feat(ledger): expandable entry rows with transactions table and add form

Each month entry becomes a <details> block. The summary is the same
dense row (name, planned, applied, delete) plus a leading caret and
an applied cell that shows the transaction count ("$412.33 · 7 txns")
when postings exist. Expansion adds no horizontal space.

Expanded body holds: the entry's notes input, a transactions table
with date / description / payee / amount / delete per posting, and
an inline add-transaction form (date, description, payee, amount,
submit). Every field is HTMX-wired so editing any cell triggers the
section partial re-render with fresh derived totals.

Closed month: name / planned / notes / posting fields all collapse
to read-only spans, delete buttons and add forms are omitted. The
existing editable flag controls the branching.

Refs #19

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/quartermaster/static/app.css

@@ -675,6 +675,295 @@ tr.entry:hover + tr.entry-notes-row:has(input:placeholder-shown) {
   padding: 0.15rem 0.4rem;
 }
 
+/* =============== MONTH ENTRIES — details-based layout =============== */
+
+.month-entries {
+  display: flex;
+  flex-direction: column;
+}
+
+.entry-block {
+  border-bottom: 1px dotted var(--rule);
+  margin: 0;
+}
+
+.entry-block > summary {
+  list-style: none;
+  cursor: pointer;
+  user-select: none;
+  display: grid;
+  grid-template-columns: 0.9rem minmax(0, 1fr) 5.5rem 5.5rem 1.2rem;
+  gap: 0.6rem;
+  align-items: baseline;
+  padding: 0.32rem 0.25rem 0.36rem;
+  position: relative;
+}
+.entry-block > summary::-webkit-details-marker { display: none; }
+.entry-block > summary:hover { background: var(--paper-stripe); }
+
+/* Progress bar on the summary row */
+.entry-block > summary::after {
+  content: "";
+  position: absolute;
+  left: 0; right: 0; bottom: -1px;
+  height: 2px;
+  background: var(--sage-soft);
+  width: min(100%, calc(var(--ratio, 1) * 100%));
+  transition: width 0.25s ease;
+  opacity: 0.7;
+}
+.entry-block > summary.state-edited::after { background: var(--accent); opacity: 0.85; }
+.entry-block > summary.state-new_in_month::after { background: var(--indigo); opacity: 0.55; }
+
+/* Caret: rotates on [open] */
+.entry-block .caret {
+  display: inline-block;
+  width: 0.7rem;
+  position: relative;
+  transform: rotate(0deg);
+  transition: transform 0.15s ease;
+  align-self: center;
+}
+.entry-block .caret::before {
+  content: "▸";
+  font-size: 0.7rem;
+  color: var(--muted);
+  display: inline-block;
+  line-height: 1;
+}
+.entry-block[open] > summary .caret { transform: rotate(90deg); }
+
+/* Entry row cells */
+.entry-block .entry-name {
+  font-weight: 500;
+  font-size: 1rem;
+  min-width: 0;
+  overflow: hidden;
+}
+.entry-block .entry-name input,
+.entry-block .entry-amount input {
+  font: inherit;
+  color: inherit;
+  background: transparent;
+  border: none;
+  border-bottom: 1px solid transparent;
+  padding: 0;
+  width: 100%;
