feat(budgets): top line per currency, sorting places into budgets, projections

Budgets show budgeted, left, spent and spent without a budget per
currency, safe per day and where the month ends. t sorts expenses
without a budget by place, 1 to 9 move a whole place into a budget, u
undoes, and the editor and quick entry remember the place. A suggests
empty amounts from three months. Categories get the same sorting.

src/lib/components/budgets/LimitCell.svelte

@@ -13,6 +13,7 @@
     budgetId,
     range,
     editing,
+    suggested = null,
     trap = true,
     onedit,
     ondone,
@@ -21,6 +22,7 @@
     budgetId: string;
     range: Range;
     editing: boolean;
+    suggested?: number | null;
     trap?: boolean;
     onedit: () => void;
     ondone: (move: Move) => void;
@@ -33,7 +35,7 @@
   $effect(() => {
     if (editing) {
       untrack(() => {
-        value = line.amount ? String(line.amount) : "";
+        value = String(line.amount || suggested || "");
         problem = "";
       });
     }
@@ -123,6 +125,20 @@
       {@attach focus}
     >
   </span>
+{:else if suggested && line.amount === null}
+  <button
+    class="num border-brand border-b border-dashed font-semibold leading-tight text-brand"
+    onclick={onedit}
+    title="Suggested from the last 3 months (e to change)"
+    type="button"
+  >
+    <span class="font-normal text-[11px]">suggested</span>
+    {formatMoney({
+      amount: suggested,
+      decimals: line.cur.decimals,
+      symbol: line.cur.symbol,
+    })}
+  </button>
 {:else}
   <button
     class="num border-cladd-fg-softest border-b border-dashed leading-tight hover:border-brand hover:text-brand {line.amount