[rangaNP]

Summary

Make the browser chrome more transparent and apply the saved appearance before a window first becomes visible. Cold launches previously showed an opaque gray window before the restored Space theme appeared.

Changes

• Reduce the shared chrome overlays and use thin native material for the unthemed command bar and tab switcher. Keep the existing accessibility and transparency-setting fallbacks.
• Apply the saved light/dark appearance before scene creation, then reveal each window after its restored content and native backdrop have laid out. Disable the initial appearance animation while preserving later transitions.
• Give folder icons taller front panels and recenter their symbols, preserving sidebar row sizes and opening animations.
• Set MARKETING_VERSION to 0.1.7.
• Add the current browser screenshot to the README, stored under Branding/Screenshots outside the app resources.

Testing

On macOS 27.2 with Xcode 27.2:

• swift test --no-parallel: all 923 package tests passed (429 Core, 231 WebKit, 263 application).
• Debug xcodebuild build-for-testing and Release xcodebuild build: succeeded; both app bundles report version 0.1.7.
• Windowless startup regressions cover saved light/dark appearance, layout readiness, cancellation, window attachment, and visible/auto-hidden sidebar controls. The appearance regression fails with the previous reset behavior and passes with the fix.
• Checked before/after folder artwork in open/closed states and light/dark appearances using offscreen SwiftUI renders.
• Native UI tests were compiled only; execution remains on CI.
• git diff --check and README image references passed.

Screenshots or recording

Checklist

• I reviewed the diff and kept the changes focused on this PR.
• I described the validation performed and any remaining limitations.
• I understand the changes and can explain them and address maintainer questions in review comments.