fix: second-wave bug fixes, security hardening, visual polish, UX improvements

Bug fixes:
- SRV-B1 through B5: server config, router, server_info, syscheck corrections
- BA-03 through BA-06: builder path and universal build cleanup (BLD-D1 through D3)
- Frontend WS race condition and useVisibleInterval hook fixed
- Drive-root path bug in PathForge resolved
- Upload error handling improved

Security:
- PathForge path traversal guard added
- Script injection escaping applied throughout

Visual (DV-01 through DV-15):
- Cyan design tokens and page headers standardised
- Dead CSS removed from Pages.css, PathTracerPage.css, wealth-deck.css
- SacredPageHeader deleted (replaced inline); sidebar version display fixed

UX:
- Emberwake request storm fixed (EmberwakePage.tsx)
- Help blurbs UH-01, UH-02, UH-06 added
- HelpTips wired into Crucible, Fleet (FleetGroupsStrip, FleetToolbar), Settings

Build:
- vite.config.ts: webroot auto-sync on build
- build_universal.go: universal build artifact cleanup
- PROBLEMS.md tracking updated

server/web/src/pages/BuilderPage.tsx

@@ -929,7 +929,7 @@ export default function BuilderPage() {
         <header className="deck-hero">
           <div className="deck-hero-text">
             <p className="deck-eyebrow font-tech">INSTALLER FORGE</p>
-            <h1>The Forge</h1>
+            <h1>Forge</h1>
           </div>
         </header>
         <NeonCard accent="brass"><p>Loading forge defaults from server...</p></NeonCard>
@@ -943,7 +943,7 @@ export default function BuilderPage() {
         <header className="deck-hero">
           <div className="deck-hero-text">
             <p className="deck-eyebrow font-tech">INSTALLER FORGE</p>
-            <h1>The Forge</h1>
+            <h1>Forge</h1>
           </div>
         </header>
         <NeonCard accent="brass">
@@ -1013,7 +1013,7 @@ export default function BuilderPage() {
       <header className="deck-hero">
         <div className="deck-hero-text">
           <p className="deck-eyebrow font-tech">INSTALLER FORGE</p>
-          <h1>The Forge</h1>
+          <h1>Forge</h1>
           <p className="page-subtitle">
             {simpleMode
               ? 'Simple mode: name the worker, confirm wallet + LAN URL, forge. Recommended defaults handle stealth, idle mining, and persistence.'