feat(core): linked doc visiblity setting and new sidebar layout (#12836)

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit

- **New Features**
- Added a setting to control the visibility of linked document
structures in the sidebar, enabled by default.
- Introduced a "dense" mode for workspace selectors and cards, providing
a more compact display.

- **Improvements**
- Refined sidebar and navigation panel layouts with updated padding,
spacing, and avatar/button sizing for a cleaner and more consistent
appearance.
- Enhanced sidebar appearance settings UI, including new localization
for the linked doc visibility option.
- Updated color theming and spacing in sidebar menu items and quick
search input for better usability.
- Enabled collapsible behavior control for navigation panel tree nodes,
improving user interaction flexibility.

- **Style**
- Adjusted various component styles for improved compactness and
alignment across the sidebar and navigation panels.
- Reduced sizes and padding of buttons and icons for a tidier interface.
- Updated CSS variables and dynamic sizing for workspace cards to
support dense mode.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

packages/frontend/i18n/src/i18n-completenesses.json

@@ -14,7 +14,7 @@
   "it-IT": 100,
   "it": 1,
   "ja": 100,
-  "ko": 54,
+  "ko": 53,
   "pl": 100,
   "pt-BR": 100,
   "ru": 100,

packages/frontend/i18n/src/i18n.gen.ts

@@ -1003,6 +1003,14 @@ export function useAFFiNEI18N(): {
       * `Translucent UI on the sidebar`
       */
     ["com.affine.appearanceSettings.translucentUI.title"](): string;
+    /**
+      * `Show linked doc in sidebar`
+      */
+    ["com.affine.appearanceSettings.showLinkedDocInSidebar.title"](): string;
+    /**
+      * `Control whether to show the structure of linked docs in the sidebar.`
+      */
+    ["com.affine.appearanceSettings.showLinkedDocInSidebar.description"](): string;
     /**
       * `Your current email is {{email}}. We'll send a temporary verification link to this email.`
       */

packages/frontend/i18n/src/resources/en.json

@@ -240,6 +240,8 @@
   "com.affine.appearanceSettings.title": "Appearance settings",
   "com.affine.appearanceSettings.translucentUI.description": "Use transparency effect on the sidebar.",
   "com.affine.appearanceSettings.translucentUI.title": "Translucent UI on the sidebar",
+  "com.affine.appearanceSettings.showLinkedDocInSidebar.title": "Show linked doc in sidebar",
+  "com.affine.appearanceSettings.showLinkedDocInSidebar.description": "Control whether to show the structure of linked docs in the sidebar.",
   "com.affine.auth.change.email.message": "Your current email is {{email}}. We'll send a temporary verification link to this email.",
   "com.affine.auth.change.email.page.subtitle": "Please enter your new email address below. We will send a verification link to this email address to complete the process.",
   "com.affine.auth.change.email.page.success.subtitle": "Congratulations! You have successfully updated the email address associated with your AFFiNE Cloud account.",