docs(browser): the arguments for the page bar, the totals and the delegation

Self-review findings, applied.

The word `Total` is now spelled twice — `src/ui/grid.rs` and
`web/shell.js::gridPlan` — which fails design-principles §5's own test: would a
third front end write this again? Yes. It is kept local on the `indicator()`
precedent (the collapse glyph is spelled in both ends while the FACT is shared)
rather than built into a protocol string table for one word, and it is now
NAMED as debt at both the call site and in `context/code/clients.md` instead of
being left for the next reader to find.

`frameCostOf` now counts the totals strip, and that is a change to a rule
`context/code/clients.md` already states — so the section says why the strip is
reserved where the inline group rows deliberately are not: it is present
exactly once, never interleaved with data, so counting it is neither the
feedback loop nor the ratchet that argument rules out. The page bar needs no
rule at all, being outside the box `extentOf` measures.

The evidence file claimed three injections into `dispatch.test.js` that had not
been run. They have been now, and the claim is rewritten to match what actually
failed rather than what was planned — the third was `navigable: true`
unconditionally, not the `position !== ""` reading the text described.
`doctrine(an_injected_fault_must_be_the_fault_you_named)` applies to the
description as much as to the fault.

Injections run and read, all against the served copy or the source:
  gridPlan takes the table row index    -> both round-trip tests fail
  whole() drops its empty-string guard  -> both "means nothing" tests fail
  navigable: true                       -> the Filter test alone fails
  grid bound to `click`                 -> 4 Playwright tests fail, including
                                           the pre-existing improvise-0x9u guard
  paintPages never called               -> the page bar assertion fails
  the tfoot block never runs            -> the totals assertion fails
  page_coords deleted from render_model -> the Rust page-bar test fails
  totals_strip returns Vec::new()       -> the Rust totals test fails, and the
                                           new cache-parity guard reports it
  PageAxis::cycle replaced by items.is_some() -> the cycle index test fails

Two residuals named rather than discovered later: the `Total` spelling above,
and the page bar being display-only — clicking an entry does nothing, because
composing a page change from a click needs a `click_page` on the wasm surface
that does not exist.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01FC2jVn8Au7E9JPkw6bwXXH

web/shell.js

@@ -135,6 +135,8 @@ export function gridPlan(model) {
       ? null
       : {
           span: cornerSpan,
+          // The SECOND spelling of this word — `src/ui/grid.rs` has the other.
+          // Named as debt rather than shared: context/code/clients.md.
           label: "Total",
           cells: model.totals.map((cell) => ({
             text: cell.text,