+  outline: none;
+  transition: border-color 0.12s;
+}
+.entry-block .entry-name input:hover,
+.entry-block .entry-amount input:hover { border-bottom-color: var(--rule); }
+.entry-block .entry-name input:focus,
+.entry-block .entry-amount input:focus { border-bottom-color: var(--ink); }
+
+.entry-block .entry-amount {
+  font-weight: 500;
+  font-size: 1rem;
+  text-align: right;
+  font-feature-settings: "lnum" 1, "tnum" 1;
+  min-width: 0;
+}
+.entry-block .entry-amount input {
+  text-align: right;
+  font-variant-numeric: tabular-nums;
+}
+.entry-block .entry-amount.planned input { color: var(--muted); font-weight: 400; }
+
+.entry-block .applied-cell {
+  display: flex;
+  justify-content: flex-end;
+  align-items: baseline;
+  gap: 0.3rem;
+}
+.entry-block .applied-cell .value {
+  font-weight: 500;
+}
+.entry-block .applied-cell .count {
+  font-family: var(--sans);
+  font-size: 0.66rem;
+  letter-spacing: 0.16em;
+  text-transform: lowercase;
+  color: var(--muted);
+}
+
+.entry-block .entry-actions button.delete {
+  font-size: 1.1rem;
+  line-height: 1;
+  color: var(--rule);
+  background: none;
+  border: none;
+  cursor: pointer;
+  padding: 0;
+  opacity: 0;
+  transition: color 0.12s ease, opacity 0.12s ease;
+  align-self: center;
+}
+.entry-block > summary:hover .entry-actions button.delete { opacity: 1; }
+.entry-block .entry-actions button.delete:hover { color: var(--accent); }
+
+/* Expanded body */
+.entry-block .entry-body {
+  padding: 0.5rem 1.6rem 0.75rem;
+  background: var(--paper-soft);
+  border-top: 1px solid var(--rule-soft);
+}
+
+.entry-block .entry-notes {
+  margin-bottom: 0.5rem;
+}
+.entry-block .entry-notes input {
+  font-family: var(--sans);
+  font-style: italic;
+  font-size: 0.85rem;
+  color: var(--ink);
+  width: 100%;
+  background: transparent;
+  border: none;
+  border-bottom: 1px dashed var(--rule);
+  padding: 0.15rem 0;
+  outline: none;
+}
+.entry-block .entry-notes input:focus { border-bottom-color: var(--ink); }
+.entry-block .entry-notes.readonly {
+  font-family: var(--sans);
+  font-style: italic;
+  font-size: 0.85rem;
+  color: var(--muted);
+}
+
+/* Transactions table */
+table.transactions {
+  width: 100%;
+  border-collapse: collapse;
+  font-family: var(--sans);
+  font-size: 0.88rem;
+  margin-bottom: 0.4rem;
+}
+table.transactions thead th {
+  text-align: left;
+  font-weight: 600;
+  font-size: 0.66rem;
+  letter-spacing: 0.22em;
+  text-transform: uppercase;
+  color: var(--muted);
+  padding: 0.2rem 0.3rem 0.25rem;
+  border-bottom: 1px solid var(--rule);
+}
+table.transactions th.col-amount,
+table.transactions td.col-amount { text-align: right; width: 5.5rem; }
+table.transactions th.col-date,
+table.transactions td.col-date { width: 7.5rem; }
+table.transactions th.col-actions,
+table.transactions td.col-actions { width: 1.2rem; }
+
+table.transactions td {
+  padding: 0.2rem 0.3rem;
+  border-bottom: 1px dotted var(--rule-soft);
+}
