refactor: unify declare block scanning between CLI and client

Introduce `scanDeclareBlocks` in `declare-parser.ts` to provide a
single source of truth for parsing `role=declare` blocks. This
replaces redundant scanning logic in both the CLI and the journal
completions.

Also remove unused `dice.ts` and `spark-scanner.ts` files.

src/cli/completions/declare-parser.ts

@@ -16,6 +16,56 @@
 
 import { parse } from "csv-parse/browser/esm/sync";
 
+// ---------------------------------------------------------------------------
+// Shared block scanning — used by both CLI (block-processor) and client
+// (completions.ts) so there's a single source of truth for declare parsing.
+// ---------------------------------------------------------------------------
+
+/** Matches fenced code blocks with an info string. */
+const FENCED_BLOCK_RE = /^```(\w*)\s+(\S.*?)\s*\n([\s\S]*?)```\s*$/gm;
+
+/** Parse key="value" and key=value pairs from an attribute string. */
+function parseBlockAttrs(info: string): Record<string, string> {
+  const attrs: Record<string, string> = {};
+  const re = /(\w+)\s*=\s*("[^"]*"|\S+)/g;
+  let m: RegExpExecArray | null;
+  while ((m = re.exec(info)) !== null) {
+    attrs[m[1]] = m[2].replace(/^"|"$/g, "");
+  }
+  return attrs;
+}
+
+/**
+ * Scan markdown content for ```csv role=declare blocks and return
+ * parsed declarations and tag modifiers. Shared between CLI and client.
+ */
+export function scanDeclareBlocks(content: string, filePath: string): DeclareResult {
+  const variables: VarDeclaration[] = [];
+  const tagModifiers: TagModifier[] = [];
+
+  FENCED_BLOCK_RE.lastIndex = 0;
+  let m: RegExpExecArray | null;
+  while ((m = FENCED_BLOCK_RE.exec(content)) !== null) {
+    const [, , infoString, body] = m;
+    const attrs = parseBlockAttrs(infoString);
+    if (attrs.role !== "declare") continue;
+
+    try {
+      const result = parseDeclareCsv(body, filePath);
+      variables.push(...result.variables);
+      tagModifiers.push(...result.tagModifiers);
+    } catch (e) {
+      console.warn(`[declare-parser] ${filePath}: ${e}`);
+    }
+  }
+
+  return { variables, tagModifiers };
+}
+
+// ---------------------------------------------------------------------------
+// Types
+// ---------------------------------------------------------------------------
+
 export interface VarDeclaration {
   key: string;        // "$hp" (always starts with $)
   expression: string; // "$con*5+$mod_hp"
@@ -33,7 +83,7 @@ export interface DeclareResult {
 }
 
 /**
- * Parse a ```csv role=declare block.
+ * Parse a single ```csv role=declare block body.
  */
 export function parseDeclareCsv(csv: string, source: string): DeclareResult {
   const trimmed = csv.trim();
@@ -92,4 +142,4 @@ export function parseDeclareCsv(csv: string, source: string): DeclareResult {
   }
 
   return { variables, tagModifiers };
-}
+}