fix(layout): add top/bottom margin to container in scrolled mode, closes #3463 (#3504)

* fix(layout): add top/bottom margin to container in scrolled mode, closes #3463

When showMarginsOnScroll is enabled, the paginator margins are set to 0
but the FoliateViewer container had no compensating padding, causing
header/footer bars to overlap content. Now the container padding aligns
content top to the bottom of the header bar (gridInsets.top + 44px) and
content bottom to the top of the footer bar (52px + safe area padding).
Also fixes the footer bar height constant from 44 to 52 to match
ProgressBar's actual h-[52px].

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* chore(ci): cache all crates including local path deps in Tauri build

Add cache-all-crates: 'true' to Swatinem/rust-cache so that vendored
local path dependencies (packages/tauri/crates/, packages/tauri-plugins/)
are cached between CI runs instead of being recompiled from scratch.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

---------

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

.github/workflows/pull-request.yml

@@ -123,6 +123,7 @@ jobs:
       - uses: Swatinem/rust-cache@v2
         with:
           key: tauri-cargo
+          cache-all-crates: 'true'
 
       - name: install system dependencies
         run: |