feat: driver rename, driver icons, web image + driver search

Driver rename and icons: `Driver.display_name` plus a `DriverIcon` table, both
global/shared like the `Driver` row they hang off, so a rename or an icon is
what every Owner sees. The rename/icon dialog keeps its forms as siblings
(nested forms are invalid HTML) and the icon routes return an `hx-swap-oob`
thumbnail refresh rather than re-rendering the table, which would tear the open
`<dialog>` out of the DOM.

Web image picker: `GET /web/images` renders a pickable grid for a printer or a
driver icon, with the search term prefilled from the entity name and editable.
Picking one downloads it server-side and normalizes it.

Driver download search: `GET /web/drivers` searches for a vendor-wide driver
(the term is rewritten into the vendor's real product name for 15 brands) or for
the exact model as typed. Links only — nothing is downloaded, and the fragment
says the results are unvetted.

Icon uploads no longer reject off-size or non-PNG files: `normalize_icon()`
letterboxes any decodable raster into a 256x256 PNG. An already-exact 256x256
PNG is returned byte-identical, because icon storage is content-addressed and
re-encoding would move the file on every save.

`fetch_image()` makes the request from the server, so `assert_fetchable()`
refuses any URL resolving to a private, loopback, or link-local address, and
re-runs on every redirect. ImpTune sits on the same LAN as the printers it
configures; an unguarded fetcher would be a port scanner for anyone who can
reach the UI.

DuckDuckGo is scraped, not called through an API — no key needed, but fragile,
so both search functions swallow parse failures and return [] instead of 500ing
a page. `WEB_SEARCH=false` disables every outbound request and hides the
controls, for air-gapped installs.

Also: one shared `Jinja2Templates` in `templating.py` instead of five per-router
instances, so a template global is declared once; `_add_missing_columns()` in
`database.py` adds new nullable columns to a pre-existing table, which
`create_tables(safe=True)` skips; `db_env` in test_db.py now closes its
connection on teardown, or the next test's ORM writes land in the previous
test's DB file.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

