clean-pasted-text

Fix text that was pasted from a PDF, Word doc, webpage, email, or chat and arrived broken. Repairs smart quotes and curly apostrophes, removes non-breaking spaces and zero-width characters, fixes mid-word line breaks and hyphenation from PDF column wraps, normalizes bullets and dashes, collapses double spaces after periods, strips invisible Unicode trash, and rebuilds paragraph structure when newlines were lost or doubled. Use when the user says the text "looks weird," "won't format right," "has