feat(frontend): add dedicated /cli page, nav links, and CTA buttons; remove CLI modals for leaner UX

- New CLI page at /cli with detailed usage and improved Quick Start card header
- Add CLI link to navbars and small ‘Try the CLI’ CTAs on Home & Templates
- Remove CLI modals and unused showCliModal() handler (keep_small_simple)
- Self-host Bootstrap and Font Awesome; add OSI logo and GPL notice in footers
- Dockerfile: verify vendor assets exist at build time
- Minor a11y/contrast and heading-order cleanups (100 a11y)

backend/app/main.py

@@ -11,6 +11,7 @@ from typing import Any, Dict, List, Optional
 
 from fastapi import FastAPI, File, HTTPException, Request, UploadFile  # type: ignore
 from fastapi.middleware.cors import CORSMiddleware  # type: ignore
+from fastapi.middleware.gzip import GZipMiddleware  # type: ignore
 from fastapi.responses import FileResponse, HTMLResponse  # type: ignore
 from fastapi.staticfiles import StaticFiles  # type: ignore
 from fastapi.templating import Jinja2Templates  # type: ignore
@@ -38,6 +39,9 @@ app.add_middleware(
     allow_headers=["*"],
 )
 
+# Add GZip compression
+app.add_middleware(GZipMiddleware, minimum_size=500)
+
 # Setup templates and static files
 BASE_DIR = Path(__file__).resolve().parent.parent.parent
 TEMPLATES_DIR = BASE_DIR / settings.templates_dir
@@ -155,6 +159,14 @@ async def templates_page(request: Request):
     context.update(settings.get_template_context())
     return templates.TemplateResponse("templates.html", context)
 
+# CLI Info Page
+@app.get("/cli", response_class=HTMLResponse)
+async def cli_page(request: Request):
+    """Serve the CLI information page."""
+    context = {"request": request}
+    context.update(settings.get_template_context())
+    return templates.TemplateResponse("cli.html", context)
+
 
 # API Routes
 @app.post("/api/validate", response_model=ValidationResult)