fix(web/ui): correct project card layout and unify config section actions

- Fix .project-card flex direction so expanded repos align left
- Add .config-section-actions for consistent save bars
- Replace sticky footer in Config Profiles with config-section-actions
- Replace dialog-actions in Tool Type editor with config-section-actions
- Convert manifest editor preview block to .config-section

apps/web/src/components/features/config-profiles/ConfigProfileEditorPanel.tsx

@@ -294,7 +294,7 @@ export const ConfigProfileEditorPanel = ({
               <GitMountEditor mounts={formData.git_mounts || []} onChange={(git_mounts) => onFormChange("git_mounts", git_mounts)} />
             </section>
 
-            <div className="dialog-actions sticky-footer">
+            <div className="config-section-actions">
               <button type="submit" disabled={saveStatus === "saving"} className="btn btn-primary">
                 <Icon name={isCreating ? "add" : "save"} size="sm" />
                 {saveStatus === "saving" ? "Saving..." : isCreating ? "Create Profile" : "Save Changes"}