fix(dashboard): equal-height cards — stretch + fill instead of ragged

The dashboard content grids used alignItems:"start", so cards in a row sized to
their own content (ragged bottoms). Switch to alignItems:"stretch" so each row
shares one height, and make the wrapped cards actually fill the cell:

- DashProfile / DashSessions: motion-div + Card height:100% (the inner card was
  shorter than its stretched cell).
- Right column (Aktivní projekty + Nabídky): cards flex:1 so the stacked pair
  fills the column to match the neighbouring single cards.

CSS-only; no logic change. tsc clean, lint 0, 669 tests pass. Verified live via
Playwright (3-col row cells equal at 607; bottom 2-col cards equal at 257).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

package-lock.json

@@ -1,12 +1,12 @@
 {
   "name": "app-ts",
-  "version": "2.4.37",
+  "version": "2.4.38",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "app-ts",
-      "version": "2.4.37",
+      "version": "2.4.38",
       "license": "ISC",
       "dependencies": {
         "@anthropic-ai/sdk": "^0.102.0",