diff --git a/Dockerfile b/Dockerfile
index 06a45a2..5b53c0e 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -16,6 +16,11 @@ RUN npm install --omit=dev --no-audit --no-fund
 # App source
 COPY server/ ./
 
+# Pre-deploy guard: FAIL the build if any inline <script> in the served HTML pages has a JS syntax error. A
+# broken inline script takes down the whole page (one missing brace in home.html once caused an app-wide login
+# outage). This turns that into a failed build instead of a production incident. See tools/check-syntax.js.
+RUN node tools/check-syntax.js
+
 # Served HTTP port (NPM terminates TLS and proxies here). The DB is Postgres (DATABASE_URL, set via .env);
 # the /data volume holds uploads / recordings / transcripts / downloads (see docker-compose.yml).
 ENV PORT=8090
diff --git a/TECHSTACK.md b/TECHSTACK.md
index 45515cf..6c2c1ab 100644
--- a/TECHSTACK.md
+++ b/TECHSTACK.md
@@ -1,6 +1,6 @@
 # Tech Stack — BizGaze Connect
 
-> Living document. **Last updated: 2026-11-03** (rev 4). Update this file whenever a dependency, platform, service, or
+> Living document. **Last updated: 2026-11-03** (rev 5). Update this file whenever a dependency, platform, service, or
 > tool is added/removed/version-bumped. See [Maintaining this file](#maintaining-this-file) and the
 > [Changelog](#changelog) at the bottom.
 
@@ -203,6 +203,11 @@ Bump the **Last updated** date at the top and add a line to the Changelog below.
 
 ## Changelog
 
+- **2026-11-03 (rev 5)** — Reliability: Postgres pool safety timeouts (`connectionTimeoutMillis`,
+  `statement_timeout`, `idle_in_transaction_session_timeout`, max 10→20) so a saturated pool fails fast instead
+  of hanging forever; and a **pre-deploy HTML syntax guard** (`server/tools/check-syntax.js`) run in the Docker
+  build and `redeploy.sh` — a JS syntax error in an inline `<script>` now fails the build instead of reaching
+  production (it had caused an app-wide login hang).
 - **2026-11-03 (rev 4)** — Android native call **video** (Increment 2b): `CallVideo` renders camera/screen tiles
   with LiveKit `TextureViewRenderer` hole-punched behind a transparent WebView; `CallMedia` gains camera
   publish/flip + track lookup; new `ANDROID_NATIVE_VIDEO` server flag. Also fixed the white meeting background
diff --git a/redeploy.sh b/redeploy.sh
index 3774471..3698ee4 100755
--- a/redeploy.sh
+++ b/redeploy.sh
@@ -39,5 +39,14 @@ if [ -z "$PW" ]; then
   read -rsp "Server password for $USER@$HOST: " PW; echo
 fi
 
+# Pre-flight: catch inline-<script> syntax errors in the served HTML BEFORE triggering a remote build (fast
+# local feedback — the Docker build runs the same check authoritatively and would fail anyway). A syntax error
+# in a big inline script breaks the whole page (it once caused an app-wide login outage). Skipped if node isn't
+# on PATH. Checks the local tree, which matches origin/master once you've pushed.
+if command -v node >/dev/null 2>&1; then
+  echo "==> Checking HTML inline-script syntax …"
+  node "$DIR/server/tools/check-syntax.js" || { echo "ERROR: HTML syntax check failed — fix before deploying (the build would fail too)."; exit 1; }
+fi
+
 echo "==> Triggering deploy on $USER@$HOST ($APPDIR) …"
 exec "$PLINK" -ssh -batch -hostkey "$HOSTKEY" -P "$PORT" -pw "$PW" "$USER@$HOST" "cd $APPDIR && bash deploy.sh $*"
diff --git a/server/tools/check-syntax.js b/server/tools/check-syntax.js
new file mode 100644
index 0000000..b2ad59e
--- /dev/null
+++ b/server/tools/check-syntax.js
@@ -0,0 +1,58 @@
+#!/usr/bin/env node
+// Pre-deploy syntax guard for the served HTML pages.
+//
+// WHY: our pages carry large INLINE <script> blocks. A single JavaScript syntax error in one block makes the
+// WHOLE block fail to parse — every function/handler it defines becomes undefined. That is exactly what caused
+// an app-wide login outage (home.html's `callConnected` listener was missing one `}`: the boot code never ran,
+// so after login the splash spun forever). The browser catches it instantly; our deploy did not. This script
+// turns that class of bug into a FAILED BUILD (exit 1) instead of a production outage.
+//
+// It parses — but never executes — every inline <script> in server/public/*.html with Node's `vm`, so it only
+// checks SYNTAX (browser globals like `document` are irrelevant to parsing). Runs in the Docker build (see
+// Dockerfile, right after `COPY server/ ./`) and locally from redeploy.sh for fast feedback.
+const fs = require('fs');
+const path = require('path');
+const vm = require('vm');
+
+const dir = path.join(__dirname, '..', 'public');
+let files;
+try {
+  files = fs.readdirSync(dir).filter((f) => f.toLowerCase().endsWith('.html'));
+} catch (e) {
+  console.error('[check-syntax] cannot read ' + dir + ': ' + e.message);
+  process.exit(1);
+}
+
+// Inline <script> … </script> (skip ones with a src= attribute — those are external files, nothing inline).
+const re = /<script\b([^>]*)>([\s\S]*?)<\/script\s*>/gi;
+let errors = 0;
+let blocks = 0;
+
+for (const f of files) {
+  const html = fs.readFileSync(path.join(dir, f), 'utf8');
+  re.lastIndex = 0;
+  let m;
+  while ((m = re.exec(html))) {
+    if (/\bsrc\s*=/i.test(m[1] || '')) continue; // external script
+    blocks++;
+    const code = m[2];
+    // File line where this block's body starts, so the reported line is file-relative (not block-relative).
+    const openTagEnd = m.index + m[0].indexOf('>') + 1;
+    const startLine = html.slice(0, openTagEnd).split('\n').length - 1; // 0-indexed offset
+    try {
+      new vm.Script(code, { filename: f, lineOffset: startLine });
+    } catch (e) {
+      errors++;
+      const loc = (String(e.stack || '').split('\n')[0] || '').trim(); // e.g. "home.html:4398"
+      console.error('[check-syntax] ' + f + ' — ' + (e.message || 'syntax error') +
+        (loc && /:\d+$/.test(loc) ? ('  @ ' + loc) : ('  (inline <script> near line ' + (startLine + 1) + ')')));
+    }
+  }
+}
+
+if (errors) {
+  console.error('[check-syntax] FAILED: ' + errors + ' inline <script> block(s) with syntax errors. Aborting deploy.');
+  process.exit(1);
+}
+console.log('[check-syntax] OK: ' + blocks + ' inline <script> block(s) parsed across ' + files.length + ' HTML file(s).');
+process.exit(0);