feat: add admin panel, stats API, and url support across frontend

- Add adminApi with full CRUD for users, companies, listings, oil-prices
- Add statsApi for fetching latest market price aggregates
- Add AdminTable component and /admin page for site management
- Add StatsPrice, UpdateUserRequest, UpdateOilPriceRequest types
- Add url field support in listing create/edit forms
- Update state SVG data for all 6 New England states
- Update county page to display richer listing info (phone, url, bio%)
- Misc layout and style updates across vendor and public routes

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/lib/components/AdminTable.svelte

@@ -0,0 +1,100 @@
+<script lang="ts">
+    export let data: any[] = [];
+    export let columns: { key: string; label: string; type?: 'text' | 'number' | 'boolean' | 'date'; editable?: boolean }[] = [];
+    export let onSave: (item: any) => Promise<void>;
+    export let onDelete: (item: any) => Promise<void>;
+
+    let editingId: number | null = null;
+    let editValues: any = {};
+    let isSaving = false;
+    let isDeleting = false;
+
+    function startEdit(item: any) {
+        editingId = item.id;
+        editValues = { ...item };
+    }
+
+    async function save() {
+        if (!editingId) return;
+        isSaving = true;
+        try {
+            await onSave(editValues);
+            editingId = null;
+            editValues = {};
+        } catch (e) {
+            alert('Failed to save: ' + e);
+        } finally {
+            isSaving = false;
+        }
+    }
+
+    function cancel() {
+        editingId = null;
+        editValues = {};
+    }
+
+    async function handleDelete(item: any) {
+        if (confirm('Are you sure you want to delete this item?')) {
+            isDeleting = true;
+            try {
+                await onDelete(item);
+            } catch (e) {
+                alert('Failed to delete: ' + e);
+            } finally {
+                isDeleting = false;
+            }
+        }
+    }
+</script>
+
+<div class="overflow-x-auto">
+    <table class="table table-xs md:table-sm table-pin-rows">
+        <thead>
+            <tr>
+                {#each columns as col}
+                    <th>{col.label}</th>
+                {/each}
+                <th>Actions</th>
+            </tr>
+        </thead>
+        <tbody>
+            {#each data as item (item.id)}
+                {@const isEditing = editingId === item.id}
+                <tr class="hover">
+                    {#each columns as col}
+                        <td>
+                            {#if isEditing && col.editable}
+                                {#if col.type === 'boolean'}
+                                    <input type="checkbox" class="checkbox checkbox-sm" bind:checked={editValues[col.key]} />
+                                {:else if col.type === 'number'}
+                                    <input type="number" class="input input-bordered input-sm w-full" bind:value={editValues[col.key]} />
+                                {:else}
+                                    <input type="text" class="input input-bordered input-sm w-full" bind:value={editValues[col.key]} />
+                                {/if}
+                            {:else}
+                                {#if col.type === 'boolean'}
+                                    <input type="checkbox" class="checkbox checkbox-xs" checked={item[col.key]} disabled />
+                                {:else}
+                                    <div class="truncate max-w-[200px]" title={item[col.key]}>
+                                        {item[col.key] ?? ''}
+                                    </div>
+                                {/if}
+                            {/if}
+                        </td>
+                    {/each}
+                    <td class="flex gap-2">
+                        {#if isEditing}
+                            <button class="btn btn-xs btn-success" on:click={save} disabled={isSaving}>
+                                {#if isSaving}Saving...{:else}Save{/if}
+                            </button>
+                            <button class="btn btn-xs btn-ghost" on:click={cancel} disabled={isSaving}>Cancel</button>
+                        {:else}
+                            <button class="btn btn-xs btn-primary" on:click={() => startEdit(item)}>Edit</button>
+                            <button class="btn btn-xs btn-error" on:click={() => handleDelete(item)} disabled={isDeleting}>Delete</button>
+                        {/if}
+                    </td>
+                </tr>
+            {/each}
+        </tbody>
+    </table>
+</div>