feat(offline): full offline mode — cache sync, write queue, startup recovery

- Full-screen network error overlay (z-index 300000, above screensaver)
- 'Continue offline' button after 3s, auto-enter after 8s
- Inventory + settings synced to localStorage at startup (during health check)
- inventory_summary and stats computed from local cache while offline
- Write queue (add/use/update/delete): optimistic UI + sync on reconnect
- Pending ops survive page refresh — detected and re-synced at next startup
- Buffered remoteLog/reportError flushed to server (GitHub issues) on restore
- AI/network sections hidden in offline mode (CSS body.offline-mode)
- Banner: pulsing dot while loading cache, item count when ready
- Broken external images replaced with grey SVG placeholder
- Fix: opened items marked is_edible:true offline (was flooding banner)
- Fix: _semverGt() prevents update badge for older GitHub releases
- Bump version to v1.7.25

CHANGELOG.md

@@ -11,15 +11,20 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 - **Recipe scraps tips** — During cooking steps, detect "waste" generated (peels, cores, bones, eggshells, coffee grounds, citrus zest, etc.) and surface AI-powered tips on how to reuse them (compost, natural cleaner, broth, candied peel, etc.). Could be shown as an optional collapsible hint card below the step that generates the scrap.
 
-## [1.7.25] - 2026-05-23
-
-### Fixed
-- **Bring! items re-appearing after manual purchase removal** — `removeBringItem` and `confirmShoppingItemFound` now call `_markBringPurchased` immediately after removing an item, so the purchased blocklist is populated before the next background refresh. `autoAddCriticalItems` now also respects the blocklist for depleted items (quantity = 0), preventing re-addition of just-bought products.
-- **Barcode lookup false "not found"** — Added `_offFetchProduct()` PHP helper that tries up to three barcode candidates (given code, UPC-A → EAN-13 by prepending `0`, EAN-13 → UPC-A by stripping leading `0`) against two Open Food Facts locales (`it` and default), with one automatic retry on network error. UPCItemDB fallback also iterates the same candidates. Reduces false negatives on 12-digit US barcodes and region-specific EAN codes.
-- **Partial throw from expired-items banner** — The "Butta" button in the dashboard banner previously discarded the entire inventory row with no confirmation. It now opens the existing throw modal (location picker + quantity input + "Butta tutto" option), consistent with the throw flow available from the scan → action page.
+## [1.7.25] - 2026-05-25
 
 ### Added
-- **Related stock display when scanning branded products** — When scanning a product, the action page now shows a green card listing any inventory items from the same generic family (matching first name token or shopping name, different product ID) already at home, so you avoid double-buying.
+- **Home Assistant integration** — Full bidirectional HA support: inventory sensor (`sensor.evershelf_*`) exposes item counts, expiring items, shopping total, opened items and next-expiry info. Webhooks fire on inventory changes (add/use/shopping). Daily cron alert notifies via HA for items expiring within the configured threshold. TTS announces cooking steps through HA Media Player. New Settings tab 🏠 with connection test, TTS preset (Piper, Google, Nabu Casa), webhook config, and YAML snippet for `configuration.yaml`. Resolves [#111](https://github.com/dadaloop82/EverShelf/issues/111).
+- **Offline mode** — Full offline-first support. Full-screen overlay on network loss; "Continue offline" button after 3 s, auto-enter after 8 s. Inventory and settings are synced to `localStorage` at startup and cached on every successful API call. Writes (add/use/update/delete) are queued and synced on reconnect with optimistic UI updates. Pending operations survive page refresh and are re-synced automatically at next startup. AI/network-dependent sections (anti-waste chart, nutrition analysis, recipe generator, price fetching, Gemini chat) are hidden in offline mode. `remoteLog` and `reportError` are buffered offline and flushed on restore. Broken external images replaced with a grey placeholder.
+- **Offline-computed dashboard** — While offline, `inventory_summary` and `stats` (expiring/expired/opened) are derived client-side from the local cache so all dashboard stat cards and expiry alerts show accurate data.
+
+### Fixed
+- **Offline banner flood** — Opened items in the offline `stats` response lacked `is_edible`; `!undefined` evaluated to `true`, causing every opened item to be shown as "not edible" in the dashboard banner. Field is now set to `true` (client-side shelf-life check already handles genuinely expired items).
+- **Version update badge showing older versions** — `_checkWebappUpdate` used `latestTag !== _loadedVersion` (inequality only), so running a newer dev build triggered an "update available" badge for an older GitHub release. Now uses `_semverGt(latest, current)` so only genuinely newer releases trigger the badge.
+- **Bring! items re-appearing after manual purchase removal** — `removeBringItem` and `confirmShoppingItemFound` now call `_markBringPurchased` immediately, and `autoAddCriticalItems` respects the blocklist for depleted items.
+- **Barcode lookup false "not found"** — New `_offFetchProduct()` tries three barcode candidates (given, UPC-A↔EAN-13 conversion) across two Open Food Facts locales with auto-retry.
+- **Partial throw from expired-items banner** — "Butta" now opens the throw modal (qty + location) instead of silently deleting the entire inventory row.
+- **Related stock display when scanning branded products** — When scanning a product, the action page now shows a green card listing any inventory items from the same generic family already at home.
 
 ## [1.7.24] - 2026-05-21