Update README and integrate Bootstrap Icons for improved styling. Replace local icon shim with vendored Bootstrap Icons and add font files for better offline support.

README.md

@@ -393,7 +393,8 @@ your-everyday-tools/
 │       └── hash_generator.html
 └── static/
     ├── css/style.css               # All styles, no framework
-    ├── css/icons.css               # Local icon shim; no CDN required
+    ├── css/icons.css               # Vendored Bootstrap Icons; no CDN required
+    ├── fonts/bootstrap-icons.woff2 # Bootstrap Icons font files
     └── js/main.js                  # File upload, AJAX, sidebar, shared logic
 ```
 
@@ -402,7 +403,7 @@ your-everyday-tools/
 - **One universal template** — `upload_tool.html` powers all 25+ server-side tools. Each route passes title, description, accepted file types, and form options as template variables. No per-tool template duplication.
 - **Client-side tools** (text utilities, calculators, security tools) run entirely in the browser with vanilla JavaScript — zero server round-trips.
 - **Local-first processing** — pure browser tools never leave the page; server routes process files locally. Some engines such as LibreOffice, FFmpeg, ODA, and pdf2docx use isolated temporary directories when their CLI/library workflow requires files.
-- **No CSS framework or CDN dependency** — custom CSS with CSS Grid, Flexbox, CSS custom properties, and a local icon shim.
+- **No CSS framework or CDN dependency** — custom CSS with CSS Grid, Flexbox, CSS custom properties, and vendored Bootstrap Icons.
 - **Graceful degradation** — optional packages and external binaries (`LibreOffice`, `FFmpeg`, `ffprobe`, `Tesseract`, ODA File Converter, `rembg`, `pyzbar`, `pdf2docx`, `pdfplumber`, `pytesseract`, `pillow-heif`, Whisper, etc.) are reported through `/capabilities` and tool-page status banners. Missing high-fidelity engines either show a clear unavailable state or require explicit basic fallback consent.
 
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