Add Enemies section: D&D stat-block table + detail/edit pages

- Enemy entity: full 5e stat block (size/type/subtype/alignment, AC, HP,
  speed, six ability scores, CR/XP/prof, saves/skills/senses/languages,
  damage & condition modifiers, traits/actions/bonus/reactions/legendary,
  description, source) plus a DM game-notes field and updated_at.
- CreatureSize / CreatureType enums.
- /enemies: server-side DataTable (name, size, type, CR, AC, HP, notes),
  "Add enemy" button.
- /enemies/{id}: stat block rendered read-only + editable game notes.
- /enemies/new and /enemies/{id}/edit: the full stat-block form (no notes).
- "Enemies" nav item between NPC's and Storyline.
- Table left empty on purpose.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

templates/enemy/edit.html.twig

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+{% extends 'base.html.twig' %}
+
+{% block title %}{{ is_new ? 'New enemy' : 'Edit ' ~ enemy.name }} · Enemies · dmtools{% endblock %}
+
+{% block body %}
+    <div class="mb-3">
+        <a href="{{ is_new ? path('app_enemies') : path('app_enemies_show', {id: enemy.id}) }}"
+           class="text-decoration-none small">&larr; {{ is_new ? 'All enemies' : 'Back to ' ~ enemy.name }}</a>
+        <h1 class="h3 mb-0">{{ is_new ? 'New enemy' : 'Edit ' ~ enemy.name }}</h1>
+        <span class="text-body-secondary">Stat block — game notes live on the enemy page.</span>
+    </div>
+
+    {{ form_start(form) }}
+    <div class="row g-4" style="max-width: 60rem;">
+        <div class="col-md-6">
+            <div class="card shadow-sm h-100">
+                <div class="card-header">Identity</div>
+                <div class="card-body">
+                    {{ form_row(form.name) }}
+                    <div class="row">
+                        <div class="col-6">{{ form_row(form.size) }}</div>
+                        <div class="col-6">{{ form_row(form.type) }}</div>
+                    </div>
+                    {{ form_row(form.subtype) }}
+                    {{ form_row(form.alignment) }}
+                </div>
+            </div>
+        </div>
+
+        <div class="col-md-6">
+            <div class="card shadow-sm h-100">
+                <div class="card-header">Defenses</div>
+                <div class="card-body">
+                    <div class="row">
+                        <div class="col-4">{{ form_row(form.armorClass) }}</div>
+                        <div class="col-8">{{ form_row(form.armorClassNote) }}</div>
+                    </div>
+                    <div class="row">
+                        <div class="col-4">{{ form_row(form.hitPoints) }}</div>
+                        <div class="col-8">{{ form_row(form.hitDice) }}</div>
+                    </div>
+                    {{ form_row(form.speed) }}
+                </div>
+            </div>
+        </div>
+
+        <div class="col-12">
+            <div class="card shadow-sm">
+                <div class="card-header">Ability scores</div>
+                <div class="card-body">
+                    <div class="row row-cols-3 row-cols-md-6 g-2">
+                        <div>{{ form_row(form.strength) }}</div>
+                        <div>{{ form_row(form.dexterity) }}</div>
+                        <div>{{ form_row(form.constitution) }}</div>
+                        <div>{{ form_row(form.intelligence) }}</div>
+                        <div>{{ form_row(form.wisdom) }}</div>
+                        <div>{{ form_row(form.charisma) }}</div>
+                    </div>
+                </div>
+            </div>
+        </div>
+
+        <div class="col-md-6">
+            <div class="card shadow-sm h-100">
+                <div class="card-header">Challenge</div>
+                <div class="card-body">
+                    <div class="row">
+                        <div class="col-4">{{ form_row(form.challengeRating) }}</div>
+                        <div class="col-4">{{ form_row(form.experiencePoints) }}</div>
+                        <div class="col-4">{{ form_row(form.proficiencyBonus) }}</div>
+                    </div>
+                    {{ form_row(form.source) }}
+                </div>
+            </div>
+        </div>
+
+        <div class="col-md-6">
+            <div class="card shadow-sm h-100">
+                <div class="card-header">Defensive traits</div>
+                <div class="card-body">
+                    {{ form_row(form.savingThrows) }}
+                    {{ form_row(form.skills) }}
+                    {{ form_row(form.damageVulnerabilities) }}
+                    {{ form_row(form.damageResistances) }}
+                    {{ form_row(form.damageImmunities) }}
+                    {{ form_row(form.conditionImmunities) }}
+                    {{ form_row(form.senses) }}
+                    {{ form_row(form.languages) }}
+                </div>
+            </div>
+        </div>
+
+        <div class="col-12">
+            <div class="card shadow-sm">
+                <div class="card-header">Traits &amp; actions</div>
+                <div class="card-body">
+                    {{ form_row(form.traits) }}
+                    {{ form_row(form.actions) }}
+                    {{ form_row(form.bonusActions) }}
+                    {{ form_row(form.reactions) }}
+                    {{ form_row(form.legendaryActions) }}
+                    {{ form_row(form.description) }}
+                </div>
+            </div>
+        </div>
+    </div>
+
+    <div class="mt-3 d-flex gap-2">
+        <button class="btn btn-primary">{{ is_new ? 'Add enemy' : 'Save' }}</button>
+        <a href="{{ is_new ? path('app_enemies') : path('app_enemies_show', {id: enemy.id}) }}"
+           class="btn btn-outline-secondary">Cancel</a>
+    </div>
+    {{ form_end(form) }}
+{% endblock %}

