feat(menu): Google web search; note calc rework in the roadmap

The web module now opens google.com/search instead of DuckDuckGo. Also log
a roadmap item to rework calc: qalc -t misparses common phrasings (15% of
200 -> rem(15, 1 B)) and the result only shows in the next menu's -mesg
line -- move toward live results as you type.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

README.md

@@ -272,7 +272,7 @@ close · `SUPER+1..9` workspaces · `Print` region screenshot.
     `nomarchy-menu` dispatcher: root picker (no args) · `power`
     (lock/logout/suspend/hibernate/reboot/shutdown, SUPER+X) ·
     `theme` (SUPER+T) · `clipboard` (cliphist, SUPER+CTRL+V) · `calc`
-    (qalc, copy/chain) · `files` (fd → xdg-open) · `web` (DuckDuckGo).
+    (qalc, copy/chain) · `files` (fd → xdg-open) · `web` (Google).
     SUPER+D is `rofi -show drun`.
   - ✓ shipped modules: `network` (nmtui in `$TERMINAL`) · `bluetooth`
     (blueman-manager) · `capture` (grim/slurp submenu: region/full →
@@ -294,6 +294,15 @@ close · `SUPER+1..9` workspaces · `Print` region screenshot.
     launcher, no second theming pipeline; the dispatcher owns the menu
     structure, so the renderer stays swappable (we moved fuzzel → rofi 2.0
     once mainline gained native Wayland, for its richer theming)
+- **Calculator module rework:** the current `calc` flow
+  (`modules/home/rofi.nix`) is unsatisfying — you commit the expression
+  blind, then the result only appears in the *next* menu's `-mesg` line,
+  and `qalc -t` misparses common phrasings (e.g. `15% of 200` →
+  `rem(15, 1 B)` instead of `30`). Rework toward live results as you type
+  (rofi-calc-style: each keystroke re-evaluates and the answer is the top
+  entry, Enter copies), a more robust qalc invocation, and graceful
+  handling of parse errors. Decide whether to keep the hand-rolled dmenu
+  loop or adopt a dedicated calc mode/plugin.
 - **Theme parity with legacy:** summer-day/night now carry their legacy
   bar layouts as `waybar.jsonc` whole-swaps (adapted: dead legacy script
   modules dropped, Nerd-Fonts-v2 codepoints remapped to FontAwesome/v3,

modules/home/rofi.nix

@@ -106,7 +106,7 @@ let
       web)
         q=$(rofi -dmenu -p search < /dev/null) || exit 0
         [ -n "$q" ] || exit 0
-        exec xdg-open "https://duckduckgo.com/?q=$(urlencode "$q")" ;;
+        exec xdg-open "https://www.google.com/search?q=$(urlencode "$q")" ;;
 
       network)
         # nmtui in a terminal (NetworkManager is the system network stack).