Fix VFS rmdir, prefix/launch issues, add version + beta channel

- VFS: add mo2_rmdir + OverwriteManager::removeDirectory so Wrye Bash
  shutil.rmtree stops failing with WinError 267 (issue #47).
- FileRenamer: case-insensitive fallback via new resolvePathCaseInsensitive
  walks each path component; bulk hide in Conflict tab no longer dies with
  a misleading "Input/output error" when DirectoryEntry normalised parent
  dir case (issue #54). formatSystemMessage stops aliasing Windows error
  code 5 to errno 5 (EIO).
- Versioning: FLUORINE_VERSION_* + fluorine_build_info.h generated from
  CMake; Linux createVersionInfo returns Fluorine's version. About dialog
  shows Fluorine version + MO2 engine + commit. Beta builds stamp
  "<semver>B<yyyymmddhhmm>" (issue #51).
- CI: ci.yml determines channel from ref (v* tags = stable, main = beta),
  publishes a rolling `beta` GitHub release whose body carries a
  machine-parseable fluorine-meta block (timestamp, commit) for the
  in-app updater.
- Updater: new FluorineUpdater polls GitHub API on startup, compares
  against embedded metadata, notifies on new release without auto-install.
  Channel toggle piggybacks on the existing "beta versions" checkbox.
- Bethesda plugins: determineMyGamesPath no longer creates
  Documents/My Games/<GameName> for every possible title at plugin load;
  only games with a detected install path get their dirs created
  (issue #55).
- Starfield: dataDirectory() on Linux now points at <game>/Data instead
  of My Games/Starfield/Data so the single FUSE mount lands where SFSE
  loads plugins; My Games Data becomes a secondary symlinked mapping
  (issue #56).
- Prefix resolution: prefer Fluorine config, then explicit
  fluorine/prefix_path, then legacy Settings/* keys (with a warning) so
  auto-detected Heroic/Bottles prefixes can't silently override a user-
  configured Fluorine prefix (issue #52). compatDataPathFromPrefix no
  longer hands Proton the wrong parent dir for plain wine prefixes.
- xrandr: ensureXrandrInstalled back-fills the helper for existing SLR
  installs, prefix init runs it before wineboot, SLR wrap exposes
  xrandr-bin via --filesystem= and prepends PATH inside the container
  (issue #49).
- Process tracking: drop the wineserver-as-last-resort fallback that made
  MO2 hang on Proton's session manager after game exit. Rescan the prefix
  for matching game executables instead (covers reparented launcher
  children like f4se_loader → Fallout4.exe). Unlock button now kills
  wineserver for the prefix (SIGTERM then SIGKILL on timeout).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

1 files changed, 42 insertions, 0 deletions

diff --git a/CHANGELOG.md b/CHANGELOG.md
new file mode 100644
index 0000000..b92e886
--- /dev/null
+++ b/CHANGELOG.md
@@ -0,0 +1,42 @@
+# Fluorine Manager — Changelog
+
+All notable user-facing changes to Fluorine Manager land here. Versioning
+follows SemVer (MAJOR.MINOR.PATCH). Two distribution channels:
+
+- **stable** — tagged `v*` releases. Each tag cuts a normal GitHub release.
+- **beta** — rolling release under the `beta` tag. Every push to `main` that
+  builds successfully replaces the assets on that one release — no new tag
+  per build. Beta builds embed a `B<timestamp>` suffix in their version
+  string (e.g. `0.1.4B202604231800`) and a commit hash, so the in-app
+  updater can tell whether the build you're running already matches the
+  current rolling release.
+
+## [Unreleased]
+
+### Added
+- In-app self-update checker with channel toggle (stable / beta) in
+  Settings → General. Runs on startup (when "Check for updates" is on) and
+  surfaces new releases without auto-installing.
+- Fluorine version is now distinct from the embedded MO2 engine version.
+  About dialog shows `Fluorine Manager <version>` with the MO2 engine
+  version and build commit on the revision line.
+- CI publishes a rolling `beta` GitHub release on each push to `main`,
+  including a machine-parseable `fluorine-meta` block (timestamp, commit)
+  that the updater reads to detect matching builds.
+- FUSE VFS now handles `rmdir`, unblocking tools like Wrye Bash that tear
+  down temp directories inside the virtual Data folder.
+
+### Fixed
+- Bulk hide from Conflict tab (#54) no longer fails with a misleading
+  "Input/output error" when the DirectoryEntry tree has lowercased a
+  parent directory. `FileRenamer` now resolves case mismatches against the
+  real filesystem before giving up, and the rename path surfaces the
+  actual errno text instead of conflating the Windows error code 5 with
+  errno 5 (EIO).
+- Wrye Bash `NotADirectoryError: [WinError 267]` during Data-folder
+  initialization (#47). Rooted in the missing FUSE `rmdir` op.
+
+## [0.1.3]
+
+- First versioned Fluorine Manager release (baseline pre-CHANGELOG).
+  See git history for earlier work.