templates/enemy/index.html.twig

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+{% extends 'base.html.twig' %}
+
+{% block title %}Enemies · dmtools{% endblock %}
+
+{% block body %}
+    <div class="d-flex justify-content-between align-items-center mb-3">
+        <h1 class="h3 mb-0">Enemies</h1>
+        <a href="{{ path('app_enemies_new') }}" class="btn btn-primary btn-sm">Add enemy</a>
+    </div>
+
+    <div class="card shadow-sm">
+        <div class="card-body">
+            <table class="table table-striped table-hover align-middle datatable w-100"
+                   data-datatable-src="{{ path('app_enemies_data') }}"
+                   data-row-url="{{ path('app_enemies') }}/__ID__"
+                   data-datatable-options='{"order": [[0, "asc"]]}'>
+                <thead>
+                    <tr>
+                        <th data-data="name" data-format="link">Name</th>
+                        <th data-data="size">Size</th>
+                        <th data-data="type">Type</th>
+                        <th data-data="challengeRating">CR</th>
+                        <th data-data="armorClass">AC</th>
+                        <th data-data="hitPoints">HP</th>
+                        <th data-data="gameNotes" data-format="truncate" data-orderable="false">Game notes</th>
+                        <th data-data="updatedAt">Updated</th>
+                    </tr>
+                </thead>
+                <tbody></tbody>
+            </table>
+        </div>
+    </div>
+{% endblock %}

