feat(notes): add Notability WebDAV ingest pipeline

modules/_ai-tools/skills/notability-normalize/SKILL.md

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+---
+name: notability-normalize
+description: Normalizes an exact Notability transcription into clean, searchable Markdown while preserving all original content and uncertainty markers. Use after a faithful transcription pass.
+---
+
+# Notability Normalize
+
+You are doing a **Markdown normalization** pass on a previously transcribed Notability note.
+
+## Rules
+
+- Do **not** summarize.
+- Do **not** remove uncertainty markers such as `[unclear: ...]`.
+- Preserve all substantive content from the transcription.
+- Clean up only formatting and Markdown structure.
+- Reconstruct natural reading order when the transcription contains obvious OCR or layout artifacts.
+- Collapse accidental hard line breaks inside a sentence or short phrase.
+- If isolated words clearly form a single sentence or phrase, merge them into normal prose.
+- Prefer readable Markdown headings, lists, and tables.
+- Keep content in the same overall order as the transcription.
+- Do not invent content.
+- Do not output code fences.
+- Output Markdown only.
+
+## Output
+
+- Produce a clean Markdown document.
+- Include a top-level `#` heading if the note clearly has a title.
+- Use standard Markdown lists and checkboxes.
+- Represent tables as Markdown tables when practical.
+- Use ordinary paragraphs for prose instead of preserving one-word-per-line OCR output.
+- Keep short bracketed annotations when they are required to preserve meaning.
+
+## Important
+
+The source PDF remains the ground truth. When in doubt, preserve ambiguity instead of cleaning it away.

modules/_ai-tools/skills/notability-transcribe/SKILL.md

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+---
+name: notability-transcribe
+description: Faithfully transcribes handwritten or mixed handwritten/typed Notability note pages into Markdown without summarizing. Use when converting note page images or PDFs into an exact textual transcription.
+---
+
+# Notability Transcribe
+
+You are doing a **faithful transcription** pass for handwritten Notability notes.
+
+## Rules
+
+- Preserve the original order of content.
+- Reconstruct the intended reading order from the page layout.
+- Read the page in the order a human would: top-to-bottom and left-to-right, while respecting obvious grouping.
+- Do **not** summarize, explain, clean up, or reorganize beyond what is necessary to transcribe faithfully.
+- Preserve headings, bullets, numbered items, checkboxes, tables, separators, callouts, and obvious layout structure.
+- Do **not** preserve accidental OCR-style hard line breaks when the note is clearly continuous prose or a single phrase.
+- If words are staggered on the page but clearly belong to the same sentence, combine them into normal lines.
+- If text is uncertain, keep the uncertainty inline as `[unclear: ...]`.
+- If a word is partially legible, include the best reading and uncertainty marker.
+- If there is a drawing or diagram that cannot be represented exactly, describe it minimally in brackets, for example `[diagram: arrow from A to B]`.
+- Preserve language exactly as written.
+- Do not invent missing words.
+- Do not output code fences.
+- Output Markdown only.
+
+## Output shape
+
+- Use headings when headings are clearly present.
+- Use `- [ ]` or `- [x]` for checkboxes when visible.
+- Use bullet lists for bullet lists.
+- Use normal paragraphs or single-line phrases for continuous prose instead of one word per line.
+- Keep side notes in the position that best preserves reading order.
+- Insert blank lines between major sections.
+
+## Safety
+
+If a page is partly unreadable, still transcribe everything you can and mark uncertain content with `[unclear: ...]`.