ToolRobin updates

Added 16 everyday tools for text, data formats, image watermarks and colors, UUIDs, checksums, random selection and ZIP files. Inputs are processed in your browser, with instructions in ten languages.

Completed practical steps, settings references, examples and troubleshooting for all 65 tools in ten interface languages.

Added step-by-step instructions, settings advice, worked examples and troubleshooting in eight languages for ten tools, including PDF merging, image compression and QR code generation.

Published ten interface languages; retired URLs permanently redirect to the corresponding English pages. Subtitle translation and recognition options are preserved.

Added HEIC conversion, password generation, image format conversion and SVG optimization, with input processing in the browser.

Corrected Chinese favicon SVG fallback wording and the size-table label, keeping PDF font-size labels separate.