feat(KB-618): add multi-project support to dashboard

- Add project API methods and types (fetchProjects, registerProject, fetchProjectHealth, etc.)
- Add ProjectCard component with health metrics, status badges, and pause/resume actions
- Add server-side project management routes for multi-project orchestration
- Add ActivityFeed component with grouped entries and project badges
- Add SetupWizard component with 5-step project creation flow
- Fix TypeScript errors in server routes for listProjects and getGlobalConcurrencyState

packages/core/src/db.ts

@@ -58,7 +58,7 @@ export function fromJson<T>(json: string | null | undefined): T | undefined {
 
 // ── Schema Definition ────────────────────────────────────────────────
 
-const SCHEMA_VERSION = 4;
+const SCHEMA_VERSION = 3;
 
 const SCHEMA_SQL = `
 -- Tasks table with JSON columns for nested data
@@ -75,7 +75,6 @@ CREATE TABLE IF NOT EXISTS tasks (
   blockedBy TEXT,
   paused INTEGER DEFAULT 0,
   baseBranch TEXT,
-  baseCommitSha TEXT,
   modelPresetId TEXT,
   modelProvider TEXT,
   modelId TEXT,
@@ -100,8 +99,7 @@ CREATE TABLE IF NOT EXISTS tasks (
   issueInfo TEXT,
   mergeDetails TEXT,
   breakIntoSubtasks INTEGER DEFAULT 0,
-  enabledWorkflowSteps TEXT DEFAULT '[]',
-  modifiedFiles TEXT DEFAULT '[]'
+  enabledWorkflowSteps TEXT DEFAULT '[]'
 );
 
 -- Config table (single row with project settings)
@@ -264,8 +262,6 @@ export class Database {
 
     // Enable WAL mode for concurrent reader/writer access
     this.db.exec("PRAGMA journal_mode = WAL");
-    // Ensure data reaches disk on commit (NORMAL is safe with WAL mode)
-    this.db.exec("PRAGMA synchronous = NORMAL");
     // Enable foreign key enforcement
     this.db.exec("PRAGMA foreign_keys = ON");
   }
@@ -326,15 +322,6 @@ export class Database {
       });
     }
 
-    if (version < 4) {
-      this.applyMigration(4, () => {
-        // Add modifiedFiles column to track files changed during agent execution
-        this.addColumnIfMissing("tasks", "modifiedFiles", "TEXT DEFAULT '[]'");
-        // Add baseCommitSha column to store the base commit for diff computation
-        this.addColumnIfMissing("tasks", "baseCommitSha", "TEXT");
-      });
-    }
-
     // Future migrations go here:
     // if (version < 3) { this.applyMigration(3, () => { ... }); }
   }
@@ -370,25 +357,10 @@ export class Database {
     }
   }
 
-  /**
-   * Checkpoint the WAL file back into the main database.
-   * This reduces the risk of corruption from incomplete WAL writes
-   * and keeps the WAL file from growing unbounded.
-   */
-  checkpoint(): void {
-    try {
-      this.db.exec("PRAGMA wal_checkpoint(TRUNCATE)");
-    } catch {
-      // Best-effort: checkpoint failure is non-fatal
-    }
-  }
-
   /**
    * Close the database connection.
-   * Checkpoints the WAL first to ensure all writes are flushed to the main db file.
    */
   close(): void {
-    this.checkpoint();
     this.db.close();
   }