chore(scripts): port build-with-ad4m-link.sh from Flux

The companion Flux PR already uses scripts/build-with-ad4m-link.sh for
the cross-repo build workflow — CI / reviewers set BRANCH (or rely on
auto-detected CI env vars) and the script clones the matching ad4m
branch, builds core + connect, rewrites pnpm.overrides to file:./ad4m/*,
and rebuilds the consumer.

This is the exact same script, adapted for WE:
  - GitHub PR resolution URL points at coasys/we (was coasys/flux).
  - Drops the ad4m-hooks helpers / react / vue build + override steps —
    WE only consumes @coasys/ad4m and @coasys/ad4m-connect.
  - find -name 'dist' walks apps/ and packages/ instead of views/ and
    packages/ (matches WE's layout).
  - Vite cache clear is scoped to the WE tree (excludes ./ad4m/* so we
    don't nuke the linked ad4m checkout's own cache).
  - Heap bump to --max-old-space-size=8192 (WE's build hits OOM at
    4096 on this workspace; see daily memory note).

Usage (mirrors Flux):
  BRANCH=feat/query-abort scripts/build-with-ad4m-link.sh

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

Author: HexaField

scripts/build-with-ad4m-link.sh

@@ -0,0 +1,72 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+# Detect branch (Netlify sets BRANCH / HEAD; GitHub Actions uses GITHUB_HEAD_REF / GITHUB_REF)
+BRANCH="${BRANCH:-${HEAD:-${GITHUB_HEAD_REF:-${GITHUB_REF#refs/heads/}}}}"
+
+# For Netlify deploy previews, branch is set to "pull/N/head" instead of the actual branch name
+# Resolve the real branch name via the GitHub API
+if echo "$BRANCH" | grep -qE '^pull/[0-9]+/head$'; then
+  PR_NUM=$(echo "$BRANCH" | sed 's|pull/\([0-9]*\)/head|\1|')
+  echo "==> PR deploy preview detected (PR #$PR_NUM), resolving branch name..."
+  REAL_BRANCH=$(curl -sf "https://api.github.com/repos/coasys/we/pulls/$PR_NUM" | python3 -c "import sys,json; print(json.load(sys.stdin)['head']['ref'])" 2>/dev/null || true)
+  if [ -n "$REAL_BRANCH" ]; then
+    BRANCH="$REAL_BRANCH"
+  fi
+fi
+
+echo "==> Detected branch: $BRANCH"
+
+# Resolve which AD4M branch to clone: matching branch if available, otherwise dev.
+# Published @coasys/ad4m-* packages have broken workspace: refs and dev's package.json
+# pins @coasys/ad4m to link:../ad4m/core, so a local ad4m clone is always required.
+if git ls-remote --exit-code --heads \
+  https://github.com/coasys/ad4m.git "$BRANCH" >/dev/null 2>&1; then
+  AD4M_BRANCH="$BRANCH"
+  echo "==> Found matching AD4M branch '$BRANCH'"
+else
+  AD4M_BRANCH="dev"
+  echo "==> No matching AD4M branch — falling back to 'dev'"
+fi
+
+echo "==> Cloning AD4M branch '$AD4M_BRANCH'"
+rm -rf ad4m
+git clone --depth 1 --single-branch --branch "$AD4M_BRANCH" \
+  https://github.com/coasys/ad4m.git ad4m
+
+# Pin pnpm to v9 for AD4M build (ad4m uses object-format workspace overrides which pnpm v10 rejects)
+npm i -g pnpm@9.15.0 2>/dev/null || true
+
+cd ad4m
+pnpm install --no-frozen-lockfile
+
+echo "==> Building @coasys/ad4m (core)"
+cd core && pnpm exec tsc && pnpm run bundle && cd ..
+
+echo "==> Building @coasys/ad4m-connect"
+cd connect && pnpm run build && cd ..
+
+cd ..
+echo "==> AD4M packages built"
+
+echo "==> Overriding @coasys packages with local builds"
+node -e "
+  const pkg = require('./package.json');
+  pkg.pnpm = pkg.pnpm || {};
+  pkg.pnpm.overrides = pkg.pnpm.overrides || {};
+  pkg.pnpm.overrides['@coasys/ad4m'] = 'file:./ad4m/core';
+  pkg.pnpm.overrides['@coasys/ad4m-connect'] = 'file:./ad4m/connect';
+  require('fs').writeFileSync('./package.json', JSON.stringify(pkg, null, 2) + '\n');
+"
+
+pnpm install --no-frozen-lockfile
+
+# Clear ALL build caches AND pre-built dist bundles so everything rebuilds with the linked SDK
+rm -rf .turbo node_modules/.cache
+find . -name '.turbo' -type d -not -path './ad4m/*' -not -path './node_modules/*' -exec rm -rf {} + 2>/dev/null || true
+find . -name '.vite' -type d -path '*/node_modules/.vite' -not -path './ad4m/*' -exec rm -rf {} + 2>/dev/null || true
+find packages -name 'dist' -type d -exec rm -rf {} + 2>/dev/null || true
+find apps -name 'dist' -type d -exec rm -rf {} + 2>/dev/null || true
+echo "==> All caches + dist directories cleared"
+
+NODE_OPTIONS='--max-old-space-size=8192' pnpm build