refactor: eliminate ~400 no-explicit-any warnings across the workspace

Parallel subagent pass: four typescript-pro agents on non-overlapping scopes.

Patterns applied:
- catch (err: any) { ... err.message ... } → catch (err) { ... getErrorMessage(err) ... }
  using the new @fusion/core helper. Bare catch {} where the error was unused.
- SQLite row types: defined typed XxxRow interfaces per table and cast
  .all()/.get() results via `as unknown as XxxRow[]` (the double cast is
  required because better-sqlite3 returns Record<string, SQLOutputValue>).
- rowToX(row: any) converters: typed argument with the matching row interface.
- Dynamic settings key writes: (settings as Record<string, unknown>)[key].
- React event handlers and setState callbacks: inferred types or concrete
  React.{Mouse,Change,Form}Event<...> where needed.
- pi-claude-cli: local PiMessage / PiContext duck types to avoid re-typing
  pi-ai concrete shapes; typed Claude stream event message fields.

72 files changed, ~400 anys eliminated. Typecheck passes across the workspace.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

packages/dashboard/app/components/NewTaskModal.tsx

@@ -1,5 +1,6 @@
 import { useState, useCallback, useEffect, useRef } from "react";
 import type { Task, TaskCreateInput } from "@fusion/core";
+import { getErrorMessage } from "@fusion/core";
 import type { ToastType } from "../hooks/useToast";
 import { uploadAttachment, fetchAgents } from "../api";
 import type { Agent } from "../api";
@@ -73,8 +74,9 @@ export function NewTaskModal({ isOpen, onClose, projectId, tasks, onCreateTask,
       const result = await fetchAgents(undefined, projectId);
       setAgents(result);
       setShowAgentPicker(true);
-    } catch (err: any) {
-      addToast(err?.message ? `Failed to load agents: ${err.message}` : "Failed to load agents", "error");
+    } catch (err) {
+      const msg = getErrorMessage(err);
+      addToast(msg ? `Failed to load agents: ${msg}` : "Failed to load agents", "error");
       setShowAgentPicker(false);
     } finally {
       setAgentsLoading(false);
@@ -237,8 +239,8 @@ export function NewTaskModal({ isOpen, onClose, projectId, tasks, onCreateTask,
 
       addToast(`Created ${task.id}`, "success");
       onClose();
-    } catch (err: any) {
-      addToast(err.message || "Failed to create task", "error");
+    } catch (err) {
+      addToast(getErrorMessage(err) || "Failed to create task", "error");
     } finally {
       setIsSubmitting(false);
     }