Rename movement/world methods to idiomatic Go; remove all gotos

Refactor step 4. Renames (C breadcrumbs kept in doc comments):
doMove→moveHero, beTrapped→springTrap, rndmove→randomStep,
doRooms→digRooms, doPassages→digPassages, doMaze→digMaze,
chgStr→changeStrength, doRun→startRun, moveStuff→finishMove,
turnref→turnRefresh, moveMonst→moveMonster, doChase→chaseStep,
setOldch→setOldChar, cansee→canSee, roomin→roomIn, runto→runTo,
conn→connectRooms, putpass→putPassage, passnum→numberPassages,
numpass→numberPassage, rndPos→randomPos, rndRoom→randomRoom,
treasRoom→treasureRoom, accntMaze→accountMaze.

All goto/label flows are gone: moveHero uses a retry loop with the
PASSGO corner logic extracted into passageTurn; dispatch re-dispatches
via a loop; chaseStep re-checks via a loop; saveGame uses a labeled
prompt loop. Control flow and RNG call order are unchanged; suite
green.

TODO.md

@@ -29,14 +29,26 @@ Refactor ground rules:
 
 # Next Step
 
-Refactor step 4: method renames, movement/world subsystem
-(doMove→moveHero, beTrapped→springTrap, rndmove→randomStep,
-doRooms/doPassages/doMaze→digRooms/digPassages/digMaze,
-chgStr→changeStrength, ...); remove the goto/label flows in doMove,
-dispatch, and saveGame in favor of loops and helpers.
+Refactor step 5: method renames, items/combat/UI subsystems
+(invName→inventoryName, rollEm→rollAttacks, doPot→applyPotionFuse,
+getItem→promptPackItem returning (obj, ok), getDir→promptDirection);
+int status codes (attack returning -1) become named results. Two or
+three commits, one subsystem each.
 
 # Completed Steps
 
+- 2026-07-07 Refactor step 4 (refactor/movement-renames): movement/world
+  renames (doMove→moveHero, beTrapped→springTrap, rndmove→randomStep,
+  doRooms/doPassages/doMaze→digRooms/digPassages/digMaze,
+  chgStr→changeStrength, doRun→startRun, moveStuff→finishMove,
+  turnref→turnRefresh, moveMonst→moveMonster, doChase→chaseStep,
+  setOldch→setOldChar, cansee→canSee, roomin→roomIn, runto→runTo,
+  conn→connectRooms, putpass→putPassage, passnum→numberPassages,
+  numpass→numberPassage, rndPos→randomPos, rndRoom→randomRoom,
+  treasRoom→treasureRoom, accntMaze→accountMaze); all goto/label flows
+  replaced with loops (moveHero retry loop + extracted passageTurn,
+  dispatch re-dispatch loop, chaseStep passage loop, saveGame labeled
+  prompt loop); C breadcrumbs kept in doc comments.
 - 2026-07-07 Lint adoption finished (refactor/no-package-globals): all
   37 package-level vars moved into `gameData` (built by `newGameData`,
   hung on RogueGame as `g.data`, set in NewGame and Restore); ObjectKind
@@ -98,41 +110,36 @@ dispatch, and saveGame in favor of loops and helpers.
 
 # Future Steps
 
-1. Refactor step 5: method renames, items/combat/UI subsystems
-   (invName→inventoryName, rollEm→rollAttacks, doPot→applyPotionFuse,
-   getItem→promptPackItem returning (obj, ok), getDir→promptDirection);
-   int status codes (attack returning -1) become named results. Two or
-   three commits, one subsystem each.
-2. Refactor step 6: extract types from the god object — MessageLine
+1. Refactor step 6: extract types from the god object — MessageLine
    owns the msg/addmsg/endmsg machinery; pack/inventory operations move
    onto *Player; monster/object list management and map queries
    consolidate onto *Level; RogueGame keeps turn orchestration and
    cross-system effects only.
-3. Refactor step 7: effects dispatch — the giant quaff/readScroll/doZap
+2. Refactor step 7: effects dispatch — the giant quaff/readScroll/doZap
    switches become per-kind handler tables of small named methods,
    keeping effect order and RNG call sequence identical. This step also
    clears the outstanding cyclop/gocognit/nestif lint findings.
-4. Refactor step 8: constructor and style pass per the house
+3. Refactor step 8: constructor and style pass per the house
    styleguide — game.New(game.Params{...}) replacing NewGame(Config);
    replace the gameEnd panic unwind with error-based turn results where
    feasible; 77-column wrap sweep.
-5. Docs refresh: update ARCHITECTURE.md Part 2 and README.md for the
+4. Docs refresh: update ARCHITECTURE.md Part 2 and README.md for the
    post-refactor names; add the C name → Go name rename table.
-6. Playtest hardening pass: play several full games with the tcell
+5. Playtest hardening pass: play several full games with the tcell
    binary and extend run_test.go to script a deeper multi-level
    playthrough (descend past level 5, use potions, scrolls, zapping,
    save/restore). Fix any panics, message mismatches, or divergences
    from the C behavior that this uncovers, with regression tests.
-7. Verify the seed-compatibility claim against the C reference on
+6. Verify the seed-compatibility claim against the C reference on
    c-master: same seed, same dungeon, same item tables, for several
    seeds.
-8. Broaden unit test coverage where playtesting finds thin spots
+7. Broaden unit test coverage where playtesting finds thin spots
    (rings, sticks, wizard commands).
-9. Tag a release once a full game (Amulet retrieval and score entry)
+8. Tag a release once a full game (Amulet retrieval and score entry)
    completes without defects.
-10. Full-terminal-size support (deferred by explicit decision
-    2026-07-06): per-game dungeon dimensions instead of the 80x24
-    constants; open design questions are resize policy, gameplay
-    tuning at larger sizes, and a --classic 80x24 mode.
-11. Note: this repo is exempt from the standard policy scaffold. Do not
+9. Full-terminal-size support (deferred by explicit decision
+   2026-07-06): per-game dungeon dimensions instead of the 80x24
+   constants; open design questions are resize policy, gameplay
+   tuning at larger sizes, and a --classic 80x24 mode.
+10. Note: this repo is exempt from the standard policy scaffold. Do not
     add Makefile, Dockerfile, or REPO_POLICIES.md.