Fog of war reveals the ground around the bot through rock (t17)

Also: board rule to write tasks from chat in our own words, task
descriptions rewritten that way, and a note on lost web-board descriptions.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

tasks/t16.md

@@ -20,7 +20,7 @@ report: |
 
 ## Context
 
-- (owner's answers, 2026-10-24) What bothers you about the vacuum now? "Too many modes". Direction: "F opens a vacuum menu (Recommended)": F with the vacuum opens a dialog like the wall menu: one tile per material with Pick up and Blow toggles. The ⬇/⬆ buttons leave the bag rows. Pick-up modes shrink to two: Everything, or Only marked.
+- The vacuum still has too many modes. Replace them with a menu on F, like the wall menu, where each material has a Pick up and a Blow toggle. Take the ⬇/⬆ buttons off the bag rows. Pick-up has only two states: everything when nothing is marked, or only the marked materials.
 
 ## Subtasks
 
@@ -29,7 +29,7 @@ report: |
 - [x] Text, tests and screenshots up
 - [x] shift to blow all
   report: Shift + right click (while not flying) blows an even mix of everything loose in the bag; bars are left out. What you've chosen to blow doesn't change.
-- [x] Ctrl+click bag items to select several for vac and blow (owner, in chat)
+- [x] Ctrl+click bag items to select several for pick-up and blow
   report: Ctrl+click a bag name adds it to (or takes it out of) what you blow; Ctrl+right-click does the same for pick-up. Plain click still blows only that one.
-- [x] Compact the F menu: one line per item (owner, in chat)
+- [x] Compact the F menu: one line per item
   report: One row per material: swatch, name, count, a ⬇ and a ⬆ button under Pick up / Blow headings.