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/hooks/useUsageData.ts

@@ -1,4 +1,5 @@
 import { useState, useEffect, useCallback, useRef } from "react";
+import { getErrorMessage } from "@fusion/core";
 import { fetchUsageData, type ProviderUsage } from "../api";
 
 interface UsageDataState {
@@ -57,14 +58,14 @@ export function useUsageData(options: UseUsageDataOptions = {}) {
         error: null,
         lastUpdated: new Date(),
       });
-    } catch (err: any) {
+    } catch (err) {
       // Don't update state if the request was aborted
-      if (err.name === "AbortError") return;
+      if (err instanceof Error && err.name === "AbortError") return;
 
       setState((prev) => ({
         ...prev,
         loading: false,
-        error: err.message || "Failed to fetch usage data",
+        error: getErrorMessage(err) || "Failed to fetch usage data",
       }));
     }
   }, []);