[tiensonqin]

Typing > now creates a Quote block, multi-paragraph Quote pastes stay in one block, and Code/Calculator editing has a software-keyboard action for creating a new block. Date editors support direct calendar-date input, including historical dates, and full date references in text properties create or reuse Journal pages.

• Keep shortcut, paste, block creation, reference resolution, and date validation in the shared OCaml core; preserve literal Code/Math text and partial year/month references.
• Flush pending Android editor input before toolbar actions so newly typed text is preserved.
• Synchronize Android calendar selection with typed dates, allow years 1–9999, and use Gregorian labels consistently for historical dates.
• Constrain long graph names so the iPad Settings button remains visible; use the root keyboard layout guide to keep the bottom toolbar independent of floating keyboards.

Related to logseq/db-test#1473.

Validation:

• dune build @shared/native/runtest: 1192 tests passed, including offline restart and synchronization of text-property Journal references.
• iOS Release simulator build and native checks for long graph names, docked/dismissed keyboards, empty/populated search dismissal, search-result editor toolbar, and Code editor presentation.
• Android debug and instrumentation builds; native Calculator return/toolbar input checks and historical date/property checks.

Floating-keyboard dragging still needs a real iPad check: the simulator automation could not activate floating mode. Docked keyboard, dismissal, and search layout regressions were checked natively.