refactor: extract CSS modules for terminal and git components (Task 2.2)

- Create TerminalComponent.module.css with terminal-* styles
- Create GitToolbar.module.css with git toolbar styles
- Create CommitDialog.module.css with commit dialog styles
- Create MergeDialog.module.css with merge dialog styles
- Create FileEditor.module.css with file editor styles
- Update all components to import their CSS modules
- Remove extracted rules from styles.css (~441 lines removed)

Quality gates: tsc (pass), eslint (pass), build (pass)
Refs: repo-restructure Task 2.2

apps/web/src/components/features/terminal/TerminalComponent.module.css

@@ -0,0 +1,142 @@
+.terminalWrapper {
+  position: relative;
+  display: flex;
+  flex-direction: column;
+  flex: 1;
+  min-height: 0;
+  border: 1px solid var(--border);
+  border-radius: 10px;
+  overflow: hidden;
+  background: #1e1e1e;
+}
+
+.terminalHeader {
+  display: flex;
+  justify-content: space-between;
+  align-items: center;
+  padding: 0.5rem 0.75rem;
+  background: #2d2d2d;
+  border-bottom: 1px solid #3e3e3e;
+  flex-shrink: 0;
+  gap: 0.5rem;
+}
+
+.terminalStatus {
+  display: flex;
+  align-items: center;
+  gap: 0.5rem;
+  min-width: 0;
+}
+
+.terminalStatus .statusDot {
+  width: 8px;
+  height: 8px;
+  border-radius: 50%;
+  flex-shrink: 0;
+}
+
+.terminalStatus .statusText {
+  font-size: 0.8rem;
+  color: #d4d4d4;
+  white-space: nowrap;
+  overflow: hidden;
+  text-overflow: ellipsis;
+}
+
+.terminalActions {
+  display: flex;
+  gap: 0.5rem;
+  align-items: center;
+  flex-shrink: 0;
+}
+
+.terminalClose {
+  padding: 0.25rem 0.6rem;
+  background: transparent;
+  border: 1px solid #666;
+  border-radius: 6px;
+  color: #d4d4d4;
+  cursor: pointer;
+  font-size: 0.8rem;
+}
+
+.terminalClose:hover {
+  background: #3e3e3e;
+}
+
+.terminalContainer {
+  flex: 1;
+  min-height: 0;
+}
+
+.terminalContainer :global(.xterm-viewport) {
+  background: #1e1e1e !important;
+}
+
+.terminalOverlay {
+  position: absolute;
+  inset: 0;
+  background: rgba(0, 0, 0, 0.75);
+  display: grid;
+  place-content: center;
+  z-index: 10;
+}
+
+.terminalOverlayContent {
+  background: #2d2d2d;
+  border: 1px solid #3e3e3e;
+  border-radius: 10px;
+  padding: 1.5rem;
+  text-align: center;
+  max-width: 400px;
+  color: #d4d4d4;
+}
+
+.terminalOverlayContent h3 {
+  margin: 0 0 0.5rem;
+  color: #f14c4c;
+}
+
+.terminalOverlayContent p {
+  margin: 0 0 1rem;
+  font-size: 0.9rem;
+}
+
+.terminalOverlayActions {
+  display: flex;
+  gap: 0.5rem;
+  justify-content: center;
+}
+
+.terminalReconnectBanner {
+  display: flex;
+  align-items: center;
+  gap: 0.5rem;
+  padding: 0.4rem 0.75rem;
+  background: #3e3e3e;
+  color: #f5f543;
+  font-size: 0.8rem;
+  flex-shrink: 0;
+}
+
+.spinner {
+  display: inline-block;
+  width: 12px;
+  height: 12px;
+  border: 2px solid currentColor;
+  border-right-color: transparent;
+  border-radius: 50%;
+  animation: spin 0.75s linear infinite;
+}
+
+@keyframes spin {
+  to {
+    transform: rotate(360deg);
+  }
+}
+
+@media (max-width: 767px) {
+  .terminalOverlayContent {
+    margin: 0 1rem;
+  }
+}