release: reconcile main ancestry with unchanged 0.6.0 source - #437

* docs(roadmap): refresh video and Milestone 16 status

- Mark video metadata, thumbnails/scrubbing, the Lightbox player and
  duration/FPS facets as delivered; keep resolution, container-codec and
  motion-score facets open.
- Record Milestone 16 as 2 of 3 complete: Flux/SD3.5 and Civitai shipped in
  v0.5.0, while the ComfyUI workflow visualizer remains.
- Add light/dark roadmap status SVG overviews to README and ROADMAP.
- Refresh the README What's New section, supported formats and video support.
- Correct the HelpGuide text to list only implemented video search facets.

* docs(i18n): sync translated READMEs with v0.5.0 roadmap

Update the Simplified Chinese, Traditional Chinese and Japanese READMEs
with the v0.5.0 What's New section, Flux.1 / SD3.5 parser row, AVIF/WebM
formats, video support, Civitai feature text and the SVG roadmap chart.
Retain the upload-only and planned bidirectional-sync wording covered by
the documentation regression tests.

* docs(visuals): add SVG architecture and refresh UI mockups

- Replace the README and docs/ARCHITECTURE.md ASCII diagrams with light/dark
  SVG architecture maps covering the Vue frontend, Tauri IPC, app shell, six
  omera-* crates and external services.
- Redraw the main studio preview for v0.5.0 with Flux/SD3.5 inspector fields,
  dual text encoders, video cards and the current sidebar.
- Add a Model Manager screenshot showing Civitai lookups, cached previews and
  update badges.
- Keep all artwork synthetic and illustrative; no user library media is used.
- Refresh the website preview copies to match the README.

* docs: reconcile roadmap, downloads and feature documentation

- Correct every README download table to the actual versioned Windows,
  macOS ARM64 and Linux assets; remove the nonexistent portable ZIP and
  Intel macOS entries.
- Record image transformation as implemented in API_CONTRACTS and the
  roadmap, and update the roadmap SVG counts (13 complete, 3 planned).
- Replace translated README ASCII architecture diagrams with the SVG map
  and add the Model Manager screenshot in all languages.
- Expand the architecture crate table with omera-tagger and omera-clip,
  and refresh crate/frontend descriptions.
- Update RELEASING.md for v0.5.0, stale crate paths and schema version.
- Mark historical planning/validation documents clearly.
- Add a documentation index and remove unused preview assets.
- Add Flux.1 / SD3.5 and direct Civitai coverage to the wiki in all seven
  languages.

* docs(help): align in-app help with current video and Civitai flows

Update the Model Manager/LoRA topic to describe cached Civitai previews,
version update badges and trained-word merge, and refresh the video topic
with hover scrubbing, duration/FPS facets and the current badge. The help
content remains English-only; full locale extraction is a separate task.

* feat(i18n): localize the in-app help guide

Move the 11 help topics and drawer UI strings into a locale-aware
content module with English, Simplified Chinese, Traditional Chinese,
Japanese, German, French and Spanish translations. The drawer now
follows the active locale for titles, search, no-results, shortcuts,
tips, footer and close labels.

Refresh the English help content for Civitai previews/update badges and
video hover scrubbing/duration-FPS facets, and add a parity test that
ensures every locale exposes the same topics with non-empty content.

* docs(site): publish v0.5.0 features and platform corrections

- Add Flux.1 / SD3.5 and direct Civitai feature cards with translations in
  all seven site locales.
- Remove unsupported Intel macOS download entry and ARM64 claims for the
  current Windows/Linux release matrix; Intel Macs show an Apple Silicon
  requirement.
- Correct cloud sync to upload-only mirroring and storage to the current
  SQLite runtime with a future-backend abstraction.
- Add omera-tagger to the architecture list.

* docs: reconcile roadmap and validation status with current state

Mark review issues #98-#117 complete (all twenty are closed) and record the
resolution of PR #138 and the #393-#400 stack. Replace the stale "not
validated / not complete" list with per-item current status, keeping native
installation, real-media and installed-update gates open in #256.

* fix(updater): launch Windows installers in direct update mode

* fix(updater): download and install Windows updates with one click

* docs(updater): document direct upgrades and validation limits

* chore(release): prepare version 0.5.1

* fix(updater): always show progress during unattended updates

* fix(updater): render release Markdown safely

* feat(updater): localize release notes and publication output

* style(sidebar): unify row rhythm and control targets

* feat(layout): add bounded accessible panel resize control

* feat(layout): integrate persistent sidebar and inspector sizing

* fix(layout): preserve gallery card space while resizing panels

* feat(ui): add shared accessible line icon primitive

* style(ui): unify navigation icons and reading typography

* feat(toolbar): keep display controls accessible at narrow widths

* test(ui): stub decorative icons in localized sidebar fixture

* docs(gui): record responsive toolbar acceptance

* fix(updater): report transfer completion before signature verification

* feat(updater): simplify actions and explain update phases

* feat(tasks): add bounded operation-owned background task state

* feat(tasks): track export and model downloads beyond dialog lifetime

* feat(tasks): show bounded task history in the activity panel

* feat(tasks): include verified update downloads in activity history

* fix(tasks): snapshot the selected asset before async task execution

* docs(gui): record task lifecycle and acceptance evidence

* fix(tasks): tolerate unavailable thumbnail diagnostic counters

* fix(toolbar): preserve disclosure state during same-mode layout changes

* chore(release): synchronize version manifests at 0.5.2

* docs(release): add seven-language 0.5.2 release notes