Centralize all path management via src/config/paths.ts

- Add getPaths() with workspace, scripts, ppt skin/template paths
- Export getWorkspacePath(args?) helper — removes duplicate local functions
  and stale process.cwd()/workspace fallbacks from sqlite, pdf, excel,
  image, pubmed, email, audio-transcribe (7 files)
- weather.ts: replace __dirname-relative scripts path with getPaths().scripts
- Move ppt/ to .smallclaw/skills/presenter/ppt/; update server-v2.ts,
  pptx.ts, pptx_gen.py (argparse --skin-dir/--template-dir)
- Fix PPT skin thumbnail serving: res.sendFile → fs.createReadStream
  (bypasses send module dotfiles restriction for .smallclaw/ paths)
- Fix workspace default: .smallclaw/workspace (was project root workspace/)
- Fix subagent paths to use SMALLCLAW_DATA_DIR env var
- Fix Monaco marked module load failure: restore define.amd on
  DOMContentLoaded after deferred UMD libs (tone, magenta) have loaded
- Add AudioContext resume on first user click (Chrome autoplay policy)

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

src/tools/email.ts

@@ -2,6 +2,7 @@ import fs from 'fs';
 import path from 'path';
 import { ToolResult } from '../types.js';
 import { getConfig } from '../config/config.js';
+import { getWorkspacePath } from '../config/paths.js';
 
 // ── Config ────────────────────────────────────────────────────────────────────
 
@@ -333,7 +334,7 @@ export const emailReadTool = {
                 resolvedWorkspacePath = path.resolve(String(injectedWorkspace));
               } else {
                 const cfg = getConfig().getConfig();
-                resolvedWorkspacePath = path.resolve(cfg?.workspace?.path || path.join(process.cwd(), 'workspace'));
+                resolvedWorkspacePath = path.resolve(getWorkspacePath(args));
               }
               const relDir = path.join('attachments', `uid-${uid}`);
               const saveDir = path.join(resolvedWorkspacePath, relDir);