templates/enemy/show.html.twig

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+{% extends 'base.html.twig' %}
+
+{% block title %}{{ enemy.name }} · Enemies · dmtools{% endblock %}
+
+{% macro mod(n) %}{{ n >= 0 ? '+' ~ n : n }}{% endmacro %}
+
+{% macro stat(label, score, m) %}
+    <div class="col text-center">
+        <div class="text-uppercase small text-body-secondary">{{ label }}</div>
+        <div class="fw-semibold">{{ score }} ({{ m }})</div>
+    </div>
+{% endmacro %}
+
+{% macro line(label, value) %}
+    {% if value %}
+        <div><span class="fw-semibold">{{ label }}.</span> {{ value }}</div>
+    {% endif %}
+{% endmacro %}
+
+{% macro section(title, body) %}
+    {% if body %}
+        <h2 class="h6 border-bottom pb-1 mt-3">{{ title }}</h2>
+        <div>{{ body|nl2br }}</div>
+    {% endif %}
+{% endmacro %}
+
+{% import _self as sb %}
+
+{% block body %}
+    <div class="d-flex justify-content-between align-items-start mb-3 gap-3">
+        <div>
+            <a href="{{ path('app_enemies') }}" class="text-decoration-none small">&larr; All enemies</a>
+            <h1 class="h3 mb-0">{{ enemy.name }}</h1>
+            <span class="text-body-secondary fst-italic">{{ enemy.metaLine }}</span>
+        </div>
+        <a href="{{ path('app_enemies_edit', {id: enemy.id}) }}" class="btn btn-outline-secondary btn-sm">Edit stats</a>
+    </div>
+
+    <div class="row g-4">
+        <div class="col-lg-7">
+            <div class="card shadow-sm">
+                <div class="card-body">
+                    {{ sb.line('Armor Class', enemy.armorClass ~ (enemy.armorClassNote ? ' (' ~ enemy.armorClassNote ~ ')' : '')) }}
+                    {{ sb.line('Hit Points', enemy.hitPoints ~ (enemy.hitDice ? ' (' ~ enemy.hitDice ~ ')' : '')) }}
+                    {{ sb.line('Speed', enemy.speed) }}
+
+                    <div class="row row-cols-6 my-3 g-1">
+                        {{ sb.stat('Str', enemy.strength, sb.mod(enemy.abilityModifier(enemy.strength))) }}
+                        {{ sb.stat('Dex', enemy.dexterity, sb.mod(enemy.abilityModifier(enemy.dexterity))) }}
+                        {{ sb.stat('Con', enemy.constitution, sb.mod(enemy.abilityModifier(enemy.constitution))) }}
+                        {{ sb.stat('Int', enemy.intelligence, sb.mod(enemy.abilityModifier(enemy.intelligence))) }}
+                        {{ sb.stat('Wis', enemy.wisdom, sb.mod(enemy.abilityModifier(enemy.wisdom))) }}
+                        {{ sb.stat('Cha', enemy.charisma, sb.mod(enemy.abilityModifier(enemy.charisma))) }}
+                    </div>
+
+                    {{ sb.line('Saving Throws', enemy.savingThrows) }}
+                    {{ sb.line('Skills', enemy.skills) }}
+                    {{ sb.line('Damage Vulnerabilities', enemy.damageVulnerabilities) }}
+                    {{ sb.line('Damage Resistances', enemy.damageResistances) }}
+                    {{ sb.line('Damage Immunities', enemy.damageImmunities) }}
+                    {{ sb.line('Condition Immunities', enemy.conditionImmunities) }}
+                    {{ sb.line('Senses', enemy.senses) }}
+                    {{ sb.line('Languages', enemy.languages ?? '—') }}
+                    {{ sb.line('Challenge', enemy.challengeRating ? enemy.challengeRating ~ (enemy.experiencePoints ? ' (' ~ enemy.experiencePoints ~ ' XP)' : '') : null) }}
+                    {{ sb.line('Proficiency Bonus', enemy.proficiencyBonus ? sb.mod(enemy.proficiencyBonus) : null) }}
+
+                    {{ sb.section('Traits', enemy.traits) }}
+                    {{ sb.section('Actions', enemy.actions) }}
+                    {{ sb.section('Bonus Actions', enemy.bonusActions) }}
+                    {{ sb.section('Reactions', enemy.reactions) }}
+                    {{ sb.section('Legendary Actions', enemy.legendaryActions) }}
+                    {{ sb.section('Description', enemy.description) }}
+
+                    {% if enemy.source %}
+                        <p class="text-body-secondary small mt-3 mb-0">Source: {{ enemy.source }}</p>
+                    {% endif %}
+                </div>
+            </div>
+        </div>
+
+        <div class="col-lg-5">
+            <div class="card shadow-sm">
+                <div class="card-header d-flex justify-content-between align-items-center">
+                    <span>Game notes</span>
+                    {% if enemy.updatedAt %}
+                        <span class="text-body-secondary small fw-normal">saved {{ enemy.updatedAt|date('Y-m-d H:i') }}</span>
+                    {% endif %}
+                </div>
+                <div class="card-body">
+                    {{ form_start(form) }}
+                    {{ form_row(form.gameNotes) }}
+                    <button class="btn btn-primary mt-2">Save notes</button>
+                    {{ form_end(form) }}
+                </div>
+            </div>
+        </div>
+    </div>
+{% endblock %}