imptune/templates/partials/driver_edit_modal.html

@@ -0,0 +1,109 @@
+{#
+  Rename + icon dialog for one driver row. `item` is a build_driver_data() entry.
+
+  The rename form and the icon forms are siblings, not nested — a form inside a
+  form is invalid HTML and the browser drops the inner one. The footer's Save
+  reaches the rename form through `form="..."`.
+
+  Trigger is located by `button[onclick*='showModal']` in E2E specs, never by its
+  label: the default language follows navigator.language.
+#}
+{% import "partials/icons.html" as ico %}
+{% set d = item.driver %}
+<button class="btn ghost sm"
+        onclick="document.getElementById('driver-modal-{{ d.id }}').showModal()"
+        x-data>
+  {{ ico.i('pencil', 14) }}<span x-text="$store.i18n.t('edit')">Edit</span>
+</button>
+
+<dialog id="driver-modal-{{ d.id }}">
+  <article>
+    <div class="dialog-head">
+      <h3 x-data x-text="$store.i18n.t('edit_driver_title')">Edit driver</h3>
+      <button type="button" class="icon-btn close" x-data
+              :aria-label="$store.i18n.t('cancel')"
+              onclick="document.getElementById('driver-modal-{{ d.id }}').close()">&times;</button>
+    </div>
+
+    <div class="dialog-body">
+      <form id="driver-rename-{{ d.id }}"
+            hx-patch="/drivers/{{ d.id }}"
+            hx-target="#driver-list"
+            hx-swap="outerHTML"
+            hx-on::after-request="document.getElementById('driver-modal-{{ d.id }}').close()">
+        <fieldset class="form-section">
+          <legend x-data x-text="$store.i18n.t('section_driver_name')">Name</legend>
+          <label>
+            <span class="label-text" x-data x-text="$store.i18n.t('driver_display_name')">Display name</span>
+            <input type="text" name="display_name" maxlength="120"
+                   value="{{ d.display_name or '' }}"
+                   placeholder="{{ d.original_filename }}">
+          </label>
+          <span class="hint" x-data x-text="$store.i18n.t('hint_driver_rename')">Shared with everyone — the driver library is global. Leave empty to show the ZIP filename.</span>
+        </fieldset>
+      </form>
+
+      <fieldset class="form-section">
+        <legend x-data x-text="$store.i18n.t('icon_section')">Icon</legend>
+        <div id="driver-icon-status-{{ d.id }}">
+          {% if item.has_icon %}
+          <div class="icon-preview">
+            <img src="/drivers/{{ d.id }}/icon" width="56" height="56" alt="">
+            <span class="meta">256&times;256 PNG</span>
+          </div>
+          {% else %}
+          <p class="dim" x-data x-text="$store.i18n.t('no_driver_icon')">No icon yet.</p>
+          {% endif %}
+        </div>
+
+        <form hx-post="/drivers/{{ d.id }}/icon"
+              hx-target="#driver-icon-status-{{ d.id }}"
+              hx-swap="innerHTML"
+              hx-encoding="multipart/form-data">
+          <div class="uploader">
+            <input type="file" name="file" accept="image/*" required
+                   x-data :aria-label="$store.i18n.t('upload_icon')">
+            <div class="btn-row">
+              <button type="submit" class="btn ghost sm" x-data>
+                {{ ico.i('upload', 13) }}<span x-text="$store.i18n.t('upload_icon')">Upload icon</span>
+              </button>
+            </div>
+            <p class="hint" x-data x-text="$store.i18n.t('hint_any_image')">Any image — resized to 256 × 256 PNG. 750 KB max.</p>
+          </div>
+        </form>
+
+        {% if web_search_enabled() %}
+        <div class="web-picker">
+          <form hx-get="/web/images"
+                hx-target="#driver-image-results-{{ d.id }}"
+                hx-swap="innerHTML"
+                hx-indicator="#driver-image-spinner-{{ d.id }}">
+            <input type="hidden" name="target" value="driver">
+            <input type="hidden" name="id" value="{{ d.id }}">
+            <label>
+              <span class="label-text" x-data x-text="$store.i18n.t('search_web_image')">Search the web for an image</span>
+              <input type="search" name="q" value="{{ item.image_query }}">
+            </label>
+            <div class="btn-row">
+              <button type="submit" class="btn ghost sm" x-data>
+                {{ ico.i('search', 13) }}<span x-text="$store.i18n.t('search_btn')">Search</span>
+              </button>
+              <span id="driver-image-spinner-{{ d.id }}" class="htmx-indicator" aria-busy="true"
+                    x-data x-text="$store.i18n.t('searching')">Searching…</span>
+            </div>
+          </form>
+          <div id="driver-image-results-{{ d.id }}"></div>
+        </div>
+        {% endif %}
+      </fieldset>
+    </div>
+
+    <div class="dialog-foot">
+      <button type="button" class="btn ghost" x-data
+              onclick="document.getElementById('driver-modal-{{ d.id }}').close()"
+              x-text="$store.i18n.t('cancel')">Cancel</button>
+      <button type="submit" class="btn" form="driver-rename-{{ d.id }}" x-data
+              x-text="$store.i18n.t('save')">Save</button>
+    </div>
+  </article>
+</dialog>

