feat(menu): add sort (date/name/size), live filter, reverse; visible-only A/N; responsive footer (#34)

Paginated menu:
- Sorting: press S/s to cycle Date → Name → Size; press R/r to reverse.
- Live filter: press F/f to enter; case-insensitive substring; prefix with ' to anchor at start; DELETE to backspace; ENTER to apply; ESC to cancel. Shows “searching…” while rebuilding.
- Selection scope: A (All) and N (None) now work on the currently visible items only (after filter/sort), not the entire list.
- Footer: adds A/N to the help line and wraps only at ' | ' separators so labels are never broken; adapts to terminal width.
- Internals: view_indices mapping for filtered/sorted view; glob-safe matching via _pm_escape_glob; drain_pending_input; robust stty restore; optional MOLE_MANAGED_ALT_SCREEN; cleanup unsets MOLE_READ_KEY_FORCE_CHAR; shellcheck clean.

common.sh:
- read_key supports a raw typing mode (MOLE_READ_KEY_FORCE_CHAR=1) emitting CHAR:<k>; ENTER/DELETE/ESC handled.
- Uppercase A/N/R mappings (ALL/NONE/RETRY), printable-key detection, better ESC sequence handling.

app_selector.sh:
- Builds and exports per-item metadata CSV for epochs and size_kb via MOLE_MENU_META_EPOCHS and MOLE_MENU_META_SIZEKB; unsets them after the menu.
- Menu options keep display text; sorting/filtering use metadata.

uninstall.sh:
- Computes app_size_kb using du -sk for numeric sorting while keeping human-readable size; writes it as the final field.
- load_applications reads the new size_kb field.

Notes:
- Footer grew due to new commands; responsive wrapping prevents mid-word breaks.
- ./tests/run.sh: only the two upstream failures remain (unchanged by this patch).

Co-authored-by: Jonas Bertossa <jonas.bertossa@eoc.ch>

lib/common.sh

@@ -176,9 +176,29 @@ show_cursor() {
 # Keyboard input handling (simple and robust)
 read_key() {
     local key rest
-    # Use macOS bash 3.2 compatible read syntax
     IFS= read -r -s -n 1 key || return 1
 
+    # Raw typing mode (filter): map most keys to CHAR:<key>
+    if [[ "${MOLE_READ_KEY_FORCE_CHAR:-}" == "1" ]]; then
+        # Some terminals return empty on Enter with -n1
+        if [[ -z "$key" ]]; then
+            echo "ENTER"
+            return 0
+        fi
+        case "$key" in
+            $'\n'|$'\r') echo "ENTER" ;;
+            $'\x7f'|$'\x08') echo "DELETE" ;;
+            $'\x1b') echo "QUIT" ;;   # ESC cancels filter
+            *)
+                case "$key" in
+                    [[:print:]]) echo "CHAR:$key" ;;
+                    *) echo "OTHER" ;;
+                esac
+                ;;
+        esac
+        return 0
+    fi
+
     # Some terminals can yield empty on Enter with -n1; treat as ENTER
     if [[ -z "$key" ]]; then
         echo "ENTER"
@@ -189,14 +209,13 @@ read_key() {
         $'\n' | $'\r') echo "ENTER" ;;
         ' ') echo "SPACE" ;;
         'q' | 'Q') echo "QUIT" ;;
-        'a' | 'A') echo "ALL" ;;
-        'n' | 'N') echo "NONE" ;;
-        'd' | 'D') echo "DELETE" ;;
-        'r' | 'R') echo "RETRY" ;;
+        'A') echo "ALL" ;;
+        'N') echo "NONE" ;;
+        'R') echo "RETRY" ;;
         '?') echo "HELP" ;;
         'o' | 'O') echo "OPEN" ;;
         $'\x03') echo "QUIT" ;;             # Ctrl+C
-        $'\x7f' | $'\x08') echo "DELETE" ;; # Delete key (labeled "delete" on Mac, actually backspace)
+        $'\x7f' | $'\x08') echo "DELETE" ;; # Backspace/Delete key
         $'\x1b')
             # ESC sequence - could be arrow key, delete key, or ESC alone
             # Read the next two bytes within 1s
@@ -241,7 +260,13 @@ read_key() {
                 echo "QUIT"
             fi
             ;;
-        *) echo "OTHER" ;;
+        *)
+            # Printable ASCII -> expose as CHAR:<key> (for live filtering)
+            case "$key" in
+                [[:print:]]) echo "CHAR:$key" ;;
+                *) echo "OTHER" ;;
+            esac
+            ;;
     esac
 }