+table.transactions tr.posting:hover { background: var(--paper); }
+table.transactions input {
+  font: inherit;
+  color: inherit;
+  background: transparent;
+  border: none;
+  border-bottom: 1px solid transparent;
+  padding: 0;
+  width: 100%;
+  outline: none;
+  transition: border-color 0.12s;
+}
+table.transactions input:hover { border-bottom-color: var(--rule); }
+table.transactions input:focus { border-bottom-color: var(--ink); }
+table.transactions input[type="number"] {
+  text-align: right;
+  font-variant-numeric: tabular-nums;
+}
+table.transactions input[type="date"] {
+  font-family: var(--sans);
+  color: var(--muted);
+}
+table.transactions tr.empty td {
+  color: var(--muted);
+  font-style: italic;
+  text-align: center;
+  padding: 0.5rem;
+}
+
+table.transactions td .readonly {
+  color: var(--ink);
+}
+
+table.transactions button.delete {
+  font-size: 1rem;
+  color: var(--rule);
+  background: none;
+  border: none;
+  cursor: pointer;
+  padding: 0;
+  opacity: 0;
+  transition: color 0.12s ease, opacity 0.12s ease;
+}
+table.transactions tr:hover button.delete { opacity: 1; }
+table.transactions button.delete:hover { color: var(--accent); }
+
+/* Add-posting form */
+form.add-posting-form {
+  display: grid;
+  grid-template-columns: 7.5rem minmax(0, 1fr) minmax(0, 1fr) 5.5rem auto;
+  gap: 0.4rem;
+  align-items: center;
+  padding: 0.35rem 0.3rem 0.2rem;
+  border-top: 1px dashed var(--rule);
+}
+form.add-posting-form input {
+  font: inherit;
+  font-size: 0.88rem;
+  padding: 0.2rem 0.4rem;
+  border: 1px solid var(--rule);
+  background: var(--paper);
+  color: var(--ink);
+  outline: none;
+  transition: border-color 0.12s;
+}
+form.add-posting-form input[type="number"] { text-align: right; font-variant-numeric: tabular-nums; }
+form.add-posting-form input:focus { border-color: var(--ink); }
+form.add-posting-form button[type="submit"] {
+  font-family: var(--sans);
+  font-weight: 600;
+  font-size: 0.72rem;
+  padding: 0.25rem 0.75rem;
+  border: 1px solid var(--ink);
+  background: var(--paper-soft);
+  color: var(--ink);
+  letter-spacing: 0.12em;
+  text-transform: uppercase;
+  cursor: pointer;
+  transition: background 0.12s ease, color 0.12s ease;
+}
+form.add-posting-form button[type="submit"]:hover { background: var(--ink); color: var(--paper); }
+
+.empty-row {
+  padding: 0.5rem 0.5rem;
+  color: var(--muted);
+  font-style: italic;
+  font-size: 0.9rem;
+}
+
+@media (max-width: 640px) {
+  .entry-block > summary {
+    grid-template-columns: 0.9rem minmax(0, 1fr) 4.6rem 4.6rem 1rem;
+    gap: 0.4rem;
+  }
+  .entry-block .entry-body { padding: 0.5rem 0.75rem 0.6rem; }
+  form.add-posting-form {
+    grid-template-columns: 1fr 1fr;
+  }
+  form.add-posting-form input[type="date"],
+  form.add-posting-form input[type="number"],
+  form.add-posting-form button[type="submit"] { grid-column: 1 / -1; }
+}
+
 /* Disabled inputs (closed month) */
 input[disabled],
 select[disabled],

