[neeerp]

HeavenClient now handles the two packets the exploration medals (#701) send. Row 198 follow-up; RE in v83ref reports/a050.

• SCRIPT_PROGRESS_MESSAGE (0x7A) — UIScriptMessage over FloatingLines: v83's five floating lines (FUN_00a13f20, FUN_006ce251). Gold #FFC600 Arial bold 15 with a black edge, centred, at y = 150, 130, … 70. Each is shown for 3 s, then fades over 3 more. A line takes the first slot that was never used or was shown more than 3 s ago; with all five busy, it is dropped. Empty strings are ignored.
• QUEST_CLEAR (0x31) — UIQuestComplete::add_notice(id): the existing "Quest Complete!" card (FUN_00a26d44, type 7).
  • Notices now stay while QuestLog::is_started(id), rather than only while the quest is in the catalog. The explorer quests aren't in supported_quests.txt, so their card vanished on the next frame.
  • Names come from QuestInfo.img/<id>/name.
• Quest text — #R<quest># is filled in with that quest's record, so Beginner Explorer reads "Status : 20 / 20 Completed" instead of "27010 / 20".

Verification:

• ctest 151/151 in build-dbg, including the new floating_lines test.
• GUI check on a private Xvfb display: Lanea (level 30) with 19 Victoria places seeded logs in at Florina Beach. The gold line appears and fades, and the Quest Complete! "Beginner Explorer" card shows. Pressing O on the card opens the quest log, which shows "20 / 20".
• Sonnet review a054 found no bugs. Its low findings are fixed: plain text, the strict 3 s, the lines stay on top, edges fade faster, and the CMake entry.

Known approximation: v83 fades the outlined line as one layer. Here the edges are drawn separately, at the square of the opacity.