Campaigns

• Eastern Invasion
  • Many minor bugfixes

• Heir to the Throne
  • Fix S17 to ensure the starting castle always has 6 hexes for recruiting (PR #8314)
  • Clarify S11's objectives by editing the map (no string changes) (PR #8326)
  • Add decorations and map embellishments to S16, S19a and S22 (PR #8243)
  • Use swamp terrain instead of sand for S19b (PR #8243)

• Under the Burning Suns
  • Improve continuity between events that can be triggered in various orders.
  • Adjust Fighter unit line for easier early leveling and more late game staying power.

• World Conquest
  • Fix the Bezoar artifact (issue #6513)

Multiplayer

• Assume that all players need a copy of an add-on, by defaulting `require_modification`/`require_campaign` to `yes` (PR #8135)

Lua API

• Added documentation for linting and IDE support

Packaging

• Add CMake and SCons options to use an already installed copy of Lua 5.4 (PR #8234)
  • The system copy of Lua must be compiled as C++ rather than C, as Wesnoth uses C++ exceptions.
  • Windows requires a compile-time change to Lua, so must use the in-tree Lua submodule.

Translations

• New translation: Bengali
• Updated translations: Arabic, British English, Czech, Finnish, French

Units

• War Harbinger: +3 HP (29 -> 32), XP to 100, cost +2g (41 -> 43), removed forest and village dodge modifiers
• Dark Omen: removed forest and village dodge modifiers
• Raven: removed forest and village dodge modifiers

User interface

• New multiline textbox and numerical spinner widgets (PR #8199)

WML Engine

• Added a composite hero/leader ellipse, in case an author forgets to `UNMAKE_HERO` when converting to a leader (PR #8375)
• `[event]name=unit_placed` is now non-undoable by default (issue #7780)
• `[scroll]` now includes a delay, this was needed for visual effects such as the `QUAKE` macro

Miscellaneous and Bug Fixes

• Fix some logs not being included in the logfile (issue #8108)
• Multiple fixes to handling of Lua errors, some of which could cause a crash (PR #8234)
• When WML specifies a unit or unit types gender, automatically include that in the .po files as a translation hint
• Make sure `transform_unit` doesn't heal the unit when removing objects (PR #8147)
• Fixed bugs in the rushers recruit AI (issue #8297)
• Savefiles now include the ID of the core in use