Phase 3C — Commit Summary

feat: workspaces — collaborative repo namespaces
Backend
- internal/models/workspace.go — Workspace (handle, displayName,
  description, createdBy) + WorkspaceMember (workspaceId, userId,
  username, role: owner/admin/member)
- internal/models/repo.go — added nullable workspace_id column; existing
  user repos unaffected
- internal/models/migrations/011_workspaces.go — syncs both tables +
  adds column to repository
- internal/api/handlers/workspace.go — ListWorkspaces, CreateWorkspace,
  GetWorkspace, UpdateWorkspace, DeleteWorkspace (blocks if repos
  remain), ListRepos, ListMembers, AddMember, UpdateMember, RemoveMember
- internal/api/handlers/repos.go — lookupRepo resolves workspace
  handles; Create accepts workspace field; List includes workspace
  member repos; withOwnerName uses workspace handle for workspace-owned
  repos
- internal/api/handlers/dashboard.go — recentRuns + repo list include
  workspace repos the user is a member of
- internal/api/router.go — /workspaces, /workspaces/:handle/* routes
  Workspace rules enforced:
- Handle globally unique across usernames + workspace handles (409 on
  collision)
- Creator auto-assigned owner role
- Delete blocked if repos exist
- Last owner cannot be demoted/removed
  ---
  feat: secret management hierarchy (Global → Workspace → Repo → Env)
  Backend
- internal/models/secret.go — Secret struct +
  EncryptSecret/DecryptSecret with AES-256-GCM (key = SHA-256 of
  SESSION_SECRET); values never serialised to JSON
- internal/models/migrations/012_secrets.go — syncs secret table
- internal/api/handlers/secret.go — List/Upsert/Delete for all four
  scopes; ResolveSecretsForRun builds merged env map for CI
- internal/domain/ci/executor.go — JobContext.Secrets field; secrets
  injected as --env KEY=VALUE into docker run; buildJobContext calls
  resolveSecrets(Global < Workspace < Repo < Env)
- internal/domain/ci/runner_manager.go — passes cfg.SessionSecret to
  buildJobContext
- internal/api/router.go — /repos/:owner/:repo/secrets,
  /environments/:envName/secrets, /workspaces/:handle/secrets,
  /admin/secrets
  ---
  feat: workspace + secret management UI
  Frontend
- types/api.ts — Workspace, WorkspaceWithMeta, WorkspaceMember,
  SecretListItem types
- api/queries/workspaces.ts — full CRUD hooks + WorkspaceRepo type
- api/queries/secrets.ts — repo/env/workspace secret hooks
- pages/WorkspacesPage.tsx — list + create modal
- pages/WorkspacePage.tsx — workspace dashboard with repo list
- pages/WorkspaceSettingsPage.tsx — general settings, members CRUD,
  workspace secrets, danger zone
- pages/RepoSecretsPage.tsx — repo secrets + per-environment secret
  sections with priority hierarchy callout
- pages/CreateRepoPage.tsx — ?workspace= query param pre-fills owner
  selector; only admin/owner workspaces shown
- components/layout/Sidebar.tsx — "Workspaces" global nav item +
  workspace quick-links; "Secrets" in RepoSubNav; new SecretsIcon,
  WorkspaceIcon
- App.tsx — routes for /workspaces, /workspaces/:handle,
  /workspaces/:handle/settings, /repos/:owner/:repo/secrets

internal/models/workspace.go

@@ -0,0 +1,36 @@
+package models
+
+import "time"
+
+// WorkspaceRole controls what a member can do inside a workspace.
+type WorkspaceRole string
+
+const (
+	WorkspaceRoleOwner  WorkspaceRole = "owner"
+	WorkspaceRoleAdmin  WorkspaceRole = "admin"
+	WorkspaceRoleMember WorkspaceRole = "member"
+)
+
+// Workspace is a named collaborative namespace that can own repositories.
+// Its handle must be globally unique across all usernames and workspace handles
+// so that /{owner}/{repo} URLs remain unambiguous.
+type Workspace struct {
+	ID          int64     `xorm:"'id' pk autoincr"                          json:"id"`
+	Handle      string    `xorm:"'handle' unique notnull varchar(64)"        json:"handle"`
+	DisplayName string    `xorm:"'display_name' varchar(255)"               json:"displayName"`
+	Description string    `xorm:"'description' text"                        json:"description"`
+	AvatarURL   string    `xorm:"'avatar_url' varchar(500)"                 json:"avatarUrl"`
+	CreatedBy   int64     `xorm:"'created_by' notnull"                      json:"createdBy"`
+	CreatedAt   time.Time `xorm:"'created_at' created"                      json:"createdAt"`
+	UpdatedAt   time.Time `xorm:"'updated_at' updated"                      json:"updatedAt"`
+}
+
+// WorkspaceMember links a User to a Workspace with a role.
+type WorkspaceMember struct {
+	ID          int64         `xorm:"'id' pk autoincr"              json:"id"`
+	WorkspaceID int64         `xorm:"'workspace_id' notnull index"  json:"workspaceId"`
+	UserID      int64         `xorm:"'user_id' notnull index"       json:"userId"`
+	Username    string        `xorm:"'username' varchar(64)"        json:"username"`
+	Role        WorkspaceRole `xorm:"'role' varchar(20)"            json:"role"`
+	AddedAt     time.Time     `xorm:"'added_at' created"            json:"addedAt"`
+}