src/quartermaster/templates/partials/month_section.html

@@ -2,68 +2,61 @@
   <div class="section-header">
     <h2>{{ section.label }}</h2>
     <span class="total" data-testid="total-{{ section.section.value }}">
-      <span class="applied">${{ '%.2f' | format(section.total_applied) }}</span>
+      <span class="applied">${{ '{:,.2f}'.format(section.total_applied) }}</span>
       <span class="divider">/</span>
-      <span class="planned">${{ '%.2f' | format(section.total_planned) }}</span>
+      <span class="planned">${{ '{:,.2f}'.format(section.total_planned) }}</span>
     </span>
   </div>
-  <table class="entries month-entries">
+  <div class="entries month-entries">
-    <thead>
-      <tr>
-        <th class="col-name">Name</th>
-        <th class="col-planned">Planned</th>
-        <th class="col-applied">Applied</th>
-        <th class="col-actions"></th>
-      </tr>
-    </thead>
-    <tbody>
     {% for row in section.rows %}
-        <tr class="entry state-{{ row.state.value }}" data-entry-id="{{ row.entry.id }}">
+      {% set applied = row.entry.applied %}
-          <td class="entry-name">
+      <details class="entry-block" data-entry-id="{{ row.entry.id }}">
+        <summary class="entry-row state-{{ row.state.value }}" style="--ratio: {{ (applied / row.entry.planned)|round(4) if row.entry.planned > 0 else 0 }}">
+          <span class="caret" aria-hidden="true"></span>
+          <span class="entry-name">
+            {% if editable %}
               <input
                 type="text"
                 name="name"
                 value="{{ row.entry.name }}"
-              {% if editable %}
                 hx-post="/month/{{ month.year_month }}/entries/{{ row.entry.id }}"
                 hx-trigger="change"
                 hx-target="#section-{{ section.section.value }}"
                 hx-swap="outerHTML"
-              {% else %}disabled{% endif %}
+                aria-label="Name"
               >
+            {% else %}
+              <span class="readonly">{{ row.entry.name }}</span>
+            {% endif %}
             {% if row.state.value == 'edited' %}
               <span class="tag tag-edited">modified</span>
             {% elif row.state.value == 'new_in_month' %}
               <span class="tag tag-new">new this month</span>
             {% endif %}
-          </td>
+          </span>
-          <td class="entry-amount">
+          <span class="entry-amount planned">
+            {% if editable %}
               <input
                 type="number" step="0.01" min="0"
                 name="planned"
                 value="{{ '%.2f' | format(row.entry.planned) }}"
-              {% if editable %}
                 hx-post="/month/{{ month.year_month }}/entries/{{ row.entry.id }}"
                 hx-trigger="change"
                 hx-target="#section-{{ section.section.value }}"
                 hx-swap="outerHTML"
-              {% else %}disabled{% endif %}
+                aria-label="Planned"
               >
-          </td>
+            {% else %}
-          <td class="entry-amount">
+              <span class="readonly">${{ '{:,.2f}'.format(row.entry.planned) }}</span>
-            <input
+            {% endif %}
-              type="number" step="0.01" min="0"
+          </span>
-              name="applied"
+          <span class="entry-amount applied-cell" aria-label="Applied">
-              value="{{ '%.2f' | format(row.entry.applied) }}"
+            <span class="value">${{ '{:,.2f}'.format(applied) }}</span>
-              {% if editable %}
+            {% if row.entry.postings|length > 0 %}
-                hx-post="/month/{{ month.year_month }}/entries/{{ row.entry.id }}"
+              <span class="count">· {{ row.entry.postings|length }} txn{% if row.entry.postings|length != 1 %}s{% endif %}</span>
-                hx-trigger="change"
+            {% endif %}
-                hx-target="#section-{{ section.section.value }}"
+          </span>
-                hx-swap="outerHTML"
+          <span class="entry-actions">
-              {% else %}disabled{% endif %}
-            >
-          </td>
-          <td class="entry-actions">
             {% if editable %}
               <button
                 class="delete"
@@ -74,32 +67,142 @@
                 aria-label="Delete {{ row.entry.name }}"
               >&times;</button>
             {% endif %}
-          </td>
+          </span>
-        </tr>
+        </summary>
-        <tr class="entry-notes-row">
+        <div class="entry-body">
-          <td colspan="4">
+          {% if editable %}
+            <div class="entry-notes">
               <input
                 class="notes-input"
                 type="text"
                 name="notes"
                 value="{{ row.entry.notes or '' }}"
-              placeholder="notes..."
+                placeholder="notes for this entry..."
-              {% if editable %}
                 hx-post="/month/{{ month.year_month }}/entries/{{ row.entry.id }}"
                 hx-trigger="change"
                 hx-target="#section-{{ section.section.value }}"
                 hx-swap="outerHTML"
-                aria-label="Notes for {{ row.entry.name }}"
+                aria-label="Notes"
-              {% else %}disabled{% endif %}
               >
+            </div>
+          {% elif row.entry.notes %}
+            <div class="entry-notes readonly">{{ row.entry.notes }}</div>
+          {% endif %}
+          <table class="transactions">
+            <thead>
+              <tr>
+                <th class="col-date">Date</th>
+                <th class="col-desc">Description</th>
+                <th class="col-payee">Payee</th>
