# Q-Edit v0.7.1 — Pagination UX & State Persistence

**Date:** 2025-08-24

This release focuses on making very large result sets (hundreds to thousands of pages) pleasant to navigate. We replaced the full page-number list with a compact, windowed pager; added a jump-to-page control; preserved your place via URL hash; and made the page count preference persistent.

## Highlights

- **Windowed + Ellipsis Pagination**
  - Only shows a small window around the current page: _first/prev, current±2, next/last_, with `…` for gaps.
  - Prevents the pagination bar from stretching the page horizontally.
- **Jump to page**
  - Number input + **Go** button; **Enter** key supported.
- **URL hash deep-linking**
  - The current page is reflected as `#page=NN`. Browser back/forward & reload restore state.
- **Default items per page = 25**
  - Persisted in `localStorage` under the key **`qedit_itemsPerPage`**.
- **Overflow guard**
  - `.pagination-controls` is now constrained with `max-width:100%; overflow-x:auto; white-space:nowrap;`.

## Technical changes

- **Files modified**
  - `index.html`
    - Default items-per-page option switched to **25** (`<option value="25" selected>`).
  - `style.css`
    - Added overflow guard for `.pagination-controls`.
    - New styles for `.jump-to-page` controls.
  - `script.js`
    - Replaced `buildPaginationControls()` with windowed/ellipsis logic and jump UI.
    - Expanded `addPaginationEventHandlers()` to wire **jump button** and **Enter** on the number input.
    - New helpers:
      - `getPageFromHash()` — parse `#page=NN`.
      - `setPageHash(p)` — update hash on navigation.
      - `initPaginationPrefs()` — apply `localStorage` items-per-page and hash page on startup; listens for `hashchange`.
    - Persist selection on items-per-page change via `localStorage.setItem('qedit_itemsPerPage', ...)`.
    - **Respect existing page** from hash after auth; removed forced `currentPage = 1` in login success path.
    - A11y: `aria-label` on navigation controls; `aria-current="page"` on active page.
    - Defensive: no-op when `totalPages <= 1`.

## Behavior notes

- If `localStorage` is unavailable, items-per-page simply won’t persist (feature degrades gracefully).
- Deep-links like `/#page=17` will open directly on page 17 after authentication completes.
- Both top and bottom pagers render identically from the same HTML string.

## QA checklist

- With large datasets (e.g., 4,000+ items):
  - [ ] No horizontal page-wide scrolling due to pagination.
  - [ ] Pager shows compact numbers with `…` where appropriate.
  - [ ] Clicking **First/Prev/Next/Last** updates content and hash.
  - [ ] Typing a page number and pressing **Go** or **Enter** navigates correctly and clamps to 1..N.
  - [ ] Reload preserves page via `#page=NN`.
  - [ ] Changing items-per-page updates `#page` to 1 and persists across reloads.
- A11y:
  - [ ] `aria-current="page"` present on current page link.
  - [ ] Focus rings visible; buttons keyboard-activatable.

## Potential regressions / mitigations

- **Hash collisions**: If other features later use the hash, ensure `page=` remains compatible or parse jointly.
- **Bookmark drift**: When items-per-page changes, page resets to 1 by design; the hash updates accordingly.

## Future work (optional)

- Keyboard nav shortcuts (←/→) to flip pages when the pager is focused.
- Gradient edge hints on the pager to signal scrollable overflow.
- Virtualized/infinite scroll mode for image-heavy views.