fix(freelancer): the 15-point rule is now one shared constant, in both forms

The edit form's legend read "Skill areas" and carried no directive, while the
application form read "Skill profile — 15 points to distribute" and said what to
do. Same rule, worded in two places — and the edit form lost the sentence.

- New static/focus-rule.js exposes window.O4PFocus: LEGEND, DIRECTIVE, TOTAL, MAX
  and message(sum). Both forms render the legend, the directive and the
  wrong-total message from it, so the two cannot drift apart again.
- Edit form: legend from the constant, the application form's directive under it,
  and the blocked-save message now names the direction.
- Application form: legend set from the constant, live warn and sum gate use the
  same message(); the all-zero gate keeps the directive.
- Message wording: over -> "remove N", under -> "add N", zero -> "place all 15
  points"; the total, aria-live, data-bad, the blocked save and the
  fieldset/legend structure are unchanged.

The rule text now appears once: "You have 17 of 15 — remove 2."

odoo-community-developers/index.html

@@ -1949,6 +1949,7 @@
     </footer>
 
     <script defer src="/static/lang.js"></script>
+    <script src="/static/focus-rule.js"></script>
     <script>
       /* ============================================================================
          Odoo freelancer directory — page script.
@@ -1994,8 +1995,8 @@
       // The five self-assessed focus axes — each a SEPARATE numeric field (0-5) on the
       // wire, no CSV, no encoding. They must total exactly FOCUS_TOTAL.
       var FOCUS_AXES = ["functional", "system", "modules", "integration", "ai"];
-      var FOCUS_TOTAL = 15;
-      var FOCUS_MAX = 5;
+      var FOCUS_TOTAL = O4PFocus.TOTAL; // the shared rule (static/focus-rule.js)
+      var FOCUS_MAX = O4PFocus.MAX;
       var FOCUS_AXIS_LABELS = {
         functional: "Functional", system: "System", modules: "Modules",
         integration: "Integration", ai: "AI"
@@ -2089,22 +2090,17 @@
          savable — an all-zero block is simply left unsent). */
       function focusError(form, required) {
         var sum = focusSum(form);
-        if (sum === 0) {
-          return required
-            ? "Distribute all 15 points across the five areas — they cannot all be 0."
-            : "";
-        }
-        if (sum !== FOCUS_TOTAL) {
-          return "Your five focus numbers total " + sum + ". They must total exactly " +
-            FOCUS_TOTAL + ".";
-        }
-        return "";
+        if (sum === 0) return required ? O4PFocus.DIRECTIVE : "";
+        return O4PFocus.message(sum); // "" when right; names the direction when not
       }
 
       /* Wire one form's sliders: five <input type=range> with an adjacent <output>, a
          live running total, and a live warning while the number is wrong. */
       function initFocusUI(form, warnId, totalId) {
         if (!form) return;
+        // The legend text comes from the shared rule (static/focus-rule.js), not the markup.
+        var legendEl = form.querySelector(".focus-field legend");
+        if (legendEl) legendEl.textContent = O4PFocus.LEGEND;
         var wraps = form.querySelectorAll(".focus-field");
         Array.prototype.forEach.call(wraps, function (w) {
           var hidden = w.querySelector(".focus-sliders");
@@ -2125,12 +2121,7 @@
             el.setAttribute("aria-valuetext", n + " of " + FOCUS_MAX);
           });
           if (total) total.textContent = sum + " of " + FOCUS_TOTAL + " points";
-          if (warn) {
-            warn.textContent = sum === FOCUS_TOTAL
-              ? ""
-              : (sum === 0 ? "You have 0 of 15 — place all 15 points."
-                           : "You have " + sum + " of 15. The five must total exactly 15.");
-          }
+          if (warn) warn.textContent = O4PFocus.message(sum);
         }
         Array.prototype.forEach.call(form.querySelectorAll(".focus-field input"), function (el) {
           el.addEventListener("input", refresh);