candidates: фикс смены группировки (422 при сабмите bulk-формы)

- Группировка вынесена из onchange-сабмита bulk-формы в GET-ссылки
  (/candidates?group_by=...&filters...&selected=...)
- Чекбоксы bulk привязаны к форме атрибутом form='bulk-form' (без JS,
  HTML5) — устранены вложенные формы (невалидный HTML)
- Выбор поста — ссылкой GET (selected=id) вместо POST /candidates/select
- app.py: добавлен filters_qs (query-string фильтров для ссылок),
  импорт urllib.parse.quote; /candidates/select оставлен для обратной
  совместимости (сабмит старых форм)
- Тест: смена группировки, bulk reject, выбор поста, фильтры — зелёные

web/app.py

@@ -8,6 +8,7 @@ import secrets
 import sqlite3
 from datetime import datetime
 from pathlib import Path
+from urllib.parse import quote
 
 import markdown as md_lib
 from fastapi import FastAPI, Form, HTTPException, Request, Response
@@ -250,9 +251,17 @@ def candidates(request: Request, direction: str = "", status: str = "", own: str
                     continue
                 break
     conn.close()
+    # строка параметров фильтров для ссылок (выбор поста, смена группировки)
+    qs = []
+    for k, v in (("direction", direction), ("status", status), ("own", own), ("q", q)):
+        if v:
+            qs.append(f"{k}={quote(v)}")
+    if not selected:
+        selected = sel["id"] if sel else 0
+    filters_qs = "&".join(qs)
     html = tpl.get_template("candidates.html").render(
         posts=grouped, counts=counts, status=status, direction=direction, own=own,
-        q=q, group_by=group_by, selected=sel, error=error,
+        q=q, group_by=group_by, selected=sel, error=error, filters_qs=filters_qs,
         directions=DIRECTIONS, STATUS_LABELS=STATUS_LABELS, STATUS_COLORS=STATUS_COLORS,
     )
     return HTMLResponse(html)

web/templates/candidates.html

@@ -45,30 +45,24 @@
   </div>
 </form>
 
-<form method="post" action="/candidates/bulk" id="bulk-form"
-      onsubmit="return confirm('Выполнить групповое действие над выбранными?')">
-  <input type="hidden" name="direction" value="{{ direction }}">
-  <input type="hidden" name="status" value="{{ status }}">
-  <input type="hidden" name="own" value="{{ own }}">
-  <input type="hidden" name="q" value="{{ q }}">
-  <input type="hidden" name="group_by" value="{{ group_by }}">
+{% set selected_qs = '&selected=' ~ selected.id if selected else '' %}
 
-  <div class="row g-0">
+<div class="row g-0">
   <div class="col-md-5">
-      <div class="border rounded p-2" style="max-height: 78vh; overflow-y:auto; background:#fff;">
+    <div class="border rounded p-2 d-flex flex-column" style="max-height: 78vh; background:#fff;">
       <div class="d-flex align-items-center mb-1">
         <span class="me-2 text-muted small">Группировка:</span>
-          <select name="group_by" class="form-select form-select-sm d-inline" style="width:auto;"
-                  onchange="this.form.submit()">
-            {% for val in ['source', 'date', 'status'] %}
-              <option value="{{ val }}" {% if group_by == val %}selected{% endif %}>
-                {% if val == 'source' %}по источнику{% elif val == 'date' %}по дате{% else %}по статусу{% endif %}
-              </option>
+        {% for val, label in [('source', 'по источнику'), ('date', 'по дате'), ('status', 'по статусу')] %}
+          {% if group_by == val %}
+            <span class="badge bg-primary text-white me-1">{{ label }}</span>
+          {% else %}
+            <a class="badge bg-light text-dark border me-1 text-decoration-none"
+               href="/candidates?group_by={{ val }}{% if filters_qs %}&{{ filters_qs }}{% endif %}{{ selected_qs }}">{{ label }}</a>
+          {% endif %}
         {% endfor %}
-          </select>
-          <button class="btn btn-sm btn-outline-secondary ms-2" type="submit">➡️</button>
       </div>
 
+      <div style="overflow-y:auto; flex:1 1 auto;">
         {% for g in posts %}
         <details {% if loop.first or (selected and selected.id in g.posts|map(attribute='id')|list) %}open{% endif %} class="mb-2">
           <summary class="small text-secondary">
@@ -81,25 +75,17 @@
           <div class="list-group list-group-flush small">
             {% for p in g.posts %}
             <div class="list-group-item d-flex align-items-start">
-              <input class="form-check-input me-2" type="checkbox" name="ids" value="{{ p.id }}"
-                     id="cb-{{ p.id }}" style="vertical-align:middle;">
-              <form class="d-inline flex-grow-1" method="post" action="/candidates/select">
-                <input type="hidden" name="id" value="{{ p.id }}">
-                <input type="hidden" name="group_by" value="{{ group_by }}">
-                <input type="hidden" name="direction" value="{{ direction }}">
-                <input type="hidden" name="status" value="{{ status }}">
-                <input type="hidden" name="own" value="{{ own }}">
-                <input type="hidden" name="q" value="{{ q }}">
-                <button type="submit" class="btn btn-link p-0 text-start w-100 text-decoration-none
-                        {% if selected and selected.id == p.id %}fw-bold text-primary{% endif %}">
+              <a class="flex-grow-1 text-decoration-none{% if selected and selected.id == p.id %} fw-bold text-primary{% endif %}"
+                 href="/candidates?selected={{ p.id }}&group_by={{ group_by }}{% if filters_qs %}&{{ filters_qs }}{% endif %}">
                 <span class="d-block text-truncate">{{ (p.text or '')[:90] }}</span>
                 <span class="d-block text-muted">
                   {{ p.source_name }} · {{ (p.published_at or p.fetched_at) | dt }}
                   {% if p.is_own %} · ⭐{% endif %}
                   {% if p.direction %}<span class="badge bg-light">{{ p.direction }}</span>{% endif %}
                 </span>
-                </button>
-              </form>
+              </a>
+              <input class="form-check-input ms-auto mt-1" type="checkbox" name="ids" value="{{ p.id }}"
+                     form="bulk-form" {% if selected and selected.id == p.id %}checked{% endif %}>
             </div>
             {% endfor %}
           </div>
@@ -108,6 +94,25 @@
           <div class="alert alert-info py-2">Нет кандидатов по фильтру</div>
         {% endfor %}
       </div>
+
+      <form method="post" action="/candidates/bulk" id="bulk-form"
+            onsubmit="return confirm('Выполнить групповое действие над выбранными?')">
+        <input type="hidden" name="direction" value="{{ direction }}">
+        <input type="hidden" name="status" value="{{ status }}">
+        <input type="hidden" name="own" value="{{ own }}">
+        <input type="hidden" name="q" value="{{ q }}">
+        <input type="hidden" name="group_by" value="{{ group_by }}">
+        <div class="d-flex align-items-center gap-2 mt-2">
+          <select name="action" class="form-select form-select-sm" style="width:auto;">
+            <option value=""></option>
+            <option value="reject">🚫 Отклонить</option>
+            <option value="reject-old">🗑 Отклонить старьё</option>
+            <option value="approve">✅ Опубликовать</option>
+          </select>
+          <button class="btn btn-sm btn-primary" type="submit">Выполнить</button>
+        </div>
+      </form>
+    </div>
   </div>
 
   <div class="col-md-7">
@@ -188,6 +193,5 @@
       {% endif %}
     </div>
   </div>
-  </div>
-</form>
+</div>
 {% endblock %}