configs: drop hardcoded filesystem_size — installer now computes it

mini/full/bare no longer pin filesystem_size; the installer sizes the RedoxFS
image from the actual package set (redox_installer::compute_filesystem_size_mb,
installer fork 89e1c67). Removes the magic numbers (mini 512/2048, full 4096,
bare 192) that had to be hand-tuned as packages changed. Bumps the installer
submodule pointer.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

config/redbear-bare.toml

@@ -20,8 +20,9 @@ include = ["minimal.toml"]
 # 192 MiB leaves ~30% headroom over the 153 MiB of installed content
 # (zsh, base, base-initfs, kernel, relibc, userutils, libgcc, libstdcxx,
 # coreutils, extrautils, ca-certificates, kibi, netdb, netutils, pkgutils,
-# uutils). Anything below 160 MiB triggers ENOSPC during installer commit.
-filesystem_size = 192
+# uutils). filesystem_size is auto-computed by the installer from the package
+# set (see redox_installer::compute_filesystem_size_mb); the computed size
+# includes a free-space margin so it clears the historical ~160 MiB ENOSPC floor.
 
 # Trim down packages beyond what minimal.toml includes.
 # minimal.toml includes ca-certificates, coreutils, extrautils, zsh, pkgutils, kibi.

config/redbear-full.toml

@@ -10,7 +10,8 @@
 include = ["redbear-mini.toml"]
 
 [general]
-filesystem_size = 4096
+# filesystem_size auto-computed by the installer from the package set
+# (see redox_installer::compute_filesystem_size_mb). Set explicitly to override.
 
 # Package groups — meta-package definitions for logical grouping of the
 # desktop stack. The installer resolves all group references before

config/redbear-mini.toml

@@ -10,14 +10,10 @@
 include = ["minimal.toml", "redbear-legacy-base.toml", "redbear-netctl.toml", "redbear-device-services.toml", "redbear-boot-stages.toml"]
 
 [general]
-# The mini package set (base + full driver/daemon set, brush/bash/zsh, coreutils,
-# console net/diagnostic tools, iwlwifi/bluetooth firmware) is ~350 MB *compressed*
-# pkgars; the RedoxFS image holds the uncompressed extraction plus live writable
-# headroom, which overflows a 512 MB image (installer aborts with os error 28,
-# "No space left on device"). The installer does not content-size the filesystem —
-# this value is the literal image size — so it must fit the package set. 2048 MB
-# leaves comfortable headroom for a text-only live/recovery target.
-filesystem_size = 2048
+# filesystem_size is intentionally omitted: the installer computes the RedoxFS
+# image size from the actual package set (per-file block accounting over the
+# transitive package closure + overhead + free margin). Set it explicitly here
+# only to override that computation. See redox_installer::compute_filesystem_size_mb.
 
 [users.messagebus]
 uid = 100