	// EvidenceView is the index of every artefact.
@@ -197,33 +195,3 @@ func ConfidenceClass(c string) string {
 	}
 	return "conf"
 }
-
-// ConfidenceNote is the sentence shown under a status badge.
-func ConfidenceNote(c string) string {
-	switch c {
-	case content.ConfidenceDelivered:
-		return "Delivered."
-	case content.ConfidenceRunning:
-		return "Running today."
-	case content.ConfidenceInProgress:
-		return "In progress — not finished."
-	case content.ConfidenceAbandoned:
-		return "Abandoned. Kept in the record deliberately."
-	case content.ConfidenceHistoric:
-		return "Historic — worked on, not maintained today."
-	}
-	return ""
-}
-
-// LevelLabel names a depth level for the page kicker.
-func LevelLabel(level int) string {
-	switch level {
-	case 1:
-		return "Level 1 · capability in one screen"
-	case 2:
-		return "Level 2 · what is actually run"
-	case 3:
-		return "Level 3 · artefact"
-	}
-	return ""
-}