chore(release): changelog and what's-new entry for v2026.10.3 — the climbing release

[marceld23]

Release prep for v2026.10.3 "the climbing release".

What

• CHANGELOG.md: new [2026.10.3] section (player-facing, grouped by theme) and the compare-link block moved on ([Unreleased] → v2026.10.3...HEAD).
• data/whatsnew.json: re-exported with tools/devblog/export_whatsnew.py. The DE + EN release post for 2026.10.3 is now the top entry (67 posts).
• TODO.md: the four entries since v2026.10.2 are marked as released in v2026.10.3.

Content since v2026.10.2

• feat(movement): wall climbing on planets, moons and asteroids — grab, felt grip, pull-up, climbing gear (#2195) #2198: wall climbing on planets, moons and asteroids (Epic: wall climbing on planets, moons and asteroids — grab, grip, pull-up, climbing gear, climb animation #2195: Wall climbing: grab a wall, climb in four directions, let go #2188–Wall climbing: user manual, Codex, first-time hint and texts in all 14 languages #2194)
• feat(trees): walk through tree crowns like through plants — leaves, needles and fronds, not the trunks (#2184) #2197: walk through tree crowns, trunks stay solid (Walk through tree foliage like through plants (leaves, needles, fronds — not trunks) #2184)
• fix(webgl): the browser menu before the game data — no ghost images, singleplayer waits for the data, compressed download (#2185 #2186 #2187) #2196: the browser menu before the game data (Browser: shell screens leave ghost images before the game data has loaded — no camera clears the screen #2185 Browser singleplayer / New world started before the game data has loaded fails with "could not be started in this browser" #2186 C:/Program Files/Git/play serves 20 MB of game data uncompressed — enable Caddy compression on the WorldHost site #2187)
• fix(locales): Codex texts hold in-game information only — no credit lines, the Rainbow Planet's islands float on the sea (#2182) #2183: Codex texts hold in-game information only (Codex texts: in-game information only — drop the credit sentences, fix the Rainbow Planet's floating islands #2182)

Protocol stays 8, terrain generation stays 20.

After merge

• Tag v2026.10.3 on the merge commit.
• Fleet roll: server pin 2026.10.3, and worldhost redeploy on sha-2aabadf. Shared changed, and the redeploy also brings the Caddy compression from C:/Program Files/Git/play serves 20 MB of game data uncompressed — enable Caddy compression on the WorldHost site #2187 live.
• /play refresh, glitch.fun check, devblog publish.

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