mod: Phase 1 - bring forward mod-exclusive files with ActivityManager migration

Brings ~55 mod-exclusive files to the upstream-based mod/master-resync branch:

Activities (migrated to new ActivityManager pattern):
- Clock/Time: SetTimeActivity, SetTimezoneOffsetActivity, NtpSyncActivity
- Dictionary: DictionaryDefinitionActivity, DictionarySuggestionsActivity,
  DictionaryWordSelectActivity, LookedUpWordsActivity
- Bookmark: EpubReaderBookmarkSelectionActivity
- Book management: BookManageMenuActivity, EndOfBookMenuActivity
- OPDS: OpdsServerListActivity, OpdsSettingsActivity
- Utility: DirectoryPickerActivity, NumericStepperActivity

Utilities (unchanged):
- BookManager, BookSettings, BookmarkStore, BootNtpSync
- Dictionary, LookupHistory, TimeSync, OpdsServerStore

Libraries: PlaceholderCover, TableData, ChapterXPathIndexer
Scripts: inject_mod_version, generate_book_icon, preview_placeholder_cover
Docs: KOReader sync XPath mapping

Migration changes:
- ActivityWithSubactivity -> Activity base class
- Callback constructors -> finish()/setResult() pattern
- enterNewActivity() -> startActivityForResult()
- Activity::RenderLock&& -> RenderLock&&

These files won't compile yet - they reference mod settings and I18n
strings that will be added in subsequent phases.

Made-with: Cursor

chat-summaries/2026-03-02_12-00-summary.md

@@ -0,0 +1,46 @@
+# OPDS Server Reordering
+
+## Task
+Add the ability to reorder OPDS servers via a `sortOrder` field, editable on-device and with up/down buttons in the web UI.
+
+## Changes Made
+
+### Data Model (`src/OpdsServerStore.h`)
+- Added `int sortOrder = 0` field to `OpdsServer` struct
+
+### Store Logic (`src/OpdsServerStore.cpp`)
+- `saveToFile()`: persists `sort_order` to JSON
+- `loadFromFile()`: reads `sort_order`, assigns sequential defaults to servers missing it, sorts after load
+- `migrateFromSettings()`: assigns `sortOrder = 1` to migrated server
+- `addServer()`: auto-assigns `sortOrder = max(existing) + 1` when left at 0
+- `updateServer()`: re-sorts after update
+- Added `sortServers()` private helper: sorts by sortOrder ascending, ties broken case-insensitively by name (falling back to URL)
+- Added `moveServer(index, direction)`: swaps sortOrder with adjacent server, re-sorts, saves
+
+### On-Device UI (`src/activities/settings/OpdsSettingsActivity.cpp`)
+- Added "Position" as first menu item (index 0), shifting all others by 1
+- Uses `NumericStepperActivity` (new) for position editing: numeric stepper with Up/Down and PageForward/PageBack to increment/decrement
+- `saveServer()` now re-locates the server by name+url after sort to keep `serverIndex` valid
+
+### NumericStepperActivity (new: `src/activities/util/NumericStepperActivity.{h,cpp}`)
+- Reusable numeric stepper modeled after `SetTimezoneOffsetActivity`
+- Displays value with highlight rect and up/down arrow indicators
+- Up/PageForward increment, Down/PageBack decrement (clamped to min/max)
+- Confirm saves, Back cancels
+- Side button hints show +/-
+
+### Web API (`src/network/CrossPointWebServer.{h,cpp}`)
+- `GET /api/opds`: now includes `sortOrder` in response
+- `POST /api/opds`: preserves `downloadPath` and `sortOrder` on update
+- New `POST /api/opds/reorder`: accepts `{index, direction: "up"|"down"}`, calls `moveServer()`
+
+### Web UI (`src/network/html/SettingsPage.html`)
+- Added up/down arrow buttons to each OPDS server card (hidden at boundaries)
+- Added `reorderOpdsServer()` JS function calling the new API endpoint
+
+### i18n
+- Added `STR_POSITION` to all 9 translation YAML files
+- Regenerated `I18nKeys.h`, `I18nStrings.h`, `I18nStrings.cpp`
+
+## Follow-up Items
+- None identified; build passes cleanly.