feat: add PDF analysis tool with native provider support (#31319)

* feat: add PDF analysis tool with native provider support

New `pdf` tool for analyzing PDF documents with model-powered analysis.

Architecture:
- Native PDF path: sends raw PDF bytes directly to providers that support
  inline document input (Anthropic via DocumentBlockParam, Google Gemini
  via inlineData with application/pdf MIME type)
- Extraction fallback: for providers without native PDF support, extracts
  text via pdfjs-dist and rasterizes pages to images via @napi-rs/canvas,
  then sends through the standard vision/text completion path

Key features:
- Single PDF (`pdf` param) or multiple PDFs (`pdfs` array, up to 10)
- Page range selection (`pages` param, e.g. "1-5", "1,3,7-9")
- Model override (`model` param) and file size limits (`maxBytesMb`)
- Auto-detects provider capability and falls back gracefully
- Same security patterns as image tool (SSRF guards, sandbox support,
  local path roots, workspace-only policy)

Config (agents.defaults):
- pdfModel: primary/fallbacks (defaults to imageModel, then session model)
- pdfMaxBytesMb: max PDF file size (default: 10)
- pdfMaxPages: max pages to process (default: 20)

Model catalog:
- Extended ModelInputType to include "document" alongside "text"/"image"
- Added modelSupportsDocument() capability check

Files:
- src/agents/tools/pdf-tool.ts - main tool factory
- src/agents/tools/pdf-tool.helpers.ts - helpers (page range, config, etc.)
- src/agents/tools/pdf-native-providers.ts - direct API calls for Anthropic/Google
- src/agents/tools/pdf-tool.test.ts - 43 tests covering all paths
- Modified: model-catalog.ts, openclaw-tools.ts, config schema/types/labels/help

* fix: prepare pdf tool for merge (#31319) (thanks @tyler6204)

src/agents/openclaw-tools.ts

@@ -13,6 +13,7 @@ import { createGatewayTool } from "./tools/gateway-tool.js";
 import { createImageTool } from "./tools/image-tool.js";
 import { createMessageTool } from "./tools/message-tool.js";
 import { createNodesTool } from "./tools/nodes-tool.js";
+import { createPdfTool } from "./tools/pdf-tool.js";
 import { createSessionStatusTool } from "./tools/session-status-tool.js";
 import { createSessionsHistoryTool } from "./tools/sessions-history-tool.js";
 import { createSessionsListTool } from "./tools/sessions-list-tool.js";
@@ -84,6 +85,18 @@ export function createOpenClawTools(options?: {
         modelHasVision: options?.modelHasVision,
       })
     : null;
+  const pdfTool = options?.agentDir?.trim()
+    ? createPdfTool({
+        config: options?.config,
+        agentDir: options.agentDir,
+        workspaceDir,
+        sandbox:
+          options?.sandboxRoot && options?.sandboxFsBridge
+            ? { root: options.sandboxRoot, bridge: options.sandboxFsBridge }
+            : undefined,
+        fsPolicy: options?.fsPolicy,
+      })
+    : null;
   const webSearchTool = createWebSearchTool({
     config: options?.config,
     sandboxed: options?.sandboxed,
@@ -173,6 +186,7 @@ export function createOpenClawTools(options?: {
     ...(webSearchTool ? [webSearchTool] : []),
     ...(webFetchTool ? [webFetchTool] : []),
     ...(imageTool ? [imageTool] : []),
+    ...(pdfTool ? [pdfTool] : []),
   ];
 
   const pluginTools = resolvePluginTools({