feat: rewrite image picker (#6556)

* feat: rewrite image picker

* style: auto-fix lint and format

* fix: address image picker review

* fix: preserve unicode icon searches

* test: stabilize custom widget login

* fix: suggest image searches only on create

apps/docs/docs/advanced/icons/index.mdx

@@ -9,17 +9,19 @@ tags:
 ---
 
 ## Icon picker
+
 Icons in Homarr are automatically requested from multiple sources:
-  - [Dashboard Icons](https://dashboardicons.com/) - Our recommended source with over 1888+ curated, high-quality icons
-  - [selfh.st icons](https://github.com/selfhst/icons)
-  - [Simple icons](https://github.com/simple-icons/simple-icons)
-  - [Tabler icons](https://tabler-icons.io/)
-  - [Papirus icons](https://github.com/PapirusDevelopmentTeam/papirus-icon-theme)
-  - [Homelab Svg assets](https://github.com/loganmarchione/homelab-svg-assets)
-  - **Local icons**: automatically fetched from the [medias feature](/docs/management/media/)
+
+- [Dashboard Icons](https://dashboardicons.com/) - Our recommended source with more than 1,888 curated, high-quality icons
+- [selfh.st icons](https://github.com/selfhst/icons)
+- [Simple icons](https://github.com/simple-icons/simple-icons)
+- [Tabler icons](https://tabler-icons.io/)
+- [Papirus icons](https://github.com/PapirusDevelopmentTeam/papirus-icon-theme)
+- [Homelab Svg assets](https://github.com/loganmarchione/homelab-svg-assets)
+- **Local icons**: automatically fetched from the [medias feature](/docs/management/media/)
 
 Using these icon sources, Homarr provides a total collection of over 11,000 icons at your fingertips.
-The icon picker is a fast searcher that helps you to find your desired icon simply by entering a search term.
+The image picker searches this collection after a short typing delay. When a name is available, such as an app or search engine name, the picker uses it as the initial search. Results show your locally uploaded images first, followed by SVG icons and then other image formats.
 
 ### Finding Missing Icons
 
@@ -29,6 +31,13 @@ If you can't find the icon you're looking for in Homarr's built-in picker, we st
 
 Icons that are high quality and printable ([SVG](https://wikipedia.org/wiki/Scalable_Vector_Graphics)) are marked with a red badge "SVG" at the top right.
 
+You can clear the selected image with the clear button or the usual keyboard shortcut for deleting a line (Command+Backspace on macOS or Control+Backspace on other platforms). Clearing the field does not restore the previous image.
+
 ### Using external icons
+
 If you don't find the icon you're looking for on Dashboard Icons or wish to use a different source, you can simply enter a URL that points to an icon.
-Direct HTTP(S) image URLs are used as entered instead of being searched in the built-in repositories. It is important that the URL directly points to the file without any advertisements or elements around it.
+Direct HTTP(S) image URLs are used as entered instead of being searched in the built-in repositories. The picker previews the image and shows whether it loaded successfully. It is important that the URL directly points to the file without any advertisements or elements around it.
+
+### Uploading a local image
+
+Users with media upload permission can select **Upload image** next to the field. After the upload finishes, the new local image is selected immediately and is available at the top of future searches.

apps/docs/docs/management/apps/index.mdx

@@ -28,7 +28,7 @@ The name must be at least one character long and can be chosen freely.
 ### Icon URL
 
 This is the URL to the icon that will be displayed on the app widget.
-You can paste a direct HTTP(S) URL to an image, search the included icon repositories by name, or upload a local file through the upload button. Direct image URLs are used as entered and are not searched in the icon repositories.
+You can paste a direct HTTP(S) URL to an image, search the included icon repositories by name, or upload a local file through the upload button. The app name is pre-filled as the initial library search when no image is selected. Local images appear first, followed by SVG icons and other formats. Direct image URLs are previewed, used as entered, and are not searched in the icon repositories.
 
 ![Icon URL](./img/app-icon-url.png)
 

apps/nextjs/src/app/[locale]/manage/custom-widgets/_custom-widget-form.tsx

@@ -697,7 +697,11 @@ export function CustomWidgetForm({ mode, initialValues, definitionId }: CustomWi
             <Stack gap="sm">
               <TextInput label={t("field.name")} required {...form.getInputProps("name")} />
               <Textarea label={t("field.description")} {...form.getInputProps("description")} />
-              <IconPicker withAsterisk={false} {...form.getInputProps("iconUrl")} />
+              <IconPicker
+                withAsterisk={false}
+                suggestedSearch={mode === "create" ? form.values.name : undefined}
+                {...form.getInputProps("iconUrl")}
+              />
             </Stack>
           </Fieldset>
 

apps/nextjs/src/app/[locale]/manage/search-engines/_form.tsx

@@ -57,7 +57,10 @@ export const SearchEngineForm = (props: SearchEngineFormProps) => {
             />
           </Grid.Col>
         </Grid>
-        <IconPicker {...form.getInputProps("iconUrl")} />
+        <IconPicker
+          {...form.getInputProps("iconUrl")}
+          suggestedSearch={initialValues === undefined ? form.values.name : undefined}
+        />
 
         <Fieldset legend={t("search.engine.page.edit.configControl")}>
           <SegmentedControl