0.2.0

Added

• Added modular web localization with packaged locale catalogs, a Settings
  language selector, persisted web.language config, automatic browser/system
  language detection by default, and initial support for English, Simplified
  Chinese, Hindi, Spanish, Arabic, French, Bengali, Portuguese, Russian, Urdu,
  German, and Italian.
• Added a Raspberry Pi USB-OTG image-export hardware test helper and
  Samsung SPF-71E compatibility image generator for validating a
  read-only mass-storage gadget before implementing automated exports.
• Added a disabled-by-default USB OTG image-export setting with device
  controller detection, warning text when the gadget path is unavailable, and
  installer support for USB-OTG helper packages.
• Added reversible USB OTG boot-mode preparation and restore actions for the
  Settings page, backed by a root-scoped helper that edits Raspberry Pi boot
  config with timestamped backups.
• Added automated USB OTG frame-image export for battery overview pages and a
  Fleet Trend chart, including configurable output size, format, light/dark
  appearance, refresh cadence, overview density, and a manual export action.
• Added USB OTG-specific Fleet Trend frame settings for metric selection,
  history range, and included devices, independent of the web UI display
  defaults.
• Switched USB OTG frame image generation to Chromium screenshots of the hidden
  frame-render pages so Diagnostics preview and exported drive images share the
  same renderer.
• Start USB OTG frame-image regeneration in the background after saving USB OTG
  image-export settings when export is enabled, so Settings redirects without
  waiting for screenshots and drive reattachment to finish.
• Added a USB OTG drive refresh action that reattaches the existing backing
  disk image without regenerating frame images.
• Added Settings warnings for aggressive gateway polling intervals below
  300 seconds and for USB OTG exports that run faster than gateway polling,
  plus clearer USB OTG Backing disk image wording.
• Added a Settings action to shut down the Raspberry Pi safely from the web UI,
  plus installer-managed scoped sudo permissions for restart, reboot, and
  shutdown host-control actions.
• Added a dedicated BM300 Pro/BM7 live polling driver, selected from the
  configured device type, with voltage, state-of-charge, temperature, RSSI, and
  device-state support kept separate from the existing BM200/BM6 driver.
• Added commercial device type choices for BM6, BM7, BM300, BM300 Pro, BM900,
  and BM900 Pro while keeping them mapped to the existing isolated driver
  families.
• Added freeform overview colors with a native color picker, while preserving
  the existing color presets for quick selection.

Fixed

• Fixed Raspberry Pi service refreshes so deployments preserve USB OTG Fleet
  Trend metric, range, and device-selection settings instead of dropping them
  from config.toml.
• Fixed USB OTG Battery Overview frame captures so overview cards fit inside
  the exported image and added a latest-sample timestamp to the frame title.
• Tightened USB OTG Fleet Trend frame captures by removing the outer chart
  wrapper gap and expanding the plot to the frame edges.
• Fixed USB OTG Chromium screenshot sizing by compensating for Raspberry Pi
  headless Chromium's outer-window inset before cropping to the configured
  frame dimensions.
• Fixed USB OTG Fleet Trend frame title clipping by giving the compact title
  line enough vertical room and lowering the frame header while retaining
  horizontal ellipsis.
• Constrained the root USB OTG drive helper to safe backing-image and gadget
  name policies, and removed unnecessary Linux capabilities from the web
  service unit.
• Fixed USB OTG settings validation so bad numeric form values return an
  in-page validation error instead of disconnecting the web request.
• Fixed manual USB OTG frame exports so the explicit export action can force a
  one-off image generation even when automatic USB OTG exports are disabled.
• Fixed web-triggered background USB OTG frame exports so saving settings
  reuses the last stored snapshot instead of starting a concurrent polling run.
• Fixed settings-triggered USB OTG frame exports so repeated saves do not start
  concurrent drive-update workers.
• Fixed Settings status text so repeated saves do not claim a new USB OTG frame
  export started while an existing export is already running.
• Fixed BM6-family current-state parsing so device status code 2 displays as
  charging instead of being forced to normal.
• Fixed USB OTG frame device selection so Battery Overview frame images honor
  the selected frame devices instead of only Fleet Trend charts.
• Fixed USB OTG Battery Overview frame layout so three selected devices render
  in one row and larger selections paginate into balanced frame pages.
• Fixed Diagnostics frame preview links so every generated Battery Overview
  frame page is available when selected devices span multiple pages.
• Fixed USB OTG Battery Overview frame status rendering so battery state,
  offline, and error conditions match the Home Battery Overview.
• Fixed bm-gateway run --dry-run --export-usb-otg-now so dry-run mode skips
  USB OTG drive writes instead of forcing an export.
• Fixed USB OTG export scheduling so future-dated export markers are treated as
  stale and exports can resume immediately.
• Fixed USB OTG image-size validation so config values above the helper's
  4096 MB limit are rejected before export.
• Restored and documented USB OTG host-mode restore behavior so BMGateway
  removes any [all] peripheral-mode dwc2 overlay when it owns the boot-mode
  setting.
• Fixed USB OTG Fleet Trend frame latest-value rows for duplicate device names
  by matching values with unique series identifiers.
• Updated the config schema for web.language and the [usb_otg] settings so
  packaged examples, runtime validation, and schema documentation stay aligned.
• Tightened the USB OTG root helper so sudo-launched drive exports copy only
  top-level readable files owned by the original sudo caller.
• Tightened installer privilege setup so --disable-web removes the web action
  sudoers policy instead of leaving passwordless web-service actions installed.
• Fixed device creation from the web UI so saving a new device redirects
  immediately while the first live polling cycle starts in the background.
• Reworked the Home Battery Overview so it uses responsive browser-measured
  pagination with at most two rows, instead of a user-configured visible-card
  limit.
• Refined History and Devices card lists with a clearer Batteries selector,
  responsive selector pagination, larger device badges, and shorter mobile edit
  actions.