feat(ui): context panel enhancements — resizable panels, drag-and-drop todo ordering, and persistent sizes (#1269)

* fix: remove max-h-80 cap on quick notes textarea so resized height is respected

* feat: add drag & drop reordering to project todo items

* feat: make todo panel resizable with density-aware sizing

* feat: open plan import file picker at project root

* feat: persist quick notes and todo panel sizes across sessions

* refactor(ui): scale content height with padding in projectnotestodopanel

* Update packages/ui/src/components/session/ProjectNotesTodoPanel.tsx

Signed-off-by: Erman HAVUÇ <ermanhavuc@gmail.com>

* fix(ui): harden context panel resizing and import

---------

Signed-off-by: Erman HAVUÇ <ermanhavuc@gmail.com>
Co-authored-by: Bohdan Triapitsyn <artmore@protonmail.com>

packages/electron/main.mjs

@@ -2575,6 +2575,9 @@ ipcMain.handle('openchamber:dialog:open', async (event, options) => {
   const browserWindow = BrowserWindow.fromWebContents(event.sender);
   const result = await dialog.showOpenDialog(browserWindow || undefined, {
     title: typeof options?.title === 'string' ? options.title : undefined,
+    defaultPath: typeof options?.defaultPath === 'string' && options.defaultPath.trim().length > 0
+      ? options.defaultPath.trim()
+      : undefined,
     filters: Array.isArray(options?.filters)
       ? options.filters
           .filter((filter) => filter && typeof filter === 'object')