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)

content/about/about-narrative.md

@@ -49,7 +49,7 @@ The honest framing is in the evidence notes and is repeated here: *full-time par
 
 ## What next
 
-The same three areas at a larger scale: AI and agentic systems, the platform engineering underneath them, and the constrained devices at the edge. Melbourne based and flexible about location and format — remote, hybrid, office, or travel.
+The same three areas at a larger scale: [AI and agentic systems](../ai/ai-systems.md), the [platform engineering underneath them](../platform/platform-estate.md), and the [constrained devices at the edge](../edge/edge-fleet.md). Melbourne based and flexible about location and format — remote, hybrid, office, or travel.
 
 ## Contact policy
 
@@ -60,16 +60,3 @@ This site publishes no address, no phone number and no family details. Contact i
 - **No computer science degree.** The trade is a longer, broader practical education; the pages on this site are the argument, not the certificate.
 - **A period of self-employment is described as such.** It is not dressed up as a sabbatical or as consulting.
 - **Interests are one honest sentence each.** The previous version of this site invented venues and results. That has been deleted rather than corrected in place.
-
-## Drill-downs
-
-- [Non-IT working history](l3/about-non-it-work.md) — level 3
-- [Education](l3/about-education.md) — level 3
-- [Interests — one honest line each](l3/about-interests.md) — level 3
-- [The AI estate](../ai/ai-systems.md) — level 2
-- [The platform estate](../platform/platform-estate.md) — level 2
-- [The edge fleet](../edge/edge-fleet.md) — level 2
-
-## Period and confidence
-
-`period: 1999–`. Confidence is `running`: this is the current self-description, verified against the evidence notes on 2026-10-26.