imptune/templates/partials/driver_list.html

@@ -30,17 +30,34 @@
             <th class="col-arch" x-data x-text="$store.i18n.t('architecture')">Architecture</th>
             <th class="col-used" x-data x-text="$store.i18n.t('th_used_by')">Used by</th>
             <th class="col-added" x-data x-text="$store.i18n.t('uploaded_at')">Added</th>
+            <th class="col-actions"><span x-data x-text="$store.i18n.t('th_actions')">Actions</span></th>
           </tr>
         </thead>
         <tbody>
           {% for item in driver_data %}
           <tr>
             <td>
-              <span class="cell-name mono">{{ item.driver.original_filename }}</span>
-              <span class="cell-sub">
-                {% if item.driver.size_bytes >= 1048576 %}{{ (item.driver.size_bytes / 1048576) | round(1) }} MB{% elif item.driver.size_bytes >= 1024 %}{{ (item.driver.size_bytes / 1024) | round(0) | int }} KB{% else %}{{ item.driver.size_bytes }} B{% endif %}
-                {% if item.driver.inf_filename %} &middot; {{ item.driver.inf_filename }}{% endif %}
-              </span>
+              <div class="cell-with-thumb">
+                {# Placeholder span keeps the id addressable so an icon saved in
+                   the dialog can be swapped in out of band. #}
+                <span id="driver-thumb-{{ item.driver.id }}" class="driver-thumb">
+                  {% if item.has_icon %}
+                  <img src="/drivers/{{ item.driver.id }}/icon" width="24" height="24" alt="">
+                  {% endif %}
+                </span>
+                <span>
+                  {% if item.driver.display_name %}
+                  <span class="cell-name">{{ item.driver.display_name }}</span>
+                  <span class="cell-sub mono">{{ item.driver.original_filename }}</span>
+                  {% else %}
+                  <span class="cell-name mono">{{ item.driver.original_filename }}</span>
+                  {% endif %}
+                  <span class="cell-sub">
+                    {% if item.driver.size_bytes >= 1048576 %}{{ (item.driver.size_bytes / 1048576) | round(1) }} MB{% elif item.driver.size_bytes >= 1024 %}{{ (item.driver.size_bytes / 1024) | round(0) | int }} KB{% else %}{{ item.driver.size_bytes }} B{% endif %}
+                    {% if item.driver.inf_filename %} &middot; {{ item.driver.inf_filename }}{% endif %}
+                  </span>
+                </span>
+              </div>
             </td>
             <td>
               {% if item.names %}
@@ -77,6 +94,9 @@
               <span class="badge ok">{{ ico.i('check', 12) }}new</span>
               {% endif %}
             </td>
+            <td class="actions col-actions">
+              {% include "partials/driver_edit_modal.html" %}
+            </td>
           </tr>
           {% endfor %}
         </tbody>

imptune/templates/partials/driver_search_results.html

@@ -0,0 +1,29 @@
+{#
+  Driver download search results — links only. ImpTune never downloads a driver
+  for you: these are raw web results, and the warning below says so plainly.
+#}
+{% if hits %}
+<p class="hint">
+  <span x-data x-text="$store.i18n.t('searched_for')">Searched for</span>
+  <span class="mono">{{ query }}</span>
+</p>
+
+<div class="notice warn">
+  <p x-data x-text="$store.i18n.t('driver_search_warning')">
+    Unfiltered web results, not a vetted list. Download drivers only from the
+    manufacturer's own site, then upload the ZIP above.
+  </p>
+</div>
+
+<ul class="link-list">
+  {% for h in hits %}
+  <li>
+    <a href="{{ h.url }}" target="_blank" rel="noopener noreferrer nofollow">{{ h.title }}</a>
+    <span class="cell-sub mono">{{ h.host }}</span>
+    {% if h.snippet %}<p class="dim">{{ h.snippet }}</p>{% endif %}
+  </li>
+  {% endfor %}
+</ul>
+{% else %}
+<p class="dim" x-data x-text="$store.i18n.t('no_driver_results')">No results. Try the exact model name instead.</p>
+{% endif %}

imptune/templates/partials/image_results.html

@@ -0,0 +1,30 @@
+{#
+  Web image picker. Each result is a button that POSTs its URL to `post_url`;
+  the server downloads and normalizes it, then returns the icon-status block
+  that `status_target` points at.
+
+  Thumbnails load straight from the search engine's CDN, so the browser talks
+  to it directly — `referrerpolicy` keeps ImpTune's own URL out of that request.
+#}
+{% if hits %}
+<p class="hint">
+  <span x-data x-text="$store.i18n.t('image_results_for')">Results for</span>
+  <span class="mono">{{ query }}</span>
+</p>
+<div class="image-grid">
+  {% for h in hits %}
+  <button type="button" class="image-option"
+          hx-post="{{ post_url }}"
+          hx-vals='{{ {"url": h.url} | tojson }}'
+          hx-target="{{ status_target }}"
+          hx-swap="innerHTML"
+          title="{{ h.title }} — {{ h.source }}">
+    <img src="{{ h.thumbnail }}" alt="" loading="lazy" referrerpolicy="no-referrer">
+    <span class="image-meta mono">{{ h.width }}&times;{{ h.height }}</span>
+  </button>
+  {% endfor %}
+</div>
+<p class="hint" x-data x-text="$store.i18n.t('image_pick_hint')">Pick one — it is downloaded and resized to 256 × 256 PNG.</p>
+{% else %}
+<p class="dim" x-data x-text="$store.i18n.t('no_image_results')">No results. Try another search term.</p>
+{% endif %}