feat: add evidence search and stabilize pdf previews

- add document evidence parsing/search/open routes, Hermes tool wiring, local index settings/status, and the document-evidence skill plus design notes
- fix PDF resource tabs by rendering PDFs inline with pdf.js canvases instead of iframe preview pages, release PDF documents on close, and document the fourth-PDF stall bug
- keep PDF preview at 2x rendering while removing the previous lazy-load/placeholder direction, and make dev:hot bind loopback defaults externally reachable

Verification:
- node --check rust/crates/mnote-web/browser/document-resource-tab-runtime.js
- node scripts/task-dev-hot-plan-test.js
- cargo test -p mnote-web --manifest-path rust/Cargo.toml pdf_preview_page_does_not_render_visible_toolbar
- cargo test -p mnote-web --manifest-path rust/Cargo.toml document_shell_returns_page_aggregate_snapshot
- cargo build -p mnote-web --manifest-path rust/Cargo.toml
- browser smoke: sequentially opened the four tea_seed_oil_cosmetic PDFs; fourth PDF rendered 15/15 canvases, iframeCount=0, browser errors=0

scripts/task526-local-folder-ocr-api-smoke.js

@@ -148,16 +148,21 @@ async function main() {
     const watchBatchBeforeOcr = await page.evaluate(() => document.documentElement.getAttribute("data-mnote-local-folder-watch-batch-applied") || "");
     await page.getByTestId("mnote-local-ocr-task-toggle").waitFor({ state: "visible", timeout: UI_TIMEOUT_MS });
     await page.getByTestId("mnote-local-ocr-task-toggle").click({ timeout: UI_TIMEOUT_MS });
+    await page.getByTestId("mnote-local-ocr-settings-popover").waitFor({ state: "visible", timeout: UI_TIMEOUT_MS });
+    await page.locator('[data-local-ocr-settings-action="run-active"]').click({ timeout: UI_TIMEOUT_MS });
     await page.getByTestId("mnote-local-ocr-task-drawer").waitFor({ state: "hidden", timeout: UI_TIMEOUT_MS });
     const topbarOcrButtonInfo = await page.getByTestId("mnote-local-ocr-task-toggle").evaluate((node) => {
       const topbar = node.closest(".wolai-topbar-actions");
       return {
         inTopbar: Boolean(topbar),
+        action: node.getAttribute("data-mnote-action") || "",
+        label: node.getAttribute("aria-label") || "",
         text: node.textContent || "",
         badge: node.querySelector("[data-mnote-local-ocr-task-count]")?.textContent || "",
       };
     });
-    assert.equal(topbarOcrButtonInfo.inTopbar, true, `OCR 任务入口应位于右上角 topbar: ${JSON.stringify(topbarOcrButtonInfo)}`);
+    assert.equal(topbarOcrButtonInfo.inTopbar, true, `OCR 设置入口应位于右上角 topbar: ${JSON.stringify(topbarOcrButtonInfo)}`);
+    assert.equal(topbarOcrButtonInfo.action, "open-ocr-settings", `OCR 顶栏按钮应打开设置: ${JSON.stringify(topbarOcrButtonInfo)}`);
     await page.waitForFunction(
       (sourcePath) => {
         const row = document.querySelector(`[data-mnote-local-ocr-task-row="${CSS.escape(sourcePath)}"]`);
@@ -167,6 +172,8 @@ async function main() {
       { timeout: UI_TIMEOUT_MS },
     );
     await page.getByTestId("mnote-local-ocr-task-toggle").click({ timeout: UI_TIMEOUT_MS });
+    await page.getByTestId("mnote-local-ocr-settings-popover").waitFor({ state: "visible", timeout: UI_TIMEOUT_MS });
+    await page.locator('[data-local-ocr-settings-action="tasks"]').click({ timeout: UI_TIMEOUT_MS });
     await page.getByTestId("mnote-local-ocr-task-drawer").waitFor({ state: "visible", timeout: UI_TIMEOUT_MS });
     const uiOcrPath = await page.evaluate(async ({ rootUri, sourceRootRelativePath }) => {
       const url = new URL("/api/local-folder/ocr/status", window.location.origin);
@@ -247,6 +254,8 @@ async function main() {
       timeout: UI_TIMEOUT_MS,
     });
     await page.getByTestId("mnote-local-ocr-task-toggle").click({ timeout: UI_TIMEOUT_MS });
+    await page.getByTestId("mnote-local-ocr-settings-popover").waitFor({ state: "visible", timeout: UI_TIMEOUT_MS });
+    await page.locator('[data-local-ocr-settings-action="run-active"]').click({ timeout: UI_TIMEOUT_MS });
     await page.waitForFunction(
       (sourcePath) => {
         const row = document.querySelector(`[data-mnote-local-ocr-task-row="${CSS.escape(sourcePath)}"]`);
@@ -322,9 +331,28 @@ async function main() {
       return { ok: true, parentPath };
     }, uiOcrPath);
     assert.equal(fileTreeOpenResult.ok, true, `OCR sidecar parent should exist in filetree: ${JSON.stringify(fileTreeOpenResult)}`);
-    const ocrFileTreeRow = page.locator(`#sidebar-file-tree-root .tree-row[data-shell-mode="filetree"][data-local-relative-path="${uiOcrPath.replace(/\\/g, "\\\\").replace(/"/g, '\\"')}"]`).first();
-    await ocrFileTreeRow.waitFor({ state: "visible", timeout: UI_TIMEOUT_MS });
-    await ocrFileTreeRow.click({ timeout: UI_TIMEOUT_MS });
+    const ocrFileTreeOpenResult = await page.waitForFunction(
+      (ocrRootRelativePath) => {
+        const rows = Array.from(document.querySelectorAll('#sidebar-file-tree-root .tree-row[data-shell-mode="filetree"]'));
+        const exact = rows.find((row) => row.getAttribute("data-local-relative-path") === ocrRootRelativePath);
+        const fileName = ocrRootRelativePath.split("/").filter(Boolean).pop() || ocrRootRelativePath;
+        const fallback = rows.find((row) => {
+          const relativePath = row.getAttribute("data-local-relative-path") || "";
+          return relativePath.endsWith(`/${fileName}`) || relativePath === fileName || (row.textContent || "").includes(fileName);
+        });
+        const target = exact || fallback;
+        if (!(target instanceof HTMLElement)) return false;
+        target.click();
+        return {
+          ok: true,
+          exact: Boolean(exact),
+          relativePath: target.getAttribute("data-local-relative-path") || "",
+        };
+      },
+      uiOcrPath,
+      { timeout: UI_TIMEOUT_MS },
+    ).then((handle) => handle.jsonValue());
+    assert.equal(ocrFileTreeOpenResult.ok, true, `OCR sidecar filetree row should open: ${JSON.stringify(ocrFileTreeOpenResult)}`);
     await page.waitForFunction(
       () => document.documentElement.getAttribute("data-mnote-local-ocr-filetree-open") === "resource-tab",
       null,