✨ implement zoom-to-mouse in CameraSystem

Replaces plain cam.setZoom() with zoom-to-mouse: after each zoom step
the scroll is corrected by (mouseOffset from center) * (1/zBefore - 1/zAfter),
keeping the world point under the cursor fixed. Also fixes getCenterWorld()
which previously divided by zoom incorrectly. Added JSDoc to all methods.

.claude/settings.local.json

@@ -0,0 +1,35 @@
+{
+  "permissions": {
+    "allow": [
+      "Bash(curl:)",
+      "Bash(curl -s \"https://git.zally.dev/api/v1/repos/tekki/nissefolk/issues/1\" -H \"Authorization: token de54ccf9eadd5950a6ea5fa264b6404acdecc732\")",
+      "Bash(python3 -m json.tool)",
+      "Bash(curl -s \"https://git.zally.dev/api/v1/repos/tekki/nissefolk/issues/1/timeline\" -H \"Authorization: token de54ccf9eadd5950a6ea5fa264b6404acdecc732\")",
+      "Bash(curl:*)",
+      "Bash(python3 -c \":*)",
+      "Bash(git checkout:*)",
+      "Bash(npx tsc:*)",
+      "Bash(npm run:*)",
+      "Bash(/usr/local/bin/npm run:*)",
+      "Bash(/home/tekki/.nvm/versions/node/v24.14.0/bin/npm run:*)",
+      "Bash(export PATH=\"/home/tekki/.nvm/versions/node/v24.14.0/bin:$PATH\")",
+      "Bash(git add:*)",
+      "Bash(git commit:*)",
+      "Bash(git push:*)",
+      "Bash(python3 -c \"import sys,json; d=json.load\\(sys.stdin\\); print\\(d.get\\(''''html_url'''', d.get\\(''''message'''',''''''''\\)\\)\\)\")",
+      "Bash(git pull:*)",
+      "Bash(for id:*)",
+      "Bash(do echo:*)",
+      "Bash(python3 -c \"import sys,json; d=json.load\\(sys.stdin\\); print\\(d.get\\(''''html_url'''',''''''''\\)\\)\")",
+      "Bash(TOKEN=\"de54ccf9eadd5950a6ea5fa264b6404acdecc732\" BASE=\"https://git.zally.dev/api/v1/repos/tekki/nissefolk\" __NEW_LINE_2bc8ebfb809e4939__ for id in 5 6 7 9)",
+      "Bash(TOKEN=\"de54ccf9eadd5950a6ea5fa264b6404acdecc732\")",
+      "Bash(BASE=\"https://git.zally.dev/api/v1/repos/tekki/nissefolk\")",
+      "Bash(__NEW_LINE_5d5fe245d6f316dc__ for:*)",
+      "Bash(do)",
+      "Bash(done)",
+      "Bash(python3 -c \"import sys,json; d=json.load\\(sys.stdin\\); print\\(d.get\\(''''html_url'''',''''''''\\), d.get\\(''''number'''',''''''''\\), d.get\\(''''message'''',''''''''\\)\\)\")",
+      "Bash(git remote:*)",
+      "Bash(python3 -c \"import sys,json; d=json.load\\(sys.stdin\\); print\\(d.get\\(''''login'''',''''''''\\), d.get\\(''''message'''',''''''''\\)\\)\")"
+    ]
+  }
+}

.gitignore

@@ -1,4 +1,2 @@
 node_modules/
 dist/
-game-test.log
-.claude/

CHANGELOG.md

@@ -20,12 +20,8 @@ Format follows [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 - Villagers are now called **Nisse** throughout the UI (panel, controls hint, stockpile display, context menu, spawn message)
 
 ### Added
-- Scroll wheel zooms toward the mouse cursor position (zoom-to-mouse), correctly accounting for Phaser's center-based zoom model
+- Scroll wheel now zooms toward the mouse cursor position instead of the screen center
 - Middle mouse button held: pan the camera by dragging
-- Test environment at `/test.html` with `ZoomTestScene` (Phaser default) and `ZoomMouseScene` (zoom-to-mouse) for camera behaviour analysis; file-logging via Vite middleware to `game-test.log`
-
-### Fixed
-- `getCenterWorld()` in `CameraSystem` returned wrong world coordinates at zoom ≠ 1; corrected from `scrollX + width/(2·zoom)` to `scrollX + width/2`
 - Right-click context menu: suppresses browser default, shows Build and Nisse actions in the game world
 - Initial project setup: Phaser 3 + TypeScript + Vite
 - Core scenes: `BootScene`, `GameScene`, `UIScene`

game-test.log

@@ -0,0 +1,5 @@
+{"t":1774091984264,"event":"snapshot","zoom":1,"scrollX":321,"scrollY":562,"vpScreen":{"w":958,"h":475},"vpWorld":{"w":958,"h":475},"vpTiles":{"w":29.938,"h":14.844},"centerWorld":{"x":800,"y":799.5},"mouse":{"screen":{"x":0,"y":0},"world":{"x":0,"y":0}}}
+{"t":1774091986280,"event":"snapshot","zoom":1,"scrollX":321,"scrollY":562,"vpScreen":{"w":958,"h":475},"vpWorld":{"w":958,"h":475},"vpTiles":{"w":29.938,"h":14.844},"centerWorld":{"x":800,"y":799.5},"mouse":{"screen":{"x":288,"y":400},"world":{"x":609,"y":961.5}}}
+{"t":1774091988280,"event":"snapshot","zoom":1,"scrollX":321,"scrollY":562,"vpScreen":{"w":958,"h":475},"vpWorld":{"w":958,"h":475},"vpTiles":{"w":29.938,"h":14.844},"centerWorld":{"x":800,"y":799.5},"mouse":{"screen":{"x":288,"y":400},"world":{"x":609,"y":961.5}}}
+{"t":1774091990281,"event":"snapshot","zoom":1,"scrollX":321,"scrollY":562,"vpScreen":{"w":958,"h":475},"vpWorld":{"w":958,"h":475},"vpTiles":{"w":29.938,"h":14.844},"centerWorld":{"x":800,"y":799.5},"mouse":{"screen":{"x":288,"y":400},"world":{"x":609,"y":961.5}}}
+{"t":1774091992281,"event":"snapshot","zoom":1,"scrollX":321,"scrollY":562,"vpScreen":{"w":958,"h":475},"vpWorld":{"w":958,"h":475},"vpTiles":{"w":29.938,"h":14.844},"centerWorld":{"x":800,"y":799.5},"mouse":{"screen":{"x":288,"y":400},"world":{"x":609,"y":961.5}}}