fix(#1064): edge-swipe nav drawer (Option A, wide-only) (#1184)

Red commit: a810b1fac5 (CI run pending —
draft PR)

Fixes #1064 (parent epic #1052).

## What
Edge-swipe nav drawer (slide-over from left). Pointer-down within left
20px → drag-follows-finger animation → settles open/closed on velocity
threshold. Drawer surfaces the same long-tail routes as the More sheet
(PR #1174) as an alternate entry point at the EDGE.

## Decisions
**Option A — drawer wide-only (>768px).** At ≤768px the bottom-nav has
the More tab (PR #1174); a left-edge drawer there would compete with
that UX. Wide viewports have no More tab, so the drawer replaces the
top-nav hamburger as a faster keyboard-free entry. Bottom-nav
coexistence at narrow widths: none — drawer is disabled.

**Singleton + cleanup.** Module-scoped guard +
`__navDrawerPointerBindCount` debug seam — same pattern as #1180 fix.
`pointermove`/`pointerup` are bound on `document` exactly once across
SPA mounts.

**`body { touch-action: pan-y }`.** Vertical scroll preserved
everywhere; the drawer claims horizontal swipes only inside our
viewport. iOS browser-back left-edge gesture still works (it's the OS,
not the page).

**Accessibility.** `inert` on the drawer when closed, removed when open.
Focus trap (Tab cycles last↔first). Esc closes. Backdrop tap closes.
`prefers-reduced-motion`: instant snap, no animation.

## Tests (TDD)
Red commit pushes the E2E first; CI must FAIL on assertion.
E2E assertion added: `test-nav-drawer-1064-e2e.js:1`

## CSS coordination with #1062
Additions are fenced (`/* === Issue #1064 — Edge-swipe nav drawer === */
… /* === end #1064 === */`) to minimize merge friction.

---------

Co-authored-by: corescope-bot <bot@corescope>
Co-authored-by: openclaw-bot <bot@openclaw>
Co-authored-by: OpenClaw Bot <bot@openclaw.local>
Co-authored-by: corescope-bot <bot@corescope.local>

.github/workflows/deploy.yml

@@ -250,6 +250,7 @@ jobs:
           CHROMIUM_REQUIRE=1 BASE_URL=http://localhost:13581 node test-issue-1109-hamburger-dropdown-visible-e2e.js 2>&1 | tee -a e2e-output.txt
           CHROMIUM_REQUIRE=1 BASE_URL=http://localhost:13581 node test-live-layout-1178-1179-e2e.js 2>&1 | tee -a e2e-output.txt
           CHROMIUM_REQUIRE=1 BASE_URL=http://localhost:13581 node test-live-mql-leak-1180-e2e.js 2>&1 | tee -a e2e-output.txt
+          CHROMIUM_REQUIRE=1 BASE_URL=http://localhost:13581 node test-nav-drawer-1064-e2e.js 2>&1 | tee -a e2e-output.txt
 
       - name: Collect frontend coverage (parallel)
         if: success() && github.event_name == 'push'