+                <th class="col-amount">Amount</th>
+                <th class="col-actions"></th>
+              </tr>
+            </thead>
+            <tbody>
+              {% for posting in row.entry.postings %}
+                <tr class="posting" data-posting-id="{{ posting.id }}">
+                  <td class="col-date">
+                    {% if editable %}
+                      <input
+                        type="date" name="occurred_on"
+                        value="{{ posting.occurred_on.isoformat() }}"
+                        hx-post="/month/{{ month.year_month }}/postings/{{ posting.id }}"
+                        hx-trigger="change"
+                        hx-target="#section-{{ section.section.value }}"
+                        hx-swap="outerHTML"
+                        aria-label="Date"
+                      >
+                    {% else %}
+                      <span class="readonly">{{ posting.occurred_on.isoformat() }}</span>
+                    {% endif %}
+                  </td>
+                  <td class="col-desc">
+                    {% if editable %}
+                      <input
+                        type="text" name="description"
+                        value="{{ posting.description or '' }}"
+                        placeholder="description"
+                        hx-post="/month/{{ month.year_month }}/postings/{{ posting.id }}"
+                        hx-trigger="change"
+                        hx-target="#section-{{ section.section.value }}"
+                        hx-swap="outerHTML"
+                        aria-label="Description"
+                      >
+                    {% else %}
+                      <span class="readonly">{{ posting.description or '' }}</span>
+                    {% endif %}
+                  </td>
+                  <td class="col-payee">
+                    {% if editable %}
+                      <input
+                        type="text" name="payee"
+                        value="{{ posting.payee or '' }}"
+                        placeholder="payee"
+                        hx-post="/month/{{ month.year_month }}/postings/{{ posting.id }}"
+                        hx-trigger="change"
+                        hx-target="#section-{{ section.section.value }}"
+                        hx-swap="outerHTML"
+                        aria-label="Payee"
+                      >
+                    {% else %}
+                      <span class="readonly">{{ posting.payee or '' }}</span>
+                    {% endif %}
+                  </td>
+                  <td class="col-amount">
+                    {% if editable %}
+                      <input
+                        type="number" step="0.01" name="amount"
+                        value="{{ '%.2f' | format(posting.amount) }}"
+                        hx-post="/month/{{ month.year_month }}/postings/{{ posting.id }}"
+                        hx-trigger="change"
+                        hx-target="#section-{{ section.section.value }}"
+                        hx-swap="outerHTML"
+                        aria-label="Amount"
+                      >
+                    {% else %}
+                      <span class="readonly">${{ '{:,.2f}'.format(posting.amount) }}</span>
+                    {% endif %}
+                  </td>
+                  <td class="col-actions">
+                    {% if editable %}
+                      <button
+                        class="delete"
+                        type="button"
+                        hx-delete="/month/{{ month.year_month }}/postings/{{ posting.id }}"
+                        hx-target="#section-{{ section.section.value }}"
+                        hx-swap="outerHTML"
+                        aria-label="Delete transaction"
+                      >&times;</button>
+                    {% endif %}
                   </td>
                 </tr>
               {% else %}
-        <tr class="empty"><td colspan="4">No entries.</td></tr>
+                <tr class="empty"><td colspan="5">No transactions yet.</td></tr>
+              {% endfor %}
+            </tbody>
+          </table>
+          {% if editable %}
+            <form
+              class="add-posting-form"
+              hx-post="/month/{{ month.year_month }}/entries/{{ row.entry.id }}/postings"
+              hx-target="#section-{{ section.section.value }}"
+              hx-swap="outerHTML"
+              hx-on::after-request="if(event.detail.successful) this.reset()"
+            >
+              <input type="date" name="occurred_on" required value="{{ month.year_month }}-01" aria-label="Date">
+              <input type="text" name="description" placeholder="description" aria-label="Description">
+              <input type="text" name="payee" placeholder="payee" aria-label="Payee">
+              <input type="number" step="0.01" name="amount" placeholder="0.00" required aria-label="Amount">
+              <button type="submit">Add transaction</button>
+            </form>
+          {% endif %}
+        </div>
+      </details>
+    {% else %}
+      <div class="empty-row">No entries.</div>
     {% endfor %}
     {% if editable %}
-        <tr class="add-row">
+      <div class="add-row">
-          <td colspan="4">
         <form
           class="add-form month-add-form"
           hx-post="/month/{{ month.year_month }}/sections/{{ section.section.value }}/entries"
@@ -112,9 +215,7 @@
           <button type="submit">Add</button>
           <input class="notes-input add-notes" type="text" name="notes" placeholder="notes (optional)">
         </form>
-          </td>
+      </div>
-        </tr>
     {% endif %}
-    </tbody>
+  </div>
-  